Got my baby all back together today. New crank, cam chain (much harder to install cams now ), 97mm pro-x, puttied head, new clutch basket. It's actially quiet! . I used the staock WR pipe for the initial start up (so I could hear the engine) and it was that quiet I could hear the slide rattle, mind you I did have the seat off. Feels pretty strong down low (YZ pipe back on now). Will finish running her in tomorrow. Is the FMF Q2 any good? or is the oringinal Q the best bet?