How-To: FCR carburetor accelerator pump timing adjustment
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- เผยแพร่เมื่อ 9 พ.ค. 2017
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In this video, I show you how to adjust the accelerator pump timing on a FCR carburetor. The timing screw can advance and retard the pump shot. I adjust it until there is very little play in the system. - แนวปฏิบัติและการใช้ชีวิต
probably one of the most informative and easy to understand creators I have watched
This is a perfect instructional video for setting up the Keihin AP. Thank you!
This is an awesome video! The temp fuel setup to show the fuel delivery difference is great. Thank you.
This was very, very good. Taking the time to show over, under, and well adjusted, both from the mechanic's point of view and in action, is gold.
Thanks Kyle!
Thanks man. I definitely learned a lot on these types of carburetors. Since i was used to bikes with no AP's Thumbs up man
Thanks man, I'm a novice to carburetors and that was well explained.
You made my day awesome today. First YT video i opened. Answered my question instantly. THANK YOU SIR. Coz i just bought an old YZ250 ‘06. My very first dirtbike. My 11yo race on his 65cc ktm. 3 yrs now, I fast paced learn how to fix and maintain this lil ripper. I dont have a deep pocket, so we have to rely on diy.
Now i got me a dirtbike so i dont have to watch him ride anymore.
I tore down this yz already twice, to clean and learn the bike inside out. I noticed this o-ring wrap around that accl pump adjuster. And YOU sir just gave the answer. THANK YOU VERY MUCH FOR THE DETAILED EXPLANATIONS in regards to this part of the carb. Your lessons are priceless. Buying you a dozen of beerz still priceless. Have a great day.
Great video !!it was very helpful in my wr450f.. Best regards from Argentina
You are the man, between this video and the fuel screw video I was able to dial in both my 450r and my wife's 150r. THANK YOU!
No prob!
I did this with an 06 crf250r I bought for nothing , none one could get rid of the bog . worked 100percent . bog gone runs like a beauty , great video thanks .
Just want to say thanks for these awesome instructional videos I appreciate your work 🙏
You are literally the only person that makes sense on this topic, I have a crf150r and I had problems with bog and I tried everything. Just until I found this, I tried and it my bike runs 110% better. Thank you dude. Really thank you
Glad it helped.
Two years later and you are still helping motorcycles, my scooter now accelerates a bit better thanks to you haha cheers
Yes! I was about to ask, what happens if I set up the carb as shown in this video, but my idle is not setup.... I have carb off the bike atm...
This was super informative! Many thanks for sharing this!
My old Husaberg FE450 liked this.
Im doing this on my gf's husaberg right now😇
@@myran_moto330 y
Thanks Matt.
My 2004 wr250f has always had a terrible bog in the throttle. After watching your video and following your steps and adding the o-ring it has made a huge difference!!!!
No problem. If you are looking for an even bigger difference, throw a smaller leak in there.
Great video on a much overlooked topic. Thanks, man. Good work!
Thanks!
Ur the only one who helped me
Well done video. Probably the best one I've seen.
Very thorough video man. Thank you. Liked, saved, and subbed.
Bro I was fighting my 05 yfz for hours before watching this video. You are the man thank you so damn much.
thank you! i just rebuilt a crf250 and this was the one thing keeping it from starting properly. went from 50 kicks to 1 with one small adjustment!
I recently bought an 05 crf 250r, hard to start as well, but runs good, checked valves, they're in spec, spark plug and air filter look good, next is re-jetting, and I suppose I'll check my accelerator pump as well...Didnt know that could be out of adjustment...(my first dirtbike) wish me luck...
@@John_Doe_6996 good luck! just an fyi now that mine is broken in, i had to do another valve adjustment. everything has to be perfect on these motors for them to start easy appearantly. but at least they'll run forever haha! p.s. try a smooth kick from top dead center instead of giving it all you got. seems to like that better
I was having crazy bad bogging issues on my 11 ktm 530. Managed to adjust the slop out of the ap using the adjustment screw. Had to look carefully at where the rod that presses the diaphragm sits in the black plastic arm. You can see the slop and find where it is no longer pressing the rod down at all. Absolutely rips now no bog from idle while riding. I am also using the thick o ring from the JD jet kit. Worked great for me without removing the carb from the bike. Only the seat and gas tank.
