Jump to content
Sign in to follow this  

KX85 Cuts out under load

Recommended Posts

i just rebuilt a kx85 and when you rev it on the stand it revs up good. when i ride it it cuts out reallllly bad at full throttle and gets worce the longer i ride it. untill it hardly wants to run at low rpm. when i put it on the stand it will rev up fine though. It is not the power valve i watch it work and the dots are lind up i cleaned the carb jetting is good. the stator and coil are in spec. does anyone no anything??????

Share this post


Link to post
Share on other sites

might sound ovbious and dumb but make sure the spark plug cap is good, and isnt loose or spinning aroud freely on the plug.

Share this post


Link to post
Share on other sites

Since you checked the most common mistake, I would have to guess something more internal. Maybe a leaking headgasket. The head might be warped and you're getting a slight leak or compression loss as it warms up.

Double check the head nuts torque. Also, if you used a Cometic gasket, you may have it upside down.

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

Reply with:

Sign in to follow this  

×