PISTON KIT SET/4 YZF1000 07-08, WOSSNER K8753DA-4 YAMAHA

This piston kit is engineered for Yamaha R1 YZF1000 models from 2007 to 2008. It includes a set of four forged Wossner pistons with a standard bore size of 77.00mm, designed for high-performance and durability. Featuring an elliptical profile, these pistons evenly distribute thrust loads during heat expansion, enhancing engine reliability. Manufactured in Germany, the kit maintains standard displacement and is optimised for thermal efficiency and strength.

Features

• Set of 4 forged Wossner pistons

• Standard bore size (77.00mm, actual piston diameter 76.96mm)

• Elliptical design for consistent pressure distribution under heat expansion

• Engineered for improved heat transfer to cylinder walls

• Made in Germany

Specifications

• Part Number: K8753DA-4

• Bore Size: 77.00mm (actual piston size 76.96mm)

• Displacement: 1000cc

• Display Displacement: 998cm³

• Stroke: 58.00mm

• Clearance: 0.05mm

• Wossner Compression Ratio: 10.20:1

• OEM Compression Ratio: 11.80:1

• Dome Volume: -2.60cm³

• Compression Height: 22.80mm

Cross-Reference OEM Part Numbers

• Clip: CW17

• Piston Pin: WP111

• Replacement Ring Set: RIK77.00D3

Vehicle Fitments

• Yamaha R1 YZF1000 2007–2008