ok i am wondering is a 6mm stroker crank bad for the bike?? its bored 86mm over well i guess i should tell u the engine its a 350x engine bored to a 393cc and ported polished 11:1 compression, bigger valves and intake and exaust put in it and a cam put in the bike also.. oh the valves are titanium valves and springs well i need to know if the crank would be a good idea! thanks oh its strokes the bike out to a 430cc bike...