WISECO 69.5mm FORGED PISTON KIT YAMAHA YZ250 1988-1991

Part No. 56-W605+150_WI
Wiseco Pro-Lite Piston Assembly �Durability, longevity and increased horsepower �Innovative forging design and piston skirt provide maximum horsepower and torque �Lightweight wrist pins enable faster revs and quicker throttle response �Power Valve must be modified for .040 and larger

�1991 model is Ceramic Composite-Cylinder sleeving or replating required for oversizes �Top-End bearing available-part no. B1014
Included Items: One 69.5mm piston Two 2736CD rings Two CW18 circlips One S508 wrist pin