The RM125 is RUNNING! But We Have a Problem
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- Hey Guys, Migs Here! In this video, I am Putting back together the engine. Filling up the bike with all the fluids and attempting to started up for the first time in a while! But when it fires up we discovered a problem that it has running. Thanks for Watching! Please Subscribe, Like, Comment and Tell Your Friends About the Channel!
Honestly you should buy an entire new carburetor because that carb is going to make that bike blow tf up 😂
big fax bruh lmaoo
Lightning 12 yeh bro and that bike got hella problems already
The reason it runs good on choke but fast off choke is because it's too lean. Choke has a richening effect.
yes! you are correct.
Second this comment you will blow a bike up if it does this. Reset your float and check your carb, especially your pilot jet
That thing is running major lean. You will blow it up if you keep running it like that. If cleaning up the carbeurator does not fix that it is definitely an air leak, Either a gasket/seal is not sealing or something has warped. Spray some starting fluid, carb cleaner, or wd40 around the engine and if the revs change, you have found your leak. It could be the base gasket, head gasket, case seal, or crank seals. I doubt it would be the crank seals since it is a freshly rebuilt engine, but Id also check that you didnt warp anything such as the cylinder or head(which i doubt you did, but still something to check.) But before checking for air leaks i'd clean the carb cause the jets could be clogged not allowing enough fuel through causing it to run lean. Hopefully it is just the carbeurator and not an air leak. Hope you get it fixed soon!
icantcomeupwithaname never spray soap water on a intake leaks that’s just as bad as running your filter wet use carb cleaner or start fluid to find a leak lol
John Nickle Good point lol just edited it
What he should do is pull the engine out and leak test it.
Zane Zinn, if i were him id try cleaning the carb first, then if that doesnt work, then id leak test it.
i bet you that its an air leak either from a crack in the air box boot, carb intake boot, or just to small of a pilot jet
You don’t need to give it gas to start it while it’s cold
That coolant bottle said concentrate.. I hope you mixed it 50/50 with water before putting it in the bike..
Knowing him I'm guessing he didn't.... I was also thinking the same thing lmao
Yeah
LEAN LEAN LEAN LEAN LEAN LEAN LEAN LEAN LEAN LEAN
Lean is the best way to kill your engine especially in 2 strokes as they use gas premix to provide lubrication so when it's not getting enough gas it's not getting enough lubrication
You have a air leak in the boot that goes from the carb to the reed it’s letting air in causing it to run lean and rev up the hose clamp might have cut its way through the boot at least that’s what happened to my dads 89 rm 250 of course in the middle of a trip to West Virginia 🤦♂️
Yeah it sort of has symptoms of a vacuum leak, revs come up when choked... You probably are right.
you have the wrong size needle for the seat
Yeah you might use gasket maker on your small engines but you should use real gasket for high-powered dirt bikes
Yeah😂😂😂 because an old ass rm125 has so much power
Blake MacRae yes small motors are nothing. Them dirt bikes with alot of power will not take it.
People use gasket maker on cars
you need to put the rest of the plastics on and the seat because it is running lean with the air filter being exposed that is your problem ( i tested this theory on my own bike to make sure it was correct and it was)
Dallas Jensen glad you said it. Wow. Too much air!!
Dallas Jensen exactly what I was thinking was the problem
Yes, that would make it run a tad bit leaner, but not that lean! You'd expect this type of lean from either an air leak, or too small jetting/clogged jets.
now that I think about it you might be right he probably needs to replace that air filter because it looked to have a pretty good rip in it or just a carb problem
That's silly. With or without the plastics that air filter is drawing in the air it needs regardless. That's like saying you can't breathe as much with a cardboard box over your head compared to a room. If the air filter is clogged that's different.
Can't wait to see u rebuild the whole dirt bike 💯
The slide in the carb are stuck
Evan Hord hd
No it's not
Please stop saying driving 😂 it’s riding lol. Nice build tho
177 Media no driving is a term meaning its working by riding means I’m riding on a trail u dumb fuck
177 Media thank you
Brady Moeller what
THANK YOU!!!! I thought that I was the only one that was getting seriously triggered.
Kyushka no u mean running
You need to change the spark plug and get a new throttle cable
Buy a new carb or get a carb rebuild kit
Angel Perez I believe he already had that carb rebuilt not too long ago.
Angel Perez he’s had it rebuilt already that’s what the shop said it came back dirtier then it went in 😂
Lube your throttle cable and also it seams lean to me
She's running lean either intake leak or jetting issue
I’m glad it’s running, you’ll get the problem fixed soon man. Almost there!!
Oh and try tightening the fuel air screw then turning it left two turns go from there left lean right rich
To lean
yeah
Might as well get a new carb
Seats off gotta remember
I think half the reason its running so shitty is because of your air box you might have a vacum leak plus the thing doesn't even fit the bike properly
you used way too much gasket maker
he should of put the old gasket back on
dirt-rippers 101 yeah with a little of gasket maker where it ripped
Sam Fricke That's not a issue.
Giving it gas while choke on???? yikes
Stop twisting the throttle every time you kick it
I like the long videos
get a new carb or fix your jets in the carb I had a 96 yz250 that did that make sure your throttle cable is not pinched
Don’t bump start it if it’s stuck open I learned that the hard way lol
FORTY TWO FILMZ same here
You need a new float valve seat gasket and needle, my 1984 IT200 did he same thing, made me too scared to ride it
you either have an air leak somewhere or you need to really adjust your jets because if you have warmed up your engine and it revs high with choke on its running lean
fix it up nice and buy a new bike
You have to put oil in the gas can then mix it
No shit sherlock
get a new carb they are only like 50$ on ebay
Check your pilot jet and your air/bleed screw. The pilot controls idle-1/2 throttle, and the main does everything else.
If you don't have a bunch of jets, buy some, they don't really wear out. If your throttle isn't snapping back closed, you might need to loosen the grip and move it outward a bit. Check for pinched cables. Lastly, be sure the slide is properly installed.
GOOD LUCK, you have brought this thing back from the dead, now finish it off!
I had that problem sometimes you bars are to fare to the right and I pulls on the throttle when you tilt check that it could be the problem
Jesus fuck. Everyone saying its a slide or carb issues needs to learn about a 2stroke motor.... that motor was built and never leak tested..... thats a ABSOLUTE NO NO in the 2Stroke world. U need a leak test ASAP! Or u will blow that bitch up in a matter no time. I highly advise u buying a leak tester.
Funny enough im having the same problem with my 1995 kx100. Its fine then all of a sudden bounces off the wall. My mixtures perfect (Ive used the gas in other machines that love it) and my carburetor has no problems that i know of. I knew it was to much air as well, just cant track where it is. Hopefully you and myself will fix the problem soon!
1) Find TDC and kick it harder
2) Stop opening the throttle unless the bike is flooded and you need more air to even out the mixture for start up
3) Tilt the bike Oberón the left side all the way over for a few seconds to put gas in the carb
4)Turn off the choke immediately after you start the bike
I’m 16 and I race 2 stroke dirt bikes so please take this advice it should help you a lot with your bike and future issues you might have.
Keep it simple: check carb for leaks, clogs, jetting, generally anything that does not look right and adjust/fix if nessesary. Then check for air leaks..
might be an air leak this happened to my cr125 check reed gasket.. all boots on correctly. may sound stupid but piston could be in backwards.... i would check all gaskets
Did you put 2storke gas !!! It's the float bowl needle. It's probably getting stuck from all the years of sitting. You might just need a new carb
Put on all the plastic. Seriously, that cuts down the air flow and will make it run better. Right now with the air filter exposed 100% to the open air it will have that high, hanging idle. Put all the plastics on, that way the air filter isn’t 100% exposed and is sort of “choked” on air. I was working on a buddy’s bike and if I would have the plastics off it would do the exact same thing. But when I put them on it didn’t rev up as high and was able to tune it out with the screws
@moto migs your bike runs wfo because of an airleak or lean pilot, look up jetting specs and order those jets and work your way down, better to run rich then lean, working your way down from rich is better as you will find your sweet spot in jetting, as for your gaskit maker job a very little bit goes a long way with building engines, a very thin film put on with either a stiff paint brush or a q-tip will work fine, then wipe excess off that you see on outside of engine case, it will look much better. Your in the right direction my friend as inwas in your boots at one point, brand new to dirtbikes which i thought was absolutely amazing and i still do, i race a 01’ cr125r to the rod and do all my own work from engine to fork seals, you pick up things the more you do it and i think by far jetting was the hardest for me because it would always load up and foul plugs and finding that sweetspot is very hard even with jetting soecs as it may be running rich with the called specs
Hey I need help with my 90cc repsol super pocket bike. I want to buy exhaust but don't want to water buying wrong type. Can you help with that
I had the same problem with the throttle being sticky, make sure you grease the bar and throttle cables, also spray a tad of WD-40 Inside the throttle tube and it’ll be snappy 👍🏽
You seemed pretty scared of that bench grinder 😂 it wasn’t even going fast, I think there’s something wrong with it 🤷🏼♂️
buy a new carb and clutch basket. you could be having the shit issues with the basket being torqued down on 4 bolts instead of the five that it should be, just built an 88' rm250 and had the same issues minus the scuffed clutch basket. lol
heres whats wrong, too mutch gasket maker, possible air leak, 100% carb spring air fuel mix and maybe throttle tube. i would look at a newer carb though as technology has progressed a bit
Dont keep running your bike like that , its running SUPER lean , you'll melt your piston really fast if you leave it like it is , its sucking air from somewhere , or its the carb itself
Like the vids man! But easy with the gasket maker. I like to put a little bit on my fingers and smear it all around and add to the finger here and there and just do a thin layer with maybe even the old gasket (or new) just to help and always make sure to wipe away any excess that looks to be on the inner edge of the cases where they mate. Really don't want any of that smooshing down especially with how much you put on it'll smooth alot and could always end up breaking off and going somewhere it shouldn't. Keep it up it'll be a beast soon!
