Excellent delivery when it came to specs and procedures. This is the 3rd "how-to" video I've watched and definitely the most straight to the point. Cheers
Just got a used crf250r and it’s having hard start problems, so I checked my valves today and the intakes were the exact same measurements as yours. Only difference is, mine has number 200 shims under the caps so I’m trying to figure what shuns will get me within spec on the intake valves. My exhaust valves are fine. As many others have already said, your detail in showing this procedure is by far the best one on TH-cam.
@@TepcoCycleRepair I appreciate the quick response and help. I just walked out of my local dealer and one of their techs were able to help me by giving them my measurements and current shim size. I’ll be subscribing to your channel and keeping a eye out for future vids.
Wow. I wish you could explain every mechanical project I do. The tips to look out for and details are spectacular. I think I’ll just buy whatever you do videos on so I don’t have to watch other videos and be frustrated.
This is a well thought out ( how too ) and makes it much easier for someone who's just starting out with bikes! Great tips aswell 👌 I don't even have a bike yet haha. But I've subscribed after this one! Great stuff
You can do it, adjusting valves is an extremely important maintenance item you don't want to have to pay someone to do every time. It affects the way the engine runs in many different ways.
This is so helpful! I just got this bike and I may die kickstarting for 15 minutes until it starts lol. I got a carb rebuild kit also. This bike has been given the dinner many times for sure but my kid wanted someone to ride with (his is crf250 and my crf450)
I have the exact same bike ..same year.... my valves need doing soon and having watched your vid it don’t seem so scary any more..... subscribed.... cheers
Thank you very much for that info...my 2005 CRf250r just fired up.. now I have to nail the right shim because is making lots of noise.....same thing right intake was at 0 with 1.90 in shims on it...I dropped it down to 1.74
I have the same exact bike, same year and everything, and it's extremely hard to start. Valves are spot on, bought a new coil (still had original equipment), carb is clean, new spark plug, can't get it to start easy at all. Runs and idles like a top once it is started, but it's 20-30 kicks to get it to fire. Pretty sure compression is good because it's a mother to kick it over (and the top end was done last year with just a handful of easy rides since). It starts easy with a bump start, and once hot it starts in 1-2 kicks, but cold it is awful. Going to move up the pilot jet to a 42 (I think stock is a 40) because it seems like it's hungry for fuel to start (though choke on doesn't seem to help). Would just like my darn bike to start in less than 10 kicks so I can get out on the track!!
I've had similar problems with a bad stator, putting out a weak spark. Tons of kicks, bump start or hot. First I would put the carb to stock settings. If that doesn't help I would personally do a leak down test next. If that passes, I would suspect spark. It should start like the one in this video, this bike had a lot of hours as well.
@@TepcoCycleRepair So today I got it all fixed up. Turns out there was a #45 pilot jet in the bike. I dropped that down to a #42 and it literally starts on the first or second kick now. However, I think I need to drop down even further, because I am 3 complete turns out on the fuel screw based on what I know on that adjustment (back it out to the point where when you pull the hot start lever the bike revs rather than dying). It is night and day though on the cold start, I cannot believe it.
Thanks for the video. I have a 2005 CRF 250x that is hard to start and idles erratically. It's been sitting for years and I need to get the carb rebuilt by someone other than me and check the valves.
Juct got me self a second hand crf250r man befor me spent £525 on a hot start and new shims and fall Service oil filter oil so on the bike is the nuts I’m going to put videos off it up on my channel next day or two this is stank I’m goi g to keep my eye on and do me self 👍🏻you got new sub
This is the first place I’m gonna start my 2008 Crf250r would start pretty well and now I’m kicking and kicking and it will maybe start after a lot of kick but when it’s warm it’s starts right up
Gday. Ive got a similar issue with my 2009 crf. Not sure if this has anything to do with it. My air temp sensor isnt connected. I read something about the bikes computer default is 40°c if the temp sensor isnt working. So even thou its only 10°c outside, the bike thinks its 40°c. Im guessing this is messing with the air/fuel ratio making it hard to start. But im no mechanic. Just having a go.
I got a crf250r its also a 2004 but i had a mechanic just do valves so there good and i just fully rebuilt it and got a new stator it has great power and runs great when it is but the mechanic got it to start and start again when i was there but i was kicking and kicking but I couldn’t start it but with these tips hopefully i can start it!
Great video. Thanks. You make valve adjustment look easy. Just bought my 450x from craigslist. It is hard to electric start, but does ok kickstart. Not sure I need a valve adjustment just yet, but if I do, your video was super helpful. Absolutely love my crf450x. My son just bought a 240x from CL. That bike is more nimble and fun to ride the tough stuff, but a little (lot) less power. Both are fun. Best bike in the world is the one you are riding.
I've had a 450X in supermoto trim great bike. If it starts easy with kick but not with electric. Check battery and starter. Sometimes the starter brushes get worn and the starter doesn't crank fast enough (sounds it but it's not) or the battery is going bad.
I have 2005 honda 450r. It starts ok but im a 2010 pound man and i got to damn near stand on the kicker to push it down. All my friends 450r are way easier to kick. Any idea what that could be?
Just got a 450r you can push the Kickstart with your arm. It started by getting hard to start but it rode fine and then it wouldn't Kickstart. The clutch is also very hard to pull in
@@TepcoCycleRepair ill get a screwdriver and pull the clutch all the way in and it seems like it still doesn't fully engage because it is hard to roll. When riding the clutch won't disengage until the lever is all the way out I believe the cord is too long and stiff or heavy springs
So many fantastic comments on truly one of the best most incredible to the point lamen videos I've seen. Find it hard to comment so I'll say THANK YOU & IM ABSOFUCKINGLUTELY AN INSTANT SUBSCRIBER !!!
Re-shimming will only be a short term fix , if the bike has been run with zero valve clearance the valve faces will be worn and once the surface material has gone the valves wear out even quicker . I would pull the head and renew all valves , very common issue on this model .
Hi tepco, have you ever had a 450x wear out starter motors? I did an oem engine rebuild, now it is rare to kick start it to life. I road race it, had to start it on rollers. With the clutch side open and the gear reduction taken out, the starter still won’t spin over. For what it’s worth the crank takes 30 inch pounds of torque wrenching to spin through the exhaust stroke.
