Old Dirt bike
#1
Old Dirt bike
Wasn't sure which part of the forum to put this in (maybe OT?) so I'll just ask you guys. I have a 10 year old dirt bike, it's a little 125cc. I can't get it to stay running. If I spray the carb with b-12 cleaner the bike will start up after a few kicks. But no matter how much throttle I give it, it won't run for more than 5 seconds. Any suggestions?
#2
What kind of bike? I raced motocross from when I was 12-19. Best sport in the world hands down. But thats all going to go down the drain with the new lead ban....
As for your problem make sure all the jets are cleaned out and give the whole carb a good cleaning. Make sure it has good gas. Old gas can clog a carb and make it hard to start. Check the plug it may be fouled as well.
As for your problem make sure all the jets are cleaned out and give the whole carb a good cleaning. Make sure it has good gas. Old gas can clog a carb and make it hard to start. Check the plug it may be fouled as well.
#4
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Did you clean the jets? Try cleaning the jets, new gas, and a new plug. If she doesn't fire, it may be the head gasket. Which unlike in vehicles, is cake to change.
Also try pouring a little gas in where the spark plug goes. If it runs for a bit, basically until that runs out that can tell you its somewhere in the carb/gas.
If after all that fails, you will have to look at your rings and piston. The nice thing is this is all real easy and cheap on a 2 stroke. Once all motocross bikes changed over to 4 strokes the sport got too expensive between the fact that parts were 2x as much and 2x as much mateince is needed.
Also try pouring a little gas in where the spark plug goes. If it runs for a bit, basically until that runs out that can tell you its somewhere in the carb/gas.
If after all that fails, you will have to look at your rings and piston. The nice thing is this is all real easy and cheap on a 2 stroke. Once all motocross bikes changed over to 4 strokes the sport got too expensive between the fact that parts were 2x as much and 2x as much mateince is needed.
Last edited by bpark8824; 03-23-2009 at 10:35 PM.
#7
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#8
check the pitcock.....hum i sure hope i spelled that right....thing under the gas tank that turns fuel on and off and resever. and check fuel filter if the bike has one
o and if the bike satup for say over a year or 2 with gas n it. you have to replace all lines clean out pitcock vaule and clean out the carb. jets in all.
o and if the bike satup for say over a year or 2 with gas n it. you have to replace all lines clean out pitcock vaule and clean out the carb. jets in all.
Last edited by jar1zx; 03-24-2009 at 12:28 AM.
#9
#10
Go to the Yamaha website and get help there. You do not have an issue with head gasket or rings if it starts, they may very well need to be replaced, but if it starts on a spray, thats not your imediate problem.