like every body told you, the bike is running lean, try to clean the emulsion tube, maine jet, ferify the screen in the fuel inlet, check you float hight. try to presurise your crank case, plug the exost port remove the spark plug and put some presure inside, less than 1 bar, the pressure should stay, if not you probably have a spy leak or anything else.
spary some carb cleaner on the carb to cheak for leak.
rtv kill bike by cloaging the oil screen inside the engine, your bike is a 2 strock so not that important.
That is WAY to much gasket sealant. You`l have big globs of that shit floating round in your oil, clutch and bearings. Not good,
And if the bikes running so much better with the choke on. you dont need to be Albert einstein to figure out that the bike is not getting enough fuel. please start searching for the reason to way it is running lean, or you will end up with a blown top end.
Bro thee problems you have are all simply solve able in ONE video. Who the fuck takes this long to rebuild a bike. This is the worst build my fude
I just read that you already had it rebuilt so that rules that part out. Honestly, the next step, I would be checking your throttle and throttle cable to make sure they aren’t binding in any way. That throttle should be snapping back.
You need to buy a pressure plate bolt and spring it will run like poop because the clutch is slipping I had to do it on my 1984 cr250r
Check the throttle at the engine. Where the cable meets the engine. That’s your problem. Something would’ve come loose/out
Hey migs loving this built so far but it sounds like to me the spark plug it fouled. If that doesn't work the stator might be stuffed Couse that's what happens to my bike.
You need the airbox sealed. It is tuned to run sealed up. Just pulling the side cover off my bike (ktm has side cover over air filter ) and the bike dies. Causes it to lean out
You either have an air leak or your throttle cable is catching somewhere. Check to make sure its routed properly and not catching under the tank and make sure it slides freely in the carb. Also double check for air leaks. 🤞
Why wouldnt you put the gasket on?😂 just because its ripped doesnt mean anything, put gasket maker where its ripped and make sure it dont leak
Not getting enough gas it’s acting like it’s thirsty rebuild the carb do after do the idle and air screw and check the throttle line and run 91 and mix it 40:1
Running too lean. I can’t remember, but was the air filter pre-oiled? If not, you need to do that ASAP. That could be causing a lean running condition. If it’s not that then probably an air leak.
Try your spark plug mine 96 rm125 was doing that and i change it completely stop doing that
My yahama blaster went lean and reved up really high plus my kill switch didn’t work your when it reved up bike is running way to lean that was my problem
Hey dude, I had an old honda 2 stroke and it had the same problems, I would say to get new reeds and clean the carb, that's what fixed my bike that had the same exact problem.
Its lean toy need to rejet or get a different mixture try 50 to 1 thats more fuel which is richer if that don't work get a bigger pilot and if that dont work it's your needle position move the clip down which is richer
Find your air fuel screw on the carb. Look up the stock settings basically how many turns out it should be . After you have that number from were it is right now count how many turns you go in and see if your at the right number for turns out
Just do a carb rebuild, something wrong with the slide I reckon. Clean out the carb and rebuild it. Should be sorted!
I have to agree with angel. I would try rebuilding the carb first since that is cheaper then buying a new one. It’s not hard to rebuild those carbs. I would spray carb cleaner thru all the ports in the carb when u have it apart to make sure they are clear and free of any deposits.
