Yamaha YZ 400 Competition [1976-1979] - WÖSSNER forged pistons

WÖSSNER forged pistons for Yamaha YZ 400 Competition

The WÖSSNER forged piston is intended for the Yamaha YZ 400 Competition from the entire 1976-1979 model year range. The version is designed for standard piston compression and is therefore suitable for the targeted selection of a suitable piston based on the specified technical data.

Design and technical data

• Piston type: forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 85.92 mm
• Letter oversize: 100
• Oversize: +1.00
• Bore diameter: 86.00 mm
• Number of piston rings: 2
• Version: 2T

The forged aluminum design and the stated oversize of +1.00, together with the bore diameter of 86.00 mm, form the key selection criteria for this piston. The diameter Ø of 85.92 mm supplements the technical data for checking before ordering.

Vehicle assignment

The piston is assigned to the Yamaha YZ 400 Competition, built between 1976 and 1979. Before making your selection, please compare the piston diameter, bore diameter, oversize and piston compression with the existing engine.

Important parameters at a glance

• WOSSNER forged pistons for the Yamaha YZ 400 Competition
• Year of manufacture: 1976-1979
• Standard piston compression
• Oversize +1.00 with letter Oversize 100
• 2 piston rings