Kohler pistons or aftermarket Kohler pistons are cast therefore they should have silicone in them. typically in 2 strokes like snowmobiles, atvs, ect.. you can fit the piston pretty tight. like .002 to .004. I always thought Kohlers spec was to loose. I'm not sure how they get that number, if they look at length of running time in excessive heat situations or what. I've gone as low as .005. typically I hone to a tight .007 so that's probably a .006 to most people. everyone has a different feel so if you start going outside of the box do so a your own risk. I figure less piston rock the rings should last longer. using forged pistons in a Kohler block we typically .go 003 to .004 depending on the brand of piston
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