PISTON KIT XR XLR 500 90.00, FORGED WOSSNER 8642D100

Wossner forged piston kit with a 90mm bore (89.94mm) for Honda XR400, XLS400, XLR500, XLS500, and XR500R models. Designed for superior strength and heat transfer efficiency, this piston ensures optimal combustion performance. The elliptical design distributes thrust loads evenly, reducing localized pressure and preventing piston collapse. Manufactured in Germany.

Features

• Forged piston for increased strength and durability
• Optimized heat transfer for improved performance
• Elliptical design ensures uniform bearing surface under heat expansion
• Even thrust load distribution to prevent piston collapse
• Manufactured in Germany

Specifications

• Bore Size: 90mm (89.94mm)
• Compression Ratio: 9.0:1
• Part Number: 8642D100
• Lock Part Number: CW21
• Pin Part Number: WP034
• Ring Set Part Number: 900XSY
• Displacement: 398 cm³
• Stroke: 64.00mm
• Clearance: 0.06mm
• OEM Compression Ratio: 8.6:1
• Dome Volume: +0.00 cm³
• Compression Height: 29.70mm

Vehicle Fitments

• Honda XR400 (1981-1982)
• Honda XLS400 (1981-1982)
• Honda XLR500 (1979-1984)
• Honda XLS500 (1979-1984)
• Honda XR500R (1979-1982)