The Wossner 49.50mm Bore Piston Kit (Part No. 8184D050) is a high-performance forged piston designed for the 1981 Yamaha YZ80. 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: 49.50mm


• Actual Bore Diameter: 49.45mm


• Compression Ratio: Two-stroke


• OEM Compression Ratio: Two-stroke


• Displacement: 79cc


• Stroke: 42.00mm


• Clearance: 0.05mm


• Compression Height: 24.20mm

Cross-Reference OEM Part Numbers

• Lock P/N: CW12


• Pin P/N: WP091


• Ring Set P/N: RSB4950

Vehicle Fitments

• Yamaha YZ80 (1981)