Yamaha XT 400 [1980-1981] - WÖSSNER Pro Series forged pistons

WÖSSNER Pro Series forged pistons for the Yamaha XT 400

The WÖSSNER Pro Series forged piston is designed for the Yamaha XT 400 from the entire 1980-1981 model year range. The design combines a forged piston type with aluminum and standard piston compression.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 87.43 mm
• Letter oversize: 050
• Oversize: +0.05
• Bore diameter: 87.50 mm
• Compression ratio: 9.9:1
• Rings Quantity: 3
• Stroke: 4T

Selection and assignment

The diameter Ø of 87.43 mm, the bore diameter of 87.50 mm as well as the marking “050” and oversize +0.05 are particularly relevant for the selection. The compression ