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View Full Version : need help with yfz 450


quaddad#123
02-20-2007, 11:45 AM
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.
quaddad#123
02-21-2007, 01:01 PM
now, I changed the coil, cleaned carb. and drained the gas still not right. need some help!!
YFZ#426
02-24-2007, 06:31 PM
jetting
the Z Man
02-24-2007, 07:01 PM
Throttle positioning sensor?
the Z Man
02-24-2007, 07:02 PM
If it has been tampered with you need to tie the wires together..
yfzmx10
03-11-2007, 10:19 AM
Jeff,

did you fix this problem?
drgnerth
03-11-2007, 09:16 PM
Have you tried the headlights?
quaddad#123
03-12-2007, 07:16 AM
I got it, put the headlights back on and it runs fine. I ordered the resistor kit. THANKS