Awesome! Definitely needed this video! Running into this problem with the yz450f at the moment…
I subbed! Great video, I wish every video was as on point as this one
This trick fixed my issues thank you
My guy. You saved me and this headache. Thank you for the great video.
Thank you so much for this. AP pump timing has always been gypsy magic to me and I've been living with the Honda bog for ages. No one really has a good video of this until now so thank you lol
No problem. I hope I simplified how to set it up.
@@HTMR Hi Matt. What if you have inline 4 carbs and carbs 2, 3, and 4 squirt gas when you actuate throttle, but carb 1 doesn't? Keihein carbs on an 82 honda 650 nighthawk. Issue with accelerator pump? Or perhaps a clog somewhere?
@@jrich240h Nozzle is probably clogged.
The o ring hack did the trick!!! Thanks man!
FROM DA BIG ISLAND THANK U SO MUCH YOUR VIDEO HELPED ME SOLVE MY PROBLEM I HAVE A 05YZ250F AND WAS REALLY WAS HAVING A REALLY BAD BOG NOW BIKE IS MINT GOD BLESS AND MAHALO AGAIN😉😎🍒🤙
You deserve an award for humanitarian aid. Thanks again
Fantastic video. Thank you for taking the time!
Thank you! I had the o-ring on but I jumped to a QuickShot, JD kit and different jets, trying to get the bog worked out. After watching your video, turns out that screw was so far out, I was only getting 1/2 a shot of fuel. I adjusted that and got immediate results. The QS, JD and jets did absolutely nothing when I adjusted them. I have a Rekluse auto-clutch and the bike is idling low. I turned up the idle and that contributed to it being much snappier as well. I believe a Rekluse can magnify the bog problem. Thanks for taking time to post this.
Your welcome!
Y a auto clutch man u yankys man its all in the clutch mate trust me i rekon its cheating definatly in enduro clutch for me on anything car n bike
Thanks a lot mate, you deserve a billion likes.
Thanks!
Great, exactly what I need for my 09 yz250f. I'll try it tomorrow
Cheers mate . Your a legend
Shout out from brazil
Awesome, thanks! I have this problem ond will fix it tomorrow!
Bravo Matt…Another classic!
Thank you so much for helping with theese carburetors, sub for you!
HUGE THANKS.NOW MY BIKE RUNS AMAZING.👌🙏🙌
Very clear instructional video thanks. I'm looking to upgrade my z400 stock carb that's jetted to a fcr style currently running a 170 main and 75 low jets with a Yoshi pipe and stainless header she does good now but I want little more for the hole shot
Straight to the point! Thanks Bro.
Fixed my bike so happy thanks mate
Thanks really much for your video!!
I gonna try to make this simple mods in my wr250f and kill the bad effect of the bike die when accelerating fast
Great! Keep it up!
Beautifull video mate! !!!! Many thanks !!!!!
Thanl you so much for the valuable info you provide us !!!!
Very helpful, thanks for a great video!
this helped so much. Thankyou!
Thanks needed just this kind of information...well done...well explained
Your welcome!
Thank you so much this made my day
Merci pour l astuce
Ça fonctionne au top
thanks for the tip it works at the top
🤙
You saved my life!
mate....cheers for these vids....bloody awesome...keep it up...some of us get all the info needed...even with the lighting or whatever lol
Haha thanks for the compliments! I think the lighting was off only in the intro...but who watches that anyway, right?
VERY INFORMATIVE! MANY THANKS!!!
Very nice video! Gonna try on my 05 wr 450f
thank you for the well explain video!
Nice clean explanation, thank you very much!
Should I plan on putting a new diaphragm on my 06 yz250f? How long do they last?
Take it apart and inspect it. If original, then yes replace it.
Timing looked good but very short squirt. Changed out the leak jet to a 40 and the bog is gone! Thanks for the video!
Excellent vid! Thanks!!
Excellent video!
Thank you man :) you helped me so much :)
THANK YOU SO FUCKIN MUCH!!!! this is a ****** MASTERPIECE!!!! i tried almost every place on earth to calibrate my accelerator pump but nowhere was this clear as this vid!!! MAD PROPS TO YOU MATE!
Your f***in welcome :)
Great video!!! 👍
excellent video. your a pro man.
Great video, thank you
Great video. Thanks!
Great video thanks!
Damn, super great video!!!! Thx a lot!!!
Wish my Mikuni TM33 had some apump adjustments on it. Quick opening the throttle like you did has a stutter, and then acceleration kicks in. I'll have to look it over.
