Wossner 66.50mm 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: 66.50mm


• Actual Bore Diameter: 66.46mm


• Displacement: 230 cm³


• Stroke: 66.20mm


• Clearance: 0.04mm


• Wossner Compression Ratio: 11.00:1


• OEM Compression Ratio: 9.00:1


• Dome Volume: +3.10 cm³


• Compression Height: 21.20mm


• Gasket Part Number: D4002


• Lock Part Number: CW15


• Pin Part Number: WP011


• Ring Set Part Number: 665XKS


• Rod Part Number: P4053 (2003 - on)

Cross-Reference OEM Part Numbers

• Part No: 56-W4816+100.WO


• Wossner Part No: 8774D100

Vehicle Fitments

• Honda CRF230F (2003 - 2009, 2012 - 2015)