PISTON KIT 88-91 YZ250 70.00, WISECO 605M07000 FORGED

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 70.0mm piston Two 2756CD rings Two CW18 circlips One S508 wrist pin