Wossner 78.00mm forged piston kit is designed for strength and durability. 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

• Forged construction for enhanced strength and longevity


• Optimized heat transfer for improved engine performance


• 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: 77.95mm


• Displacement: 249 cm³


• Stroke: 52.20mm


• Clearance: 0.05mm


• Wossner Compression Ratio: OEM


• OEM Compression Ratio: 12.90:1


• Dome Volume: -1.00 cm³


• Compression Height: 18.90mm


• Gasket Part Number: D4004


• Lock Part Number: CW16


• Pin Part Number: WP070


• Ring Set Part Number: 780XAS-2


• Rod Part Number: P4001

Cross-Reference OEM Part Numbers

• 13101-KRN-670


• Part No: 56-W4829.A.WO


• Wossner Part No: 8587DA

Vehicle Fitments

• Honda CRF250R (2004 - 2005)


• Honda CRF250X (2004 - 2005)