Please please check your jetting like one of the guys said in the comments the reason you bike runs good on choke bc it ads a richening effect so your bike is running way to lean you will blow it up if you don’t fix this
Looks like your pin and bottom of the Rev cable is getting stuck in the carb 🤷🏼♂️
Your float level is high why it’s idling high even with the screw down and bogging because it’s not getting right air fuel mix adjust the floats
carb is junk. Just buy a new one it's not worth the time fixing that one. it's clearly pretty junked.
you probably have an air leak. to test this you should spray some soapy water on the intake boot and on the boot that's connected to the air box and if it starts bubbling a lot while it's running it means there's an air leak. if it's not that then your carb slide might be stuck or something.
It’s not the fuel it’s the carb if your bike bogs it’s your carb not fuel lol
biggest rookie mistake: if you put a new chain on, don't put it on old sprockets, cause it will insanstly wear out the chain cause the teeth are rounded on the sprockets. so put in on all in one go.
You really shouldn’t have cut the chain, now who knows if it will fit the bigger sprocket that came with the chain.
I wonder if the problem is that the bike hasn’t been tuned with the right jet for the v-force reeds, pulling in too much fuel for the current jet.
That’s running super lean. Rebuild the carb yourself. The shop you gave it to did a shit job.
Maybe fik your throttle cable it's supposed to be going from the tube to the number plate and then in between the shocks to the carb How you have it now doesn't make it look good
Dude don't use car anti freeze in a 2 stroke LOL. You're supposed to use Engine Ice motorcycle coolant or something similar.
I had the same problem as you when it revs high like that it is an air leak I bet 1000 dollars it’s the reed cage gasket the same thing happened to me try the gaskets it’s getting air through time of the gaskets alouing it to rev up
It runs way to lean but maybe put on the airbox so you dont allow it to suck that much air because it doesnt have any resistance without the box which allows it so breath a lot more air. Then that screws up the air to fuel ratio.
You do realise that when you starve a 2 stroke of fuel the engine isnt lubricated so it could easily cease up. You could have put the choke on and it would have cut out👌
this kids skipping too many steps and rushing the ones he has done if he went to a good mechanic they would have told him to buy a new carb before rebuilding it
You use way to much gasket glue.. you honestly only need a thin layer man.. but bloody dodge to don’t be a cheap ass and just buy a bloody gasket
check for vacuum leaks everywhere spray carb cleaner when it's running around the carb and intake
leave him alone u hateing does solve anything he wants to figure out the problems and work on it himself u don't learn unless you try!!
Your throttle cable is adjusted too tight Thats why it doesn’t snap anymore when you release the throttle. That snap is the slide hitting the bottom of the carburetor shitting off the gas so since its not doing that, the slide is up a bit and letting gas in
You need to mix your petrol an air right it sounds like there’s too much air been taking in think about it. Runs fine with the choke on so there’s to much air been takin in
Your carb slide is stuck and your gas pin onder the card slide is to high and you have false air between your cillinder and carb
I hope you mixed that coolant with water because that is not mixed. 9:23 you can see the coolant jug says concentrate.
It's good to have a good mixture for it if it is adjusted right
Check for air leak bro, check Carter key on magneto side, you may have sheared it if you didn't tighten magneto to oem specs
U need to adjust air mixture screw if that doesnt fix the problem you have an air leak somewhere
Not saying this is the problem but one thing you need to do is get a new throttle cable it’ll fix your throttle problem
Dude your gassing it up way to much u only need to twist the throttle once or twice not every time u kick it or every 10 seconds
At this rate id of bought a new bike, you’ve spent loads of time and money on it should have bought a good working one !
Vemix I think he wants to learn to work on a bike, not just buy a new one idk
Thomas Thibodeau honestly half the fun of having a bike is working on it for me, people are different, he obviously loves to work on bikes let him have fun
He bought the bike for the purpose of working on it, it's a build
What are you saying jayce ? I love working on my bikes no fun in buying a brand new bike lol
Sure he could just buy a better running bike but like others said he enjoys the challenge and the learning aspect..besides how boring would his channel be if we just watched him buy a new bike and “drive” it around his yard...haha.
Get some starting fluid or brake clean start the bike and spray it around the intake boot closest to the engine if the engine revs up its has a leak causing it to go lean
I hope you did a 50 50 mix of the antifreeze and distilled water and not straight antifreeze
First