Wossner 77.01mm 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: 77.01mm


• Actual Bore Diameter: 76.97mm


• Displacement: 249 cm³


• Stroke: 53.60mm


• Clearance: 0.04mm


• Wossner Compression Ratio: 12.10:1


• OEM Compression Ratio: 12.60:1


• Dome Volume: -5.90 cm³


• Compression Height: 19.60mm


• Gasket Part Number: D4013


• Lock Part Number: CW16


• Pin Part Number: WP059


• Ring Set Part Number: 770XAS


• Rod Part Number: P4002

Cross-Reference OEM Part Numbers

• Part No: 56-W4842.B.WO


• Wossner Part No: 8582DB

Vehicle Fitments

• Kawasaki KX250F (2004 - 2005)


• Suzuki RM-Z250 (2004 - 2006)