Wossner forged piston kit designed for durability and optimized heat transfer. Engineered with an elliptical shape for uniform bearing surface distribution, preventing piston collapse. Manufactured in Germany for high performance and reliability.

Features

• Forged construction for superior strength and longevity
• Optimized heat transfer for efficient combustion
• Elliptical design for even thrust load distribution
• Manufactured in Germany

Specifications

• Piston Size: 87.42mm
• Bore: 87.50mm
• Oversize: +0.50mm
• Clearance: 0.08mm
• Display: 465 cm³
• Stroke: 82.00mm
• Compression Ratio: 2-stroke
• Compression Height: 40.00mm
• Lock Part Number: CW18
• Pin Part Number: WP042
• Ring Set Part Number: RSC8750 x2

Cross-Reference OEM Part Numbers

• Wossner 8266D050

Vehicle Fitments

• Yamaha YZ490 (1982-1983)
• Yamaha IT490 (1983-1984)