[img]i/expressions/face-icon-small-smile.gif[/img] Need help from the experts, what piston/cylinder wall clearance. What is the correct clearance on a '84 TRX 200. w/ Pro=x .010 over piston. HEEEEEEEELLLLLLLPPPPPP

 

.003 with an easy break-in, or .004 with a go-ahead break-in.

 

If your not using the stock piston, you have to check with it's maker. Different piston construction and materials cause VASTLY different expansion rates, in two different piston mfgs!! If it's a Honda oe, your putting in there, I usually fit them at .001 - .002 max.

 

Just thought I'd add, if your aftermarket piston doesn't include that info in or on the box, it's probably junk, don't even put it in.