Well i tore it down beacause i broke a piston skirt .Too much clearance between piston and cylinder is my guess . And when i got it apart i noticed the crank was separating ...so ended up tearing it all apart . Also notice there was one teeth missing on the clutch basket and that big chunk was no were to be found. Just seems to be one thing after another . Anyways mods are fmf sst with powercore 2 ,k&n pods with outerwears , tors removed, coolhead 21 cc domes ,timing plate +4 .