Wiseco 4382M06750 67.50mm 10.25:1 Compression 234cc ATV Piston Kit Wiseco's forged pistons are tougher and more durable than cast pistons, and will stand up to the abuse that high performance motorsport applications require Piston kits contain one piston, rings, piston pin and piston pin circlips 2658XD ring set 234cc