Wössner 99mm forged piston kit designed for Honda XR600R models from 1985 to 2001. Engineered for optimal combustion chamber heat transfer and uniform load distribution, reducing localized pressure and preventing piston collapse. Made in Germany for durability and performance.

Features

• Forged construction for superior strength and durability


• Optimized heat transfer to cylinder walls


• Elliptical design ensures uniform bearing surface under heat expansion


• Reduces localized pressure and evenly distributes thrust loads


• Prevents piston collapse under high-stress conditions

Specifications

• Bore Size: 99.00mm (Actual Size: 98.94mm)


• Wössner Part Number: 8574D200


• Lock Part Number: CW24


• Pin Part Number: WP023


• Ring Set Part Number: 990XSY


• Rod Part Number: P4028


• Displacement: 654 cm³


• Stroke: 80.00mm


• Clearance: 0.06mm


• Compression Ratio: 9.30:1


• OEM Compression Ratio: 9.00:1


• Dome Volume: -4.80 cm³


• Compression Height: 29.70mm


• Theoretical Weight: 348.00g

Cross-Reference OEM Part Numbers

• Not specified

Vehicle Fitments

• Honda XR600R (1985-2001)


• Honda XR600 (1985-2001)