alright, got a billet flywheel purchased and now, onto the rod. I just have two questions : do I need to do something about the stock piston, or can it handle 6-7k rpms? and then, the crankshaft.Should I upgrade to a forged crankshaft, or would a cast iron be good enough? I have never personally heard of a crankshaft failing, even on those predator 212s? any advice appreciated.