Well, bought a used '00 650R from a friend last spring and rode it all summer. The bike ran like a swiss watch and pulled hard but never having a valve adjustment I thought i'd tackle it myself. Did a search on this forum and Off-Road.coms article and it seemed easy enough in theory. They seemed a little tight, couldn't get a .15mm in the intake or a .20 on the exhaust. So I loosened them up a little, so that the feeler guage would drag a little and was all proud of myself. Put it back together, went to fire it up and voila'! Nothing. Wouldn't start. Normally starts 2nd or 3rd kick when cold. Jump started it in front of the house and it barely ran, sounded like a sewing machine, missing parts, going through a cat. Question is, are the valves that sensitive to adjustment? My feeler guage jumps from .15 to .18 so even though they recommended .152mm for smack in the middle of tolerances I used .150mm. I'm tempted just to take it to the dealer and let them do it, not sure how much "drag" is enough. Any ideas would be greatly appreciated!