Good work, that intake valve always gets hammered first for some reason whenever it's 0 shimming it will last a short amount of time it needs new valves and seats
Enjoyed the video my friend... I am thinking about buying a local '04 crf450r that's avail. for $1900 maybe lil less?. The owner had it listed $3100 but said would take the $1900 being it needs a lil work as its hard to start.... hopefully a valve adjustment is all it needs? But, still think $1900 is a lil too much for a 17 yr. old bike? WWYD Kinemaster? Thanks Buddy
for you, my friend, your video is very nice, I want to ask you, I have a crf 450 r 2008, the manufacturer says to change the piston and springs every 15 hours, I don't use it as a racer, and I've owned it twice and you can see the piston that it never has the thickness on the bottom side is 95.86 what should I do, change it
Great video mate!! A friend of mine just got an 08' CRF 250, that's super hard to start. It has receipts for just having the valves adjusted (as well as a bunch of other stuff) Do you have any other ideas why it would be so difficult to start? My mate read on a forum somewhere that you should be pumping HEAPS of petrol (gas) into it when starting, like 15 throttle twists plus full choke?!? - this felt like it helped a little but seems excessive to me and I was wondering if it might have something to do with carby jetting? Any ideas or advice would be greatly appreciated!!
So, I would start with putting it back to stock jetting. Then normally, with the choke on, I twist the throttle 4 times then kick if it starts then stalls, 3 more twists then kick. You can richen up the pilot but then you'll have to use the hot start when starting it hot (which leans it out). But first I would check the valves. Because if the valves are sinking, they get out of tolerance quicker. So unless they were adjusted just before he got it, they may need it again.
@@TepcoCycleRepair Thank you so much for the fast reply mate!! I believe the bike is still stock jetting and I don't think the bike had even been ridden between the shop doing valves and my mate taking ownership of it. I tried your starting procedure this morning and it fired up pretty easily!!! It did seem to take maybe 5 minutes or more to 'warm up' (idle with no choke or throttle 'blipping') is this normal, maybe just the idle screw setting? I have only ever owned older 2 stroke bikes and have no idea if this is (or anything) is normal for a 'newer' 4 stroke, so thanks again for your help, it's much appreciated!!
I just bought the same. Bike. Been hearing stories about the valves wearing really fast and needing adjustments soon after being done. Would you recommend putting stainless or titanium valves in to add to the time between adjustments? Just wondering if it’s worth spending the extra cash to save hours in the shop
The issue is usually when they start needing adjustment, they will need frequent adjustments. I would use stainless they will last much longer. Titanium are lighter but won't last as long as stainless, usually people go from titanium to stainless. If you're racing the pro class and need every ounce of power, titanium, everyone else will be fine with stainless.
Hey just wanted to say great video man! Learned a lot from your channel already. At 3:58 you say the exhaust side is .008" - .011". But when I look in the description I notice a different spec. Am I missing something or is there a mistake?
What part of nc are you form I live near Raleigh and I have the exact same bike and same problem we’ve adjusted the carb and everything but it will only bump start never really worked on a 4-stroke would much prefer someone like you to do it you make it seem so simple but Ik I’ll probably run into trouble
Great video! I have an 08 450r and it only starts if I bump start it. Do you think that's the valves? When I try to kick start it there's a few drops of gas that come out of the carb.??? Thanks again for the video.
If it's dripping out of the carb when you're trying to start it, it could be flooding. First I would check the valves because it's the easiest. If they are good, pull and clean the carb checking the float needle and seat. Most likely it's tight valves though. Thanks for watching, lmk what you find.
Hi there.question I have 2004 250x with big bore kit on it.when it’s test run out last year left it till few months ago I’ve done the carb jets a cleaned it all in a ultrasonic cleaner.was told by hot cams that valve gaps should be 28 thow and 12thow.I’ve done this a bike still won’t start up a used to start right up.any help please as to what it is why won’t start.
I have a 05 kx250f that is super hard to start when cold! It will bumpstart with ease then start easily when warm. I checked timing and it was way off. Havent had a chance to try and start it but would that be a reason or would it be valves being too tight or too loose?
I have a 79 Honda xl 500s. It has a million miles on it. It never needed anything other than oil changes and one simple timing chain adjustment. Why these honda bikes suck theses days is beyond me.
Very different bikes. Your bike makes 32hp this 2004 CRF250R makes 42hp that's 10 more hp out of half the size engine. It's a very refined engine with lighter parts that wear faster then bikes like yours. Your XL is a tank and will run forever, these bikes are race machines built for maximum power not longevity.
I have an 07 CRF250 with this issue i think. it may be a two part problem though. When i was able to get it started, I also noticed that it doesnt idle properly. I can crack the throttle, when released, it idles high, then comes back down to idle and sometimes sputters and stalls. I guess I will start with valves, and then will probably have to watch some carb cleaning videos next. Any suggestions? I dont have a leak down tester, but do have a compression tester....maybe I can use that to check compression which in turn should be a quick check on valves correct?
First tune the carb / air screw settings - also check air filter - then if doesn't fix then valve clearance if still doesn't fix then the valves and guides are gone rekt
wow, that would get old fast. trying to start it with bad shims. exactly how long before the next shim change? 2,3,4,5 oil changes? awesome video !! 3000 thumbs up !!
Really all depends on the type of riding. Easy trail riding valve adjustments would be very far apart, motocross racing much closer. Thanks for watching!
Great video. Can you tell me if the two timing marks were perfectly parallel with the head when installed the chain tensioner? Mine are slightly off, just like in your video and my cam chain is installed and released. I’m wondering if the chain has stretched or bad chain tensioner🤔 I removed checked the tensioner operation and it does no compress at all when forced, so I think it’s functional. 2006 CRF250r. Thank you.
If the marks are not aligned with the head the chain is stretched. I do a timing chain every time I do a top end. A stretched chain will make it difficult to start. You need a special flywheel puller to do it but it's easy and the Honda OEM chain is cheap.
@@TepcoCycleRepair wow I just noticed all of my typos. Ok good to know, I’m going to pick up the puller and probably add a new chain and tensioner. I’ve read on forums that these tensioners can fail often.
Is it safe to assume that I can’t check valve clearances accurately with a stretched cam chain? Currently IN/0.005 & EX/ R0.08 L0.07. I should install the new one, then take a new clearance reading for the accurate #’s...
