Hi, I've been reading everyones threads on cam replacement and top end work. Lot's of people getting ready for the summer as I am. Has anyone installed the weisco piston on their wr-426? I'm changing the piston only as I bought the bike (2001) used and I'm not sure how hard it was abused. The valves have recently been adjusted last month. Is there a noticable difference with a weisco piston? I felt the change in my yz250, not sure if it will be the same with a 4 stroke... When you are working on your engine, do you remove it from the frame? I'm still waiting on the Clymer manual before I start, but would like to tap your guy's experience for any tips before I begin. Thanks in advance!