I posted this in another thread but didn't get a response, I could use some ideas for where to start. So, today I finally bought a YZF! I think I got a pretty sweet deal on it. It is a 2001 with a hurricane kit. The guy said I could ride it, but it was not starting. Supposedly it was running before he put it in storage 7 months ago. It doesn't build as much compression as it is supposed to. Its hard, but I can kick through the stroke without the decompression lever. I figure either piston rings or bad valves, any input? Oh yea, I paid $800. I will order a clymer manual tomorrow, and check the valves this week. I know the clean the jets, fresh gas, and new plug routine, but I need help on diagnosing the compression problem.