which piston do i do?

[EXDUNER127]

my yfz has sparks exhaust, cam mod, bored carb, esr intake.. want a little more before thanksgiving.. i am debating between a 12:1 stock bore piston or just going with an over bore since i will most likely get it honed anyway.. will there be much difference in piston size without a big bore? any one running same mods and know hp specs/

[atva_63]

get the head ported. it will give you the power you need

[EXDUNER127]

proting the head will do more yes, but i am doing the head with big valves and porting after newyears.. my engine builder is busy until then and i dont want to miss a dune trip! i just want a little more until then?