@@TepcoCycleRepair Thanks you for clearing that up. This makes sense, since were are going off at TDC. I did run a leak down test and did hear air blowing out the exhaust. The rest of the leakage test was inconclusive, due the device not being totally secured to truly measure leakage %. Side note: The OTC brand name leakage tester I used wasn’t the correct tool. I chose it over Motion Pro, because it had thousands of reviews @4/5* and the Motion Pro only had 2 reviews. This was a bad idea due to the thread length was not long enough to engage the spark plug hole. I attempted to take the o-ring and it did engage barely enough to push air in and feel it going past the exhaust valves.-Inconclusive
Hey I just bought an 07 crf250r, it hasn’t been started in a month but it does run. I cant seem to get it to kick up but the guy sent vids of it running in warm weather. It just sounds like a really cold engine. Maybe a carb rebuild?
Check the valves, clean the carb. Make sure the jets and mixture screw are set to stock settings, new spark plug and fuel. See what it does then. When you clean the carb, make sure the accelerator pump is working.
@@quinnCS Don't get an aftermarket carb. Order the factory parts you need from rocky mountain atv or partzilla or any online parts place. OEM carbs are always better and I will always rebuild them instead of replacing with an aftermarket one.
@@TepcoCycleRepair good job on the valve adjustment . i got some schooling today . i have a honda xr150L here in the philippines [retired American expat] it seems to a characteristic of this engine to take a long time to warm even when new . there is some type of air valve added for the carburetor . its hard to get info on this motor . i wonder if this can be eliminated to help with long warm up time . it hardly ever gets below 80 degrees here and still needs a full choke . and minutes to get to no choke ,but still needs to be revved up to avoid stalling . and it can still stall still when slowing down . pretty annoying .
I adjusted my valves when I put everything back together I tried to start it the timing chain fell off. I aligned all the marks again but the bike still won’t start. What els could this be?
I dont think thats my problem but I cant figure it out i have a modified dr350. increased compression mikuni flat slide carb. It starts real easy if i roll it down a hill and pop start it, but I cant get it to even try to start with the kick start. At my 260 lb I can put all my weight on the kick start and it takes several seconds to move. Ihave to get it at the top and kick it back with my leg muscles instead of down with my weight.
So I adjusted valves still hard to start but when it did I herd a clanking noise. Applied some tention to the chain and noise went away but now hard to start. Could that mean I need to replace timing chain?
.005 intake .011 exhaust in inches or .12 intake .28 exhaust in mm + or -.003 Here is a good link for info on your bike. thumpertalk.com/forums/topic/429421-honda-crf250x-faqs-in-progress/
Hi there. I have an 05 crf250r can't get it to start. New cyl head, valves, piston, crank, cam, carb, plug everything is brand new and it still won't run. Timing and valve clearance are all in spec. Any ideas?
At 9:09 where did the numbers 182 and 151 come from and how did you decide to go with a 149 ? If you wouldn’t mind explaining this math concept that would be very helpful. I have the same make and model and having the same issue so this video is just what I’ve been looking for
Also with the shims you said to measure them before putting them back in, is it best to just buy a shim kit with all different sizes to ensure you have the right size you’ll need?
182 and 151 were the thicknesses of the shims that were in the bike already. The numbers you see above those are the measured gaps before pulling it apart. The math is simple the left measured a 182 with a .003 gap, if I want a .004 gap I would look for a 181 shim so 182 + 003 = 185 then minus the gap you want, .004 185 - 004 = 181 shim. What I mean by measure the shim first is don't go by what is printed on the shim, most measure differently. The right side gap was measuring .000 so I was just picking a thickness to give me a gap to do some math with.
What is the best/easiest way to rotate the camshaft as you state a couple of times to reach TDC and at the end of the video to check the valves after replacing new shims?
I just got 03 crf450..started 1st time from cold was out on it for 30min I turned it off and would not start again. Could that be a valve clearance issue
I have a 2008 crf250r sat a while, cleaned the carb everything crystal clear put it back together and have this problem now. How can I find the clearance measurements and how shins are sold? Thanks
Measurements are the same as in the video. You can order them on line but I would go to a local shop with the shims you don't need and see if they can swap them out. Sometimes you can swap the ones you have around to make the gaps correct.
I have a 2005 crf250x that I just did a valve adjustment on but I cant seem to get the timing chain back on it has a hot cam in it but i dont know if thats stock to the bike or not. If you have any tips please help.
@@brodies4811 Hmm ok, slide the bearing towards the cam gear to get the chain on, then slide the bearing back into place, you may have to tilt the cam as well.
No they are not. Most common sizes are 7.48mm and 9.48mm this CRF250R takes 7.48mm your CRF450R takes 9.48mm. Double check before ordering to be sure you get the right ones for your bike.
What if your bike had high compression and its hard to start? I have a 2010 txc250 and i just cleaned the carb and havnt tried to start it yet, but the carb was already pretty clean, do you know what the issue could be?
You can get them from rocky mountain ATV or any online dealer. But the best way is to measure and go to your local dealership and buy from them, this way if you measured wrong they will usually swap them out for the right size.
My2012 crf 250 idles just a tad bit high a but my idle adjustment knob will not turn the bike starts good and runs like it’s supposed to should I jus leave it alone ?
The idle speed for your bike should be 2000 rpm + or - 100. Remember in your bike to turn the idle down you need to turn it in, not out like other carb bikes. Try to measure your rpm to see where it's at the try that knob again by turning it in to get the right idle. These bikes normally idle higher than most people think so you might not be that far off. Thanks for watching.
Intake is .15-.20mm exhaust is .17-.23mm. Many things could cause it not to start. Check the basics, make sure your timing marks are correct, check for spark, check that valves are within spec, make sure your carb is clean with the proper jets. If any of these things are off you need to fix that first. Ideally you need a leak down test done to check that everything is sealed up good.
My 2005 cr250r has been built by the previous owner top to bottom but it takes about 15min of Kicking for it to even start up. If we pull it and release the clutch it starts up just fine. Any ideas?
Usually low compression will act like that. I know you said it was rebuilt but first thing I would do is check valve clearance, if they are good, a leak down test to see if the rings are bad. I've seen many people reuse valve seats with new valves and they don't seal properly. Also if they reused the valves they could be on their way out.
