how bif?

i ran into a problem with my engine. big problem.

so my engine building idea has changed.(busted parts)


what i need to know is how big of an engine can bs34 mikuini's handle with out having any problems.

i ride my bike high in the rpm;. it will have possibly k435 cams from ape. so bigger cams, 900 crank for sure. so 1200? or smaller.

need a little help on this one