Report "I have a 2004 yz450f and am having a hell of a time getting it to run right. I checked all of the resistances on the electrical system and they are good, but it doesn't seem to be getting a strong spark. I can push start it, but it will only idle and when I give it fuel, it bogs down. I wonder if the CDI box is fried, is there any way of knowing if this part is bad? The timing is dead nuts with the cam marks on TDC and I have brand new valves, springs, and just had the head refaced. If anyone knows what I can do, please email me at [email protected] Thanks a million!!!!"