Lean condition on the pilot circuit or an exhaust leak at the header gasket will be you most common reasons. Make sure the header gasket is good, then you can try turning the mixture screw out a little to richen it up. If that doesn't work, try the next richer pilot jet.
My crf 450r will start easy in the heat and wont start in cold but itll start one kick in the heat if not ill need to kick it alot to start do u think it needs an adjustment
I would check the timing marks on the cam and make sure your they are spot on. You may have a stretched timing chain. Check your valves while you have the valve cover off. If all that checks out good, most likely your rings are worn and a top end is required. I have a 250x top end video, it should be the same.
I got a crf450r and it starts when its cold but after it runs like 30 seconds or a min and i try to go and when i stall it (new rider) i cant start it acter its been started already and i have to wait untill it cools. the valvs where just adjusted to
hey i gotta 06 crf 450r jus got rebuilt from the shop new piston rings and cylinder and it’s having are time starting and i have no experience with shimming valves can you please help?
@@TepcoCycleRepair okay will do what feeler gage should i start with? also wen i do get it started the pipe gets super hot like it’s overheating pretty fast and it sputters and it dies with choke out.
@@loiadias Of it dies with the choke off, you need to clean the pilot jet. You can rotate the carb and pull the jets without removing the carb, i have a video on that on a 2004 250x which is similar. th-cam.com/video/uGVMbhJY7TM/w-d-xo.html
@@loiadias Ok, I use a thin set of feeler gauges off the Snap-on truck, they seem to work the best. Let me see if I can get the part number, they're probably available off the truck for much cheaper.
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Excellent delivery when it came to specs and procedures. This is the 3rd "how-to" video I've watched and definitely the most straight to the point. Cheers
Thank you!
I'm a 2T guy but this video really helped me with a friend's bike - Thanks for your exceptional how-to!!!
I'm a 2 stroke guy as well but we have to understand how to fix these 4 strokes..
Just got a used crf250r and it’s having hard start problems, so I checked my valves today and the intakes were the exact same measurements as yours. Only difference is, mine has number 200 shims under the caps so I’m trying to figure what shuns will get me within spec on the intake valves. My exhaust valves are fine. As many others have already said, your detail in showing this procedure is by far the best one on TH-cam.
@@EricGrey-d6e Thanks! There are a few charts as well as apps that will help you figure out shim size.
@@TepcoCycleRepair I appreciate the quick response and help. I just walked out of my local dealer and one of their techs were able to help me by giving them my measurements and current shim size. I’ll be subscribing to your channel and keeping a eye out for future vids.
Wow. I wish you could explain every mechanical project I do. The tips to look out for and details are spectacular.
I think I’ll just buy whatever you do videos on so I don’t have to watch other videos and be frustrated.
This is a well thought out ( how too ) and makes it much easier for someone who's just starting out with bikes! Great tips aswell 👌 I don't even have a bike yet haha. But I've subscribed after this one! Great stuff
The easier start cold than hot part is very true
any tips for hot start? Its true that cold start is much easier to start than hot part. My bike crf250r 2006
@@kawaneki6274 This is a sign of tight valves.
@@TepcoCycleRepair already sold my honda and bought 250 2 stroke :)
@@kawaneki6274 Good call, 2 strokes are awesome. My main bike is a 21 BETA 200rr.
@@TepcoCycleRepair my is Husaberg TE250 2012
This video has given me a lot of confidence and hope.
Thank you
You can do it, adjusting valves is an extremely important maintenance item you don't want to have to pay someone to do every time. It affects the way the engine runs in many different ways.
This is so helpful! I just got this bike and I may die kickstarting for 15 minutes until it starts lol. I got a carb rebuild kit also. This bike has been given the dinner many times for sure but my kid wanted someone to ride with (his is crf250 and my crf450)
Did that help any?
I had no idea on how valves worked until I saw this video thanks man!
I have the exact same bike ..same year.... my valves need doing soon and having watched your vid it don’t seem so scary any more..... subscribed.... cheers
Thank you very much for that info...my 2005 CRf250r just fired up.. now I have to nail the right shim because is making lots of noise.....same thing right intake was at 0 with 1.90 in shims on it...I dropped it down to 1.74
Yeah it's tough when you start with zero, you have to throw something smaller in there to get some gap to measure.
This Saved my life ! I been leaving 10 mins extra early for work just to kick my bike on
What would be the normal price a mechanic would charge for a job like this?
@@robertos.5414 I’m actually having my mechanic come to me but I’ve had two estimates from both different guys saying they’d do it for 150-160$
It’s gonna be about a 2 hour job or just near
this was posted exactly 1 year ago and i just found it today. thanks for the video
I'm about to do a top end video on a CRF250X if you need to do that at any time.
@@TepcoCycleRepair is the valve ajustment specs on the x different 2004 250x
@@user-sj3nu4ku3s Yes Intake .004"-.006" Exhaust .010"-.012"
I have the same exact bike, same year and everything, and it's extremely hard to start. Valves are spot on, bought a new coil (still had original equipment), carb is clean, new spark plug, can't get it to start easy at all. Runs and idles like a top once it is started, but it's 20-30 kicks to get it to fire. Pretty sure compression is good because it's a mother to kick it over (and the top end was done last year with just a handful of easy rides since). It starts easy with a bump start, and once hot it starts in 1-2 kicks, but cold it is awful. Going to move up the pilot jet to a 42 (I think stock is a 40) because it seems like it's hungry for fuel to start (though choke on doesn't seem to help). Would just like my darn bike to start in less than 10 kicks so I can get out on the track!!
I've had similar problems with a bad stator, putting out a weak spark. Tons of kicks, bump start or hot. First I would put the carb to stock settings. If that doesn't help I would personally do a leak down test next. If that passes, I would suspect spark. It should start like the one in this video, this bike had a lot of hours as well.
@@TepcoCycleRepair So today I got it all fixed up. Turns out there was a #45 pilot jet in the bike. I dropped that down to a #42 and it literally starts on the first or second kick now. However, I think I need to drop down even further, because I am 3 complete turns out on the fuel screw based on what I know on that adjustment (back it out to the point where when you pull the hot start lever the bike revs rather than dying). It is night and day though on the cold start, I cannot believe it.
