biggest bore

[ericstam07]

what is the biggest bore i can get on a 250x i would like to try and get a 330 is that possible?? or somewhere around that?

[ethanp87]

i think you can get a 82.5mm piston from curtis sparks but you have to by a big bore sleeve or try www.powroll.com or four stroke tech for a 330 kit or gt thunder. the 82.5mm would be the biggest possible with out stroking it.