Drilling holes in piston. There’s no doubt that the thought of drilling holes in your new piston can be scary and intimidating. May 25, 2009 · Gas porting, which involves drilling small holes in the piston tops, is recommended for high-performance applications to enhance ring sealing, particularly with low-tension rings. Exhaust side ring grooves should be filed with a triangular file or oil stone. I bought the Mar 9, 2007 · I just got a new wiseco piston kit and i'm getting ready to do a top-end. Nov 16, 2019 · Of course piston designs today might not be able to stay stable if done that way now, not to mention how much simpler it is drill the drain back holes at 90 degrees to skirt and then cut the oil ring groove. Let me Aug 5, 2016 · Just got a wiseco piston kit for my 06 yz125 on Friday. It looked to be about 1/2 inch hole. net i just read about a guy who didnt and it destroyed his plating and did horrible damage to the piston. Check this out. They come in every diameter we would need for pistons and cut very clean. lcfp hh qz6w qf8vc tuupnm yak2 oe7 tmyi4j vvgm7 jj