PISTON KIT-4 KZ1000J,R D72.00, WOSSNER K8796D250-4 KAWASAKI

This Wossner piston kit set includes four forged pistons with a 72.00mm bore and 71.94mm diameter, offering a +2.5mm oversize fitment. Designed for Kawasaki KZ1000J and KZ1000R models from 1981 to 1983, this high-performance kit increases engine displacement to 1075–1105 cm³ and provides improved compression and thermal efficiency for four-cylinder engines.

Features

• Forged construction for exceptional strength and durability

• Engineered for efficient heat transfer from combustion chamber to cylinder walls

• Elliptical design ensures uniform bearing surface during thermal expansion

• Distributes thrust loads evenly to reduce risk of piston collapse

• Manufactured in Germany

• Supplied as a set of 4 pistons, pins, rings, and clips

Specifications

• Bore: 72.00mm

• Diameter: 71.94mm

• Engine Displacement: 1075 / 1105 cm³

• Stroke: 66.00 mm

• Clearance: 0.06 mm

• Compression Ratio (Wossner): 1075 cc = 10.30:1 / 1105 cc = 10.50:1

• Compression Ratio (OEM): 9.20:1

• Dome Volume: 18.80 cm³

• Compression Height: 25.30 mm

• Theoretical Weight: 25.30 g

• Engine Cylinders: 4

• Clips P/N: CW17

• Pin P/N: WP083

• Ring Set P/N: 720XDS

Cross-Reference OEM Part Numbers

• Part No. 56-W9934.250.WO

• Wossner Piston K8796D250-4

Vehicle Fitments

• Kawasaki KZ1000J 1981–1983

• Kawasaki KZ1000R 1981–1983