quick question about boreing

[quads14589]

can you put in a .50mm piston into a blaster motor without having to bore out any of the walls or will it only work with a .25mm piston?

[honda300EXtreme]

any time you exceed the stock bore you need to bore the cylinder to accomodate for a larger piston

[headache]

yeah .25mm is .010" and it won't come close to fitting without boring.