PISTON KIT SET/4 CBR1000RR, WOSSNER K8742DA-4 75.00mm

This Wossner forged piston kit K8742DA-4 features a standard 75.00mm bore and is specifically engineered for HONDA CBR1000RR models from 2004 to 2007. Precision-crafted in Germany, this four-piston set offers increased compression for enhanced performance, while maintaining structural integrity under high thermal and mechanical loads.

Features

• Forged piston design ensures superior durability and performance

• Optimised for efficient heat transfer to cylinder walls

• Elliptical shape provides uniform bearing surface under thermal expansion

• Prevents localised pressure and piston collapse

• Manufactured in Germany

Specifications

• Bore: 75.00mm (STD)

• Piston code: Wossner K8742DA-4

• Clip part number: CW17

• Piston pin: WP083

• Ring set: 750XKS

• Displacement: 998 cm³

• Stroke: 56.50 mm

• Clearance: 0.05 mm

• Wossner compression ratio: 13.50:1

• OEM compression ratio: 12.20:1

• Dome volume: +0.00 cm³

• Compression height: 23.50 mm

Cross-Reference OEM Part Numbers

• Part No. 56-W9884.00A.WO

Vehicle Fitments

• HONDA CBR1000RR 2004–2007