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Kyle in BC
This piston has held up great. My YZ has hot cams and a hot rod crank and this piston completed my build. Bike pulls hard at all RPM's and has over 40 hours and still measures up great on the leak down tester. Would buy again if mine wears out but so far no need.Read All Reviews
MONTY in AB
I bought these for my Banshee since everything I read about them on-line was pretty good. The part nobody seems to mention on-line is that included in the box is the piston spec sheet advising you to replace the piston every 15-20 hours depending on CC of engine, there is a chart. Their Go-Kart pistons are rated 2 hours. Nice looking piston, but I can't afford new pistons after every long week-end of riding. Went back to OE piston, it made it 11 years on those. TECH NOTE: 20 HRS IS A PRETTY STANDARD SERVICE INTERVAL FOR A TWO-STROKE PISTON. ACTUAL PISTON LIFE WILL VARY WIDELY DUE TO RIDING STYLE, MAINTENANCE, ETC...Read All Reviews
DAVID in CA
Bought Pro-x instead of Vertex for the first time for my KTM 144sx. Piston was installed correctly into a good cylinder, synthetic premix, good jetting, heat cycles, etc. Piston scuffed and lost all compression after 15 min of riding. Installed the old Vertex (which was in great shape after 30hours ) and have been through 2 tanks of gas with the same premix and jetting, no problems. Pro-x said lack of lubrication and will not warranty. I will never buy their products again.Read All Reviews