Thanks for the video. I have a 2005 CRF 250x that is hard to start and idles erratically. It's been sitting for years and I need to get the carb rebuilt by someone other than me and check the valves.
It should run like a top when you do.
Juct got me self a second hand crf250r man befor me spent £525 on a hot start and new shims and fall Service oil filter oil so on the bike is the nuts I’m going to put videos off it up on my channel next day or two this is stank I’m goi g to keep my eye on and do me self 👍🏻you got new sub
Your video was great help for me to start working on my 150...
I know the amazing feeling when you chase a no start. Best feeling when it starts first kick.
You made this so uncomplicated, thank you. Subscribed. :)
Much apreciated the video exactly what i needed to know about my bike with the same issue.
This is the first place I’m gonna start my 2008 Crf250r would start pretty well and now I’m kicking and kicking and it will maybe start after a lot of kick but when it’s warm it’s starts right up
Having same problem but my valves are good
Atomic Dom my bike won’t even start while it’s cold.
Kai Stewart yeah same when my bikes cold it won’t start but if it starts and warms up then it starts right up
Gday. Ive got a similar issue with my 2009 crf. Not sure if this has anything to do with it. My air temp sensor isnt connected. I read something about the bikes computer default is 40°c if the temp sensor isnt working. So even thou its only 10°c outside, the bike thinks its 40°c. Im guessing this is messing with the air/fuel ratio making it hard to start. But im no mechanic. Just having a go.
I got a crf250r its also a 2004 but i had a mechanic just do valves so there good and i just fully rebuilt it and got a new stator it has great power and runs great when it is but the mechanic got it to start and start again when i was there but i was kicking and kicking but I couldn’t start it but with these tips hopefully i can start it!
Same thing is happening to me right now same bike
Great video. Thanks. You make valve adjustment look easy.
Just bought my 450x from craigslist. It is hard to electric start, but does ok kickstart. Not sure I need a valve adjustment just yet, but if I do, your video was super helpful. Absolutely love my crf450x. My son just bought a 240x from CL. That bike is more nimble and fun to ride the tough stuff, but a little (lot) less power. Both are fun.
Best bike in the world is the one you are riding.
I've had a 450X in supermoto trim great bike. If it starts easy with kick but not with electric. Check battery and starter. Sometimes the starter brushes get worn and the starter doesn't crank fast enough (sounds it but it's not) or the battery is going bad.
I have 2005 honda 450r. It starts ok but im a 2010 pound man and i got to damn near stand on the kicker to push it down. All my friends 450r are way easier to kick. Any idea what that could be?
Great video best one lve seen on valve adjustment. A+.
Great video thank you so much on the information i need to work on my 04 crf 250r its hard to start nd it gets worst when is hot
Then this is definitely your issue!
Just got a 450r you can push the Kickstart with your arm. It started by getting hard to start but it rode fine and then it wouldn't Kickstart. The clutch is also very hard to pull in
Definitely check your valves first. Also check your clutch springs, someone may have put heavy duty springs in.
@@TepcoCycleRepair ill get a screwdriver and pull the clutch all the way in and it seems like it still doesn't fully engage because it is hard to roll. When riding the clutch won't disengage until the lever is all the way out I believe the cord is too long and stiff or heavy springs
So many fantastic comments on truly one of the best most incredible to the point lamen videos I've seen. Find it hard to comment so I'll say THANK YOU & IM ABSOFUCKINGLUTELY AN INSTANT SUBSCRIBER !!!
Awesome, thanks for the comment and sub!
Re-shimming will only be a short term fix , if the bike has been run with zero valve clearance the valve faces will be worn and once the surface material has gone the valves wear out even quicker . I would pull the head and renew all valves , very common issue on this model .
No argument there.
Awesome Job man. I learned a lot 👍🏻
Great video, will be getting my bike checked.
My ktm 525 was always in spec. 2 stroke much easier to work on
Just got a 05 crf250r. Hard to start. Can you help me get specs for these valves? Great video BTW. Thx
@@SteveMcmahel google is your best bet
Steve Mcmahel you can always call your local Honda dealer and they will tell you the specs
Bro was you’re ktm always hard to start I have a 525 it takes forever to start
Great detail my friend well done and thanks!
Hi tepco, have you ever had a 450x wear out starter motors? I did an oem engine rebuild, now it is rare to kick start it to life. I road race it, had to start it on rollers. With the clutch side open and the gear reduction taken out, the starter still won’t spin over. For what it’s worth the crank takes 30 inch pounds of torque wrenching to spin through the exhaust stroke.
No, I had a 450x set up for Supermoto and never had an issue with the starter.
Good work, that intake valve always gets hammered first for some reason whenever it's 0 shimming it will last a short amount of time it needs new valves and seats
Agreed, this one was on its way out!
Nice work. I am having the same problem.
LOL thats how I felt with my 2006 crf250r. Kicking for 15 minutes and it might start.
What a dam good video, I didnt even need to do a valve adjustment, nor have a hard start issue😁
Enjoyed the video my friend... I am thinking about buying a local '04 crf450r that's avail. for $1900 maybe lil less?. The owner had it listed $3100 but said would take the $1900 being it needs a lil work as its hard to start.... hopefully a valve adjustment is all it needs? But, still think $1900 is a lil too much for a 17 yr. old bike? WWYD Kinemaster? Thanks Buddy
Hello, my name is Rick and I'm a recovering torque-aholic.
nice
for you, my friend, your video is very nice, I want to ask you, I have a crf 450 r 2008, the manufacturer says to change the piston and springs every 15 hours, I don't use it as a racer, and I've owned it twice and you can see the piston that it never has the thickness on the bottom side is 95.86 what should I do, change it
If you don't race it you can go an easy 100hrs. I usually base it on a leak down test, more than 10% and I'm looking to replace whatever is leaking.
My 2009 looks the same if I'm not mistaken you said that that was a 2004 but I don't know much about Honda's design changes over the years so 🤔
Yep, this one is a 2004. They didn't change much up until efi, check the 10th digit of your vin to verify the year.
Amazing video, excellent explanations!
