Jump to content
Sign in to follow this  

Help my yz wont run

Recommended Posts

I while a ago i traded my 1986 kdx80 for a 1987 yz80. The guy who i traded with told me that it only needed a top end. Long story short he &%$#@!ed me over i put all new bearings and seals in the bottom end full top end from wiseco, a bunch of parts in the traansmition. Now i kick it over and the thing will start after like 10 kicks but will run like a 4 stroke for like three seconds and die. it has spark and stuff i cleaned the carb i don't know what the hells wrong with it. I thought it might be the timing idk. please someone tell me some good news been waitin to ride for 6 months

Share this post


Link to post
Share on other sites

If bottom/top end is fresh the problem should be fairly simple. I would start with carb tuning. What does your plug look like after you get it running? Jetting would be the first thing I would guess, a fresh rebuild can absolutely change things. Also the reed valve should be checked as well. I would bet my money on one of those two things. If not it may be a spark/timing issue.

Share this post


Link to post
Share on other sites

I while a ago i traded my 1986 kdx80 for a 1987 yz80. The guy who i traded with told me that it only needed a top end. Long story short he &%$#@!ed me over i put all new bearings and seals in the bottom end full top end from wiseco, a bunch of parts in the traansmition. Now i kick it over and the thing will start after like 10 kicks but will run like a 4 stroke for like three seconds and die. it has spark and stuff i cleaned the carb i don't know what the hells wrong with it. I thought it might be the timing idk. please someone tell me some good news been waitin to ride for 6 months

did you put the keyway into the crank ?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×