This Wossner forged piston kit is a standard-size replacement specifically designed for Yamaha PW80 and BW80 two-stroke models. With a 47mm bore, it ensures excellent durability, fitment, and thermal efficiency for long-lasting engine performance.

Features

• Forged piston for enhanced strength and wear resistance

• Elliptical design ensures a uniform bearing surface under thermal expansion

• Maximises heat transfer from combustion chamber to cylinder walls

• Evenly distributes thrust loads to reduce the risk of piston collapse

• Manufactured in Germany

Specifications

• Bore Size: 47.00mm

• Actual Piston Size: 46.95mm

• Stroke: 45.60mm

• Piston Clearance: 0.05mm

• Wossner Compression Ratio: 2-stroke

• OEM Compression Ratio: 2-stroke

• Compression Height: 29.50mm

• Lock Part Number: CW12

• Pin Part Number: WP091

• Ring Set Part Number: RSB4700

Cross-Reference OEM Part Numbers

• Part No: 8233DA

Vehicle Fitments

• Yamaha PW80 (1983–1993)

• Yamaha BW80 (1986–1988, 1990)

• Yamaha YB/TY/PW80 -3E5-