- Manufacturer: CP-Carrillo (CP Pistons)
- Vehicle: Yamaha YZ250F (2005-2013) & WR250F (some models)
- Type: Forged Aluminum Piston Kit
- Bore: 77mm (Standard)
- Compression Ratio: 13.5:1
- Stroke: 53.6mm
- Includes: Piston, rings, wrist pin, circlips, and often a heavy-duty connecting ro