PISTON KIT 81-19 PW50 42.00, 8267D200 WOSSNER YAMAHA

This Wossner forged piston kit is a +2.00mm oversize replacement specifically designed for Yamaha PW50 models from 1981 to 1995. Ideal for engines requiring a substantial overbore, this kit delivers reliable performance and superior strength in two-stroke applications.

Features

• Forged piston construction ensures maximum strength and longevity

• Elliptical design provides a consistent bearing surface during thermal expansion

• Optimised for efficient heat transfer from the combustion chamber to cylinder walls

• Reduces risk of piston collapse by evenly distributing thrust loads

• Manufactured in Germany

Specifications

• Bore Size: 42.00mm

• Actual Piston Size: 41.95mm

• 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: RSB4200

Cross-Reference OEM Part Numbers

• Part No: 8267D200

Vehicle Fitments

• Yamaha PW50 (1981–1995)