There's no replacement for displacement! Pro-Tec's 727cc and 686cc Rhino big bore piston kits will provide the low RPM torque for racers who crave the holeshot and recreational users who want to be the king of the hill.
Pro-Tec's 727cc Yamaha Rhino big bore piston kit includes a centrifugally spun, centerless ground, chrome-moly cylinder sleeve, lightweight forged aluminum high compression 105mm piston kit.
*The 686cc big bore piston kit includes a lightweight forged aluminum 102mm piston, and bores into your stock cylinder.
**This kit comes with piston, rings, wrist pin and clips ONLY, gaskets and sleeve sold separately