Thanks for the video, helps a lot. I have a Husqvarna SM610 (600cc) and my carb is Keihin FCR MX 41. Do you know if I change the OEM leak jet for the 45 size that you mentioned , it will works for me???
Good video production.
Thanx for the big help!
Good information to know. Thanks!
nice vid, i appreciate.i like it how you keep it simple and load it with info,you know other channels all seem scripted and have same old info repeated and sometimes more about the presenter.could you know a thing or two or anything about stators?especially winding lighting coil on to stock stator of a dirtbike?
There are companies that will add a lighting coil. It really depends on year make model and if there is room for one.
THANK YOU! This is the only vid i can find that explains verry clearly how to adjust the accelerator pump! My bike runs perfect now✊😀.
How do you adjust accelerator pump I am rebuilding carb bike starting without choke
@@amandagregg2195 take the black plastic cover of that is on the right side of the carb. And then just turn the adjuster screw to when there is almost no play in the arm. ( the guy in the vid made it more clear then i can do, sorry😅)
Great video, thanks
Wow, thank you so much!
Perfect! Cheers mate👍🏽
Very good video thank you
Thank u. My Wr400f is happier now. And so am I
This is hands down the best video on getting the accelerator pump tweaked for maximum performance. Getting that “play” - “slop” is the key! And the Oring is a must. I would also recommend the shorter post diaphragm and smaller leak jet. My crf250r acts like it’s fuel injected.
Yes, I always use a 45 leak. Haven't had to tweak the posts as of yet.
The kits are available at CRF Only website along with instructions. I prematurely ruined the original on my Accelerator pump with carb cleaner😏. Found the CRF Only kits to be a good buy. I’ve picked up two over the years.
Spiegato molto bene. Grazie
thank you so much man
Kudos on the tip
Thanks for video! :)
Perfect video
I'm having to remove my carb to find out why my plastic black idol screw won't turn and while it's off in definitely going to be looking at and doing it if it's not already set up. Thank you
You the man!
Mate you should upload more often !!!
Trying! I have a full time job and 4 kids. Need to hire someone...LOL.
What size main jet and pilot jet would u recomend? Great video thank u!
Great vid. Having a hard time figuring out a lean condition and decel popping on my crf 450x. Have to turn the fuel screw out more than 2.5 turns to make it run right without popping exaust or glowing header pipe. Pilot jet is a 60, main jet is a 175. Air box has been opened up and has a fmf pipe. Any advice on what to do to tune it so I can run the fuel screw 1.5 to 2 turns out without the exaust decel popping is welcomed.
You need to richen up the pilot jet. However you already are at a 60??? That is pretty big. Check for vacuum leaks and make sure hot start plunger is clean and operational.
This is a commonly overlooked thing on a modern 4-stroke mx bike with the Keihin FCR-MX Carb. Pretty much all common bike brands use a version of this carb if it's a 4-stroke high performance bike. Very easy thing to check and will minimize if not eliminate any off-idle hesitation or bog. Highly recommend ALL of you to do this inspection. (this as well as clean your dang carb every once in a while - and inspect your pilot jet for blockage - AND never never never use standard ethanol-based pump gas. (Because it can clog your pilot jet over time.)
Where do you get non ethanol fuel?
@@bikersoncall yeah exactly that's the problem 😂
Tomorow i will try, i hope it will work for me.
that was really helpfull. thx
This is a great video and I love watching your expertise. I have a 07 yz250f and as soon as I did the o-ring mod it started bogging badly. I took the carb off and my ap arm has no slop in it without the throttle cable rigged up whether it's screwed all the way in or not. Should I just set the timing after it has the tension from the throttle cables?
Set the timing after idle has been adjusted. Oring must be removed for this.
@@HTMR thank you for your reply!
THANK YOU
Thanks for great video! One question, you say squirt time should be 0.8-1 sec, but in you video it's about 0.4 when you say it looks good, so what should I aim for?
Just did this to my carb on a 06 250x fixed most the bog issue I had once warmed up and ur going u couldn’t tell no more. Plus jd jet kit
sorry for the late post, great video, crf450x ap pump its working ok but squirt duration is too short, i have the o ring mod and the squirt timing is fine. how to improve squirt duration? bike bog on wot and then recover really hard.
Take a look at the rivet length on bottom of diaphragm. If you have a long rivet, you can grind it down to increase duration.
Thanks man!