Wiseco 4903M10200 06-14 Yamaha YFM700 Raptor/07-13 Grizzly 111 Piston KitWiseco 4903M10200 06 14 Yamaha YFM700 Raptor 07 13 Grizzly 111 Piston Kit The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high performance 4 strokes. Today, Wisecos forged 4 stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding,