(smithabusa @ Jun. 14 2007,00:02)
(Cloud9 @ Jun. 11 2007,09:58) I know they say the pistons are good to 420HP, but I would replace them anyway... The stock pistons seem to give up easily if everything is not perfect.
I made 460 hp on stock pistons. Only times on the dyno, but had the bike at 22 psi or so in the upper gears on the street a few times. Most of the time run 16-17 psi on high boost.