My valves were so bad out of adjustment and I didn't know u had to adjust every20to25 hoursbof trailriding according to how hard you ride it we roll on on the trails but not at high rpm we mostely hillclimb that's were I put some rpms to it and that's about what my has on it I bought it in 07 off a guy that rode it once and broke his ribs after he got I was so used to a cr250 that I didnt like it. I rode it once or twice a year but this year I found some buddis to ride with and I love it now, it got hard to start and I read up on it and the valves needed adjusting so I figuerd why I was in there I would put a stage 1 hot cam in it and also put a powerebomb header on it and q4 muffler. I rode one time sinceand I hadntvrode it with so much power after I got done in a long time. Could anybody tell me how much dfference it has made. Thanks