The Wossner 67mm Bore Piston Kit (Part No. 8155D100) is a high-performance forged piston designed for Honda CR250R models from 1981 to 1983. Engineered for durability and efficient heat transfer, it features an elliptical design to ensure even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston is specifically designed for two-stroke engines.

Features

• High-strength forged piston construction


• Optimized heat transfer for improved combustion efficiency


• Elliptical design for even thrust load distribution


• Designed for two-stroke applications


• Manufactured in Germany

Specifications

• Bore Size: 67mm


• Actual Bore Diameter: 66.94mm


• Compression Ratio: Two-stroke


• OEM Compression Ratio: Two-stroke


• Displacement: 246cc


• Stroke: 72.00mm


• Clearance: 0.06mm


• Compression Height: 241.20mm (likely incorrect; please verify)

Cross-Reference OEM Part Numbers

• Lock P/N: CW18


• Pin P/N: WP033


• Ring Set P/N: RSB6700 x2

Vehicle Fitments

• Honda CR250R (1981-1983)