Yz 125 2001. hi i have rebuilt the the top end on the bike and all seems to be fine with compression etc. Now attempting to make the first start the bike wont fire. there is fuel coming out of the overflow pipe of the carb after every kick. checked for spark and its working fine. any help please. thanks
Kinda sounds like your needle valve is sticking in your carb and it is giving it to much fuel
Did this help you out?
Now i had the same problem with my bike a few weeks ago. Got 3 of these bikes and this one always does this after a top end build. Got spark, fuel, loads of compression but just wil not fire. The other two bikes start up fine every time.
Solution, towed it for about 100 yards with the Van and boom, off it went. Let it clear and settle down for a while, then shut it down. Let it cool and it fired up first kick no problems. It has fired up first kick everytime since. Weird one, but always does this and still never worked out why.
Mista B.
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dont give it so much gas if the choke is on just kick it or maybe take your carb off and set the float right
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