PISTON KIT 81-19 PW50 40.50, WOSSNER 8267D050 YAMAHA

This Wossner forged piston kit is a +0.50mm oversize replacement for Yamaha PW50 models from 1981 to 1997. Engineered with precision and manufactured in Germany, it provides enhanced strength and consistent performance for two-stroke engine applications requiring a slightly larger bore size.

Features

• Forged piston construction for superior strength and durability

• Elliptical design ensures a consistent bearing surface during heat expansion

• Promotes efficient heat dissipation to cylinder walls

• Prevents localised stress and piston collapse

• Manufactured in Germany

Specifications

• Bore Size: 40.50mm

• Actual Piston Size: 40.45mm

• Stroke: 39.20mm

• Piston Clearance: 0.05mm

• Wossner Compression Ratio: 2-stroke

• OEM Compression Ratio: 2-stroke

• Compression Height: 24.90mm

• Lock Part Number: CW10

• Pin Part Number: WP105

• Ring Set Part Number: RSB4050

Cross-Reference OEM Part Numbers

• Part No: 8267D050

Vehicle Fitments

• Yamaha PW50 (1981–1997)