WOSSNER 78mm FORGED HC PISTON KIT A, HONDA CRF250R 04-09, CRF250X 04-09

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: 13.90:1
• 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

• 13101-KRN-670
• Part No: 56-W4852.A.WO
• Wossner Part No: 8590DA

Vehicle Fitments

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

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.