I have a 04 YZ450 that i bought used about a year ago. It appears to be stock except for the flywheel.
I lost 4th gear a few weekends ago so I put my limited skills and tools to work tearing the engine down. There were a few hickups here and there but over all the job was fairly straight forward.
Now i have the engine back in the bike all it does is backfire every 15-20 kicks:thumbsdn:. I've checked the cam timing according to the service manual, I'm getting fuel, and I have spark. Is there a chance the timeing is off 180 degrees?
Help!! I have Friday off and I NEED to ride!
Thanks in advance,