Great video mate!! A friend of mine just got an 08' CRF 250, that's super hard to start. It has receipts for just having the valves adjusted (as well as a bunch of other stuff) Do you have any other ideas why it would be so difficult to start? My mate read on a forum somewhere that you should be pumping HEAPS of petrol (gas) into it when starting, like 15 throttle twists plus full choke?!? - this felt like it helped a little but seems excessive to me and I was wondering if it might have something to do with carby jetting? Any ideas or advice would be greatly appreciated!!
So, I would start with putting it back to stock jetting. Then normally, with the choke on, I twist the throttle 4 times then kick if it starts then stalls, 3 more twists then kick. You can richen up the pilot but then you'll have to use the hot start when starting it hot (which leans it out). But first I would check the valves. Because if the valves are sinking, they get out of tolerance quicker. So unless they were adjusted just before he got it, they may need it again.
@@TepcoCycleRepair Thank you so much for the fast reply mate!! I believe the bike is still stock jetting and I don't think the bike had even been ridden between the shop doing valves and my mate taking ownership of it. I tried your starting procedure this morning and it fired up pretty easily!!! It did seem to take maybe 5 minutes or more to 'warm up' (idle with no choke or throttle 'blipping') is this normal, maybe just the idle screw setting? I have only ever owned older 2 stroke bikes and have no idea if this is (or anything) is normal for a 'newer' 4 stroke, so thanks again for your help, it's much appreciated!!
@@macca462 So the newer 4 strokes idle higher than the older ones. Set the idle to 1700-1800 rpm.
@@TepcoCycleRepair Thank you!!
Best video ever. Thank You!
This video saved me so much time
Bro you’re the man 💪🏼👍🏼
I just bought the same. Bike. Been hearing stories about the valves wearing really fast and needing adjustments soon after being done. Would you recommend putting stainless or titanium valves in to add to the time between adjustments? Just wondering if it’s worth spending the extra cash to save hours in the shop
The issue is usually when they start needing adjustment, they will need frequent adjustments. I would use stainless they will last much longer. Titanium are lighter but won't last as long as stainless, usually people go from titanium to stainless. If you're racing the pro class and need every ounce of power, titanium, everyone else will be fine with stainless.
Great tips but keep everything lubed and everything will slide easily ✌️
I have this exact problem on a 2010 crf450, I don’t suppose you’d point me In The direction of the clearance spec info?? Much appreciated.
Intake 0.16mm Exhaust 0.28mm plus or minus .03 on both and you're good.
I have problem when bike is hot,the clearance is good,any ideas??
Thank you
Hey just wanted to say great video man! Learned a lot from your channel already. At 3:58 you say the exhaust side is .008" - .011". But when I look in the description I notice a different spec. Am I missing something or is there a mistake?
Good catch. The description is the book specs but I would run the exhaust .008"-.011" .009" is a good compromise.
Best video explanation 👌. Thank you
What part of nc are you form I live near Raleigh and I have the exact same bike and same problem we’ve adjusted the carb and everything but it will only bump start never really worked on a 4-stroke would much prefer someone like you to do it you make it seem so simple but Ik I’ll probably run into trouble
I'm about 2 hrs from you near High point.
@@TepcoCycleRepair awesome yeah not to far, how much would it be for you to do something like that??
Great video! I have an 08 450r and it only starts if I bump start it. Do you think that's the valves? When I try to kick start it there's a few drops of gas that come out of the carb.??? Thanks again for the video.
If it's dripping out of the carb when you're trying to start it, it could be flooding. First I would check the valves because it's the easiest. If they are good, pull and clean the carb checking the float needle and seat. Most likely it's tight valves though. Thanks for watching, lmk what you find.
Hi there.question I have 2004 250x with big bore kit on it.when it’s test run out last year left it till few months ago I’ve done the carb jets a cleaned it all in a ultrasonic cleaner.was told by hot cams that valve gaps should be 28 thow and 12thow.I’ve done this a bike still won’t start up a used to start right up.any help please as to what it is why won’t start.
Well done, it sounded great after the valves job, just out of curiosity how long did the whole work took?
Much longer due to filming, but it can easily be done in under an hour with the right tools and shims on hand.
I have a 05 kx250f that is super hard to start when cold! It will bumpstart with ease then start easily when warm. I checked timing and it was way off. Havent had a chance to try and start it but would that be a reason or would it be valves being too tight or too loose?
Interesting. I've just checked my valves and I got a 0.00 clearance on the same intake valve. I wonder if it is just a co-incidence or a CRF problem.
No, intakes are softer and always move first. If you need to replace, use stainless and they will last much longer.
if its got a intake thats reading that low of a clearance its most likely started to wear the valve and have recess on the 45
Definitely wearing! Usually when you have to start shimming them they are going out.
I have a 79 Honda xl 500s. It has a million miles on it. It never needed anything other than oil changes and one simple timing chain adjustment. Why these honda bikes suck theses days is beyond me.
Very different bikes. Your bike makes 32hp this 2004 CRF250R makes 42hp that's 10 more hp out of half the size engine. It's a very refined engine with lighter parts that wear faster then bikes like yours. Your XL is a tank and will run forever, these bikes are race machines built for maximum power not longevity.
I have an 07 CRF250 with this issue i think. it may be a two part problem though. When i was able to get it started, I also noticed that it doesnt idle properly. I can crack the throttle, when released, it idles high, then comes back down to idle and sometimes sputters and stalls. I guess I will start with valves, and then will probably have to watch some carb cleaning videos next. Any suggestions? I dont have a leak down tester, but do have a compression tester....maybe I can use that to check compression which in turn should be a quick check on valves correct?
First tune the carb / air screw settings - also check air filter - then if doesn't fix then valve clearance if still doesn't fix then the valves and guides are gone rekt
wow, that would get old fast. trying to start it with bad shims.
exactly how long before the next shim change? 2,3,4,5 oil changes?
awesome video !!
3000 thumbs up !!
Really all depends on the type of riding. Easy trail riding valve adjustments would be very far apart, motocross racing much closer. Thanks for watching!
On a Honda crf 450 r 2005
Track riding , every 16 hrs
This is exactly what’s wrong with my 2013 crf450r I’m getting the shins redone wedsnedau can’t wait tired of having to bump it till it’s warm
Should start much better!
Hey so once it was warm you could've kickstart after?
@@justablackman899 yes it starts right up as soon as it’s warm
@@justablackman899 Before the adjustment, yes it was "easier" but still difficult.
