I have my 450 for a few months now. i can hear a little piston slap, not to big of a deal. I just bought a fmf q4 ti pipe, fmf jet kit, an quickstart3, should all be here early this week. I was also thinking of buying a top end kit (gaskets, cylinder,piston,rings, an wrist pin) i ride just about everyday after work. some roads, trails, track, a little of everything. my question is will i have any reliability problems such as over heating or decrease engine life. also I have spent many hours looking for a decent graphic kit for my 2002 bike an cant find any? Thanks!