PISTON KIT 04-09 CRF250 HC 78, WOSSNER 8590DB FORGED

Wossner 78.01mm high-compression forged piston kit is designed for enhanced engine performance. Engineered for optimal heat transfer, it ensures efficient cooling of the combustion chamber. The elliptical design provides a uniform bearing surface, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany for precision and reliability.

Features

• High-compression design for increased engine performance
• Forged construction for enhanced strength and longevity
• Optimized heat transfer for efficient cooling
• Elliptical design prevents piston collapse and ensures even load distribution
• Manufactured in Germany for high-quality standards

Specifications

• Bore Size: 78.01mm
• Actual Bore Diameter: 77.97mm
• Displacement: 249 cm³
• Stroke: 52.20mm
• Clearance: 0.04mm
• Wossner Compression Ratio: 13.90:1
• OEM Compression Ratio: 12.90:1
• Dome Volume: +0.00 cm³
• Compression Height: 19.00mm
• Lock Part Number: CW16
• Pin Part Number: WP059
• Ring Set Part Number: 780XAS
• Rod Part Number: P4001 (2010 – Current)

Cross-Reference OEM Part Numbers

• Part No: 56-W4852.B.WO
• Wossner Part No: 8590DB

Vehicle Fitments

• Honda CRF250R (2004 – 2009)
• Honda CRF250X (2004 – 2009)