@@TepcoCycleRepair i have the same problem on my crf450 2009.. could it also be a stator problem?
Thanks you sir for the knowledge👍
Great video. Can you tell me if the two timing marks were perfectly parallel with the head when installed the chain tensioner? Mine are slightly off, just like in your video and my cam chain is installed and released. I’m wondering if the chain has stretched or bad chain tensioner🤔 I removed checked the tensioner operation and it does no compress at all when forced, so I think it’s functional. 2006 CRF250r. Thank you.
If the marks are not aligned with the head the chain is stretched. I do a timing chain every time I do a top end. A stretched chain will make it difficult to start. You need a special flywheel puller to do it but it's easy and the Honda OEM chain is cheap.
@@TepcoCycleRepair wow I just noticed all of my typos. Ok good to know, I’m going to pick up the puller and probably add a new chain and tensioner. I’ve read on forums that these tensioners can fail often.
Is it safe to assume that I can’t check valve clearances accurately with a stretched cam chain? Currently IN/0.005 & EX/ R0.08 L0.07. I should install the new one, then take a new clearance reading for the accurate #’s...
@@robwisniewski5160 Most likely measurements will be the same, a stretched chain just messes with the timing of the valves.
@@TepcoCycleRepair Thanks you for clearing that up. This makes sense, since were are going off at TDC. I did run a leak down test and did hear air blowing out the exhaust. The rest of the leakage test was inconclusive, due the device not being totally secured to truly measure leakage %.
Side note: The OTC brand name leakage tester I used wasn’t the correct tool. I chose it over Motion Pro, because it had thousands of reviews @4/5* and the Motion Pro only had 2 reviews. This was a bad idea due to the thread length was not long enough to engage the spark plug hole. I attempted to take the o-ring and it did engage barely enough to push air in and feel it going past the exhaust valves.-Inconclusive
Awesome video. Thank you!
Hey I just bought an 07 crf250r, it hasn’t been started in a month but it does run. I cant seem to get it to kick up but the guy sent vids of it running in warm weather. It just sounds like a really cold engine. Maybe a carb rebuild?
Check the valves, clean the carb. Make sure the jets and mixture screw are set to stock settings, new spark plug and fuel. See what it does then. When you clean the carb, make sure the accelerator pump is working.
@@TepcoCycleRepair the accelerator pump had a shot o ring! We are going to order a new carb. Do you think this will fix it?
@@quinnCS Don't get an aftermarket carb. Order the factory parts you need from rocky mountain atv or partzilla or any online parts place. OEM carbs are always better and I will always rebuild them instead of replacing with an aftermarket one.
@@TepcoCycleRepair good job on the valve adjustment . i got some schooling today . i have a honda xr150L here in the philippines [retired American expat] it seems to a characteristic of this engine to take a long time to warm even when new . there is some type of air valve added for the carburetor . its hard to get info on this motor . i wonder if this can be eliminated to help with long warm up time . it hardly ever gets below 80 degrees here and still needs a full choke . and minutes to get to no choke ,but still needs to be revved up to avoid stalling . and it can still stall still when slowing down . pretty annoying .
I adjusted my valves when I put everything back together I tried to start it the timing chain fell off. I aligned all the marks again but the bike still won’t start. What els could this be?
Hopefully you didn't damage a valve. If you didn't and have a good spark, I would focus on the carb.
Awesome video ñearned alot💯
I dont think thats my problem but I cant figure it out i have a modified dr350. increased compression mikuni flat slide carb.
It starts real easy if i roll it down a hill and pop start it, but I cant get it to even try to start with the kick start.
At my 260 lb I can put all my weight on the kick start and it takes several seconds to move. Ihave to get it at the top and kick it back with my leg muscles instead of down with my weight.
I would start with a leak down test and that should answer some questions. If you are lower than 10%, then I would focus on carb settings.
Hi there did you notice a big difference in the feel of the kick start before and after valve adjustment ? Thanks
Yes, it felt like it had very low compression before the adjustment.
So I adjusted valves still hard to start but when it did I herd a clanking noise. Applied some tention to the chain and noise went away but now hard to start. Could that mean I need to replace timing chain?
Timing chain is fine if its not broken lol. If the valves are good and the timing is correct and still no start id look into the carb
Awesome video ... Where is your shop located? i'm OMW = )
I'm in NC.
Where would I get the specs for a 2008 CRF250X? I'm having the same problem I'm sure its the valves
.005 intake .011 exhaust in inches or
.12 intake .28 exhaust in mm + or -.003
Here is a good link for info on your bike.
thumpertalk.com/forums/topic/429421-honda-crf250x-faqs-in-progress/
@@TepcoCycleRepair Seriously TY very much bud Happy holidays merry xmas
Hi there. I have an 05 crf250r can't get it to start. New cyl head, valves, piston, crank, cam, carb, plug everything is brand new and it still won't run. Timing and valve clearance are all in spec. Any ideas?
Is it getting spark?
At 9:09 where did the numbers 182 and 151 come from and how did you decide to go with a 149 ? If you wouldn’t mind explaining this math concept that would be very helpful. I have the same make and model and having the same issue so this video is just what I’ve been looking for
Also with the shims you said to measure them before putting them back in, is it best to just buy a shim kit with all different sizes to ensure you have the right size you’ll need?
182 and 151 were the thicknesses of the shims that were in the bike already. The numbers you see above those are the measured gaps before pulling it apart. The math is simple the left measured a 182 with a .003 gap, if I want a .004 gap I would look for a 181 shim so 182 + 003 = 185 then minus the gap you want, .004 185 - 004 = 181 shim. What I mean by measure the shim first is don't go by what is printed on the shim, most measure differently. The right side gap was measuring .000 so I was just picking a thickness to give me a gap to do some math with.
Awesome thank you for explaining. That was definitely helpful
What is the best/easiest way to rotate the camshaft as you state a couple of times to reach TDC and at the end of the video to check the valves after replacing new shims?
Use the allen through the hole seen at 2:27 rotate it clockwise, that's what you use to rotate the engine.
I just got 03 crf450..started 1st time from cold was out on it for 30min I turned it off and would not start again. Could that be a valve clearance issue
Yes absolutely could be tight valves. Check your basics first, spark and fuel. If those are good, check the valves.
