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need help with yfz 450
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Posted by: quaddad#123

The problem comes and goes, it sounds like its breaking up or on the rev limiter and it only happens in gear. It happens even at low speeds. I switched the cdi and it seemed like it went away for a couple of weeks. Now its back, I thought it was the plug on the cdi but I cleaned it and made sure it was plug in tight. The motor was just rebuilt.

Posted by: quaddad#123

now, I changed the coil, cleaned carb. and drained the gas still not right. need some help!!

Posted by: YFZ#426

jetting

Posted by: the Z Man

Throttle positioning sensor?

Posted by: the Z Man

If it has been tampered with you need to tie the wires together..

Posted by: yfzmx10

Jeff,

did you fix this problem?

Posted by: drgnerth

Have you tried the headlights?

Posted by: quaddad#123

I got it, put the headlights back on and it runs fine. I ordered the resistor kit. THANKS