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View Full Version : What size Piston do i need?



300excrazy98
11-03-2006, 01:09 PM
When i measure the bore of my cylinder with my , dont know what its called, caliper something, never the less it measures exactly 66.0412 at the top at the bottom i get 66.0421

The story is, i bought this quad from some guy that didnt know much about it other than what was in the bottom end. I got it for really cheap and am now trying to make everything right on it.

Sooo it had a 0.030 pro- x piston in it that is beat to ****, rings shot, but the cylinder is fine

With the measure ments that i took, i would to my self could this be the right piston...? Then i asked my dad and he really doesnt know much about these pistons and what not. all i know is that the measurements are 100% CORRECT

So please share your opinion with me, what size should i get??

kiesta00
11-03-2006, 07:20 PM
You can get it bored/honed for around $50 and get a 66.25mm piston...or do you wanna keep the bore you have now? I'd get a bore job just to freshen it up