I have a 2008 crf250r sat a while, cleaned the carb everything crystal clear put it back together and have this problem now. How can I find the clearance measurements and how shins are sold? Thanks
Measurements are the same as in the video. You can order them on line but I would go to a local shop with the shims you don't need and see if they can swap them out. Sometimes you can swap the ones you have around to make the gaps correct.
Thank you!
Did you use the same shims or didn’t you buy new ones. If you bought new ones where at?
I have a shim kit from PRO-X.
I just rebuilt my 2014 CRF450R. It has spark, fuel and good valve clearance but still won’t start. Any ideas?
Float bowl height correct in carb. And is your fuel screw out atleast 2 turns.
I got a 2008 crf250r does the same shim spec apply to my year? I also don’t have the Manuel that’s why I ask, thanks in advance
Yes, the same equation. Or you can get a shim calculator in the play store or on line.
I have a 2005 crf250x that I just did a valve adjustment on but I cant seem to get the timing chain back on it has a hot cam in it but i dont know if thats stock to the bike or not. If you have any tips please help.
@@brodies4811 Do you have the tensioner removed?
Yes
@@brodies4811 Hmm ok, slide the bearing towards the cam gear to get the chain on, then slide the bearing back into place, you may have to tilt the cam as well.
@@TepcoCycleRepair okay I will try that thank you🙏
Video was great help 💪🏻
Very informative video. I'm going to try this on my 2008 crf450r.
did it work?
I bought a 2008 450r and it backfires and pops bad. I rebuilt the carburetor. I hope that was it. I’ll find out soon.
Are all Shims the same diameter? I have a 2006 Honda CRF450R and want to make sure I'm getting the correct diameter sized shim. Thanks
No they are not. Most common sizes are 7.48mm and 9.48mm this CRF250R takes 7.48mm your CRF450R takes 9.48mm. Double check before ordering to be sure you get the right ones for your bike.
Tepco Cycle Repair ok thank you!
What if your bike had high compression and its hard to start? I have a 2010 txc250 and i just cleaned the carb and havnt tried to start it yet, but the carb was already pretty clean, do you know what the issue could be?
Make sure it has a good spark. When stators are going bad they will be hard to start.
I got same bike same problem CRF250X refuses to start
Found out the valves in my 150r are to tight. Where do i buy the replacement shims from?
You can get them from rocky mountain ATV or any online dealer. But the best way is to measure and go to your local dealership and buy from them, this way if you measured wrong they will usually swap them out for the right size.
My2012 crf 250 idles just a tad bit high a but my idle adjustment knob will not turn the bike starts good and runs like it’s supposed to should I jus leave it alone ?
The idle speed for your bike should be 2000 rpm + or - 100. Remember in your bike to turn the idle down you need to turn it in, not out like other carb bikes. Try to measure your rpm to see where it's at the try that knob again by turning it in to get the right idle. These bikes normally idle higher than most people think so you might not be that far off. Thanks for watching.
Have a crf 250 thats hard to start cold but easier when heated up would this be caused by valve clearance?
Sounds carb related. I would clean all the jets and set the float height.
I’m struggling to start my rmz 450 2005 I can’t find the valve adjustments for my spec? What else could cause it not to start?
Intake is .15-.20mm exhaust is .17-.23mm. Many things could cause it not to start. Check the basics, make sure your timing marks are correct, check for spark, check that valves are within spec, make sure your carb is clean with the proper jets. If any of these things are off you need to fix that first. Ideally you need a leak down test done to check that everything is sealed up good.
Tepco Cycle Repair thank you!
Great vid. Thanks.
My 2005 cr250r has been built by the previous owner top to bottom but it takes about 15min of Kicking for it to even start up. If we pull it and release the clutch it starts up just fine. Any ideas?
Usually low compression will act like that. I know you said it was rebuilt but first thing I would do is check valve clearance, if they are good, a leak down test to see if the rings are bad. I've seen many people reuse valve seats with new valves and they don't seal properly. Also if they reused the valves they could be on their way out.
Assuming the carb is all good.
Tepco Cycle Repair Where are you located at? If your close to me I could pay you to check it out or fix it. I’m new to this.
I bought a 2008 450r that backfires and pops a lot when I release the throttle. What would that be from?
Lean condition on the pilot circuit or an exhaust leak at the header gasket will be you most common reasons. Make sure the header gasket is good, then you can try turning the mixture screw out a little to richen it up. If that doesn't work, try the next richer pilot jet.
My crf 450r will start easy in the heat and wont start in cold but itll start one kick in the heat if not ill need to kick it alot to start do u think it needs an adjustment
I would check the timing marks on the cam and make sure your they are spot on. You may have a stretched timing chain. Check your valves while you have the valve cover off. If all that checks out good, most likely your rings are worn and a top end is required. I have a 250x top end video, it should be the same.
I have a crf 250 2010 and wont start do you no the correct valve clearances for it thanks
If it's the 250R intake .004"-.006" and exhaust .008"-.011"
Great video thank you :)
Hey can i get the specs for 2013 honda crf250r valves my bike is giving me the same problem and im having a hard time finding the right measurements
005 inch, intake .012 inch exhaust or .12mm, intake .28mm exhaust.
thanks 🙏🏻
I got a crf450r and it starts when its cold but after it runs like 30 seconds or a min and i try to go and when i stall it (new rider) i cant start it acter its been started already and i have to wait untill it cools. the valvs where just adjusted to
Are you using the hot start lever? And is the carb jetted properly.
hey i gotta 06 crf 450r jus got rebuilt from the shop new piston rings and cylinder and it’s having are time starting and i have no experience with shimming valves can you please help?
Sure, first thing I would do is just check them and see if they even need shimming.
@@TepcoCycleRepair okay will do what feeler gage should i start with? also wen i do get it started the pipe gets super hot like it’s overheating pretty fast and it sputters and it dies with choke out.
@@loiadias Of it dies with the choke off, you need to clean the pilot jet. You can rotate the carb and pull the jets without removing the carb, i have a video on that on a 2004 250x which is similar.
th-cam.com/video/uGVMbhJY7TM/w-d-xo.html
@@TepcoCycleRepair i went through the whole carb nothing was clogged at all
@@loiadias Ok, I use a thin set of feeler gauges off the Snap-on truck, they seem to work the best. Let me see if I can get the part number, they're probably available off the truck for much cheaper.
Great video