PISTON KIT-4 KZ1000J,R D73.00, WOSSNER K8796D350-4 KAWASAKI

This Wossner piston kit set includes four forged pistons with a 73.00mm bore and 72.94mm diameter, offering a +3.5mm oversize fitment for Kawasaki KZ1000J and KZ1000R models from 1981 to 1983. Engineered for increased displacement and improved compression, this kit enhances engine performance while maintaining structural reliability under demanding conditions.

Features

• Forged piston construction ensures superior strength and durability

• Optimised for efficient combustion chamber heat transfer to cylinder walls

• Elliptical profile promotes uniform bearing surface under heat expansion

• Reduces localised pressure and distributes thrust loads evenly to prevent piston collapse

• Manufactured in Germany

• Complete kit includes 4 pistons, pins, rings, and circlips

Specifications

• Bore: 73.00mm

• Diameter: 72.94mm

• 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: 730XDS

Cross-Reference OEM Part Numbers

• Part No. 56-W9934.350.WO

• Wossner Piston K8796D350-4

Vehicle Fitments

• Kawasaki KZ1000J 1981–1983

• Kawasaki KZ1000R 1981–1983