85 ATC250R .010 pro X piston clearance? (i think itcs called clearance...)

[phatcat600]

How much of a clearance and ring gap do I need? We contacted ProX but they wont respond.

[TTribaLL]

I don't know with that oversized piston, if you have a manual it *might* tell you you the gap for oversized pistons, or maybe its the same for all sizes.

[Lots_Of_Nothing]

smash the pro-x piston, get a wiseco, call them, they have much better quality and a excelent help service.

there's a reason pro-x pistons are so cheap :P

[phatcat600]

Yeah to late Im usin the Pro-X, anyone wana help?

[KASEY]

forged pistons need more clearance .0035 to .005 cast pistons run tighter ,
.0025 to .0045 ring end gap .009 to .020 all these are in thousands

[2strokepwer]

I use pro x adn had no trouble talking to someone on the phone about clearence. My cylkinder was bored to the piston and i think i had 14 thousands ring gap and left it at that.