PISTON KIT 06-09 CRF250R X 78, FORGED WOSSNER 8656DA, 13101-KRN-850

Wossner 78.00mm 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: 78.00mm
• Actual Bore Diameter: 77.96mm
• Displacement: 249 cm³
• Stroke: 52.20mm
• Clearance: 0.04mm
• Wossner Compression Ratio: 13.50:1
• OEM Compression Ratio: 12.90:1
• Dome Volume: -0.90 cm³
• Compression Height: 24.00mm
• Theoretical Weight: 19.00g
• Gasket Part Number: D4004
• Lock Part Number: CW16
• Pin Part Number: WP059
• Ring Set Part Number: 780XAS

Cross-Reference OEM Part Numbers

• 13101-KRN-850
• Part No: 56-W4830+00A.WO
• Wossner Part No: 8656DA

Vehicle Fitments

• Honda CRF250R (2006 – 2009)
• Honda CRF250X (2006 – 2009)