- 10.5:1 Compression Ratio
- Bore Oversize 1.00mm
- 4-stroke
- Non-coated.
- Complete piston kit includes pistons, rings, wrist pins, circlips and top-end gasket kit for one complete engine
Wiseco Forged 77.00mm Piston & Top End Gasket Kit for '86-04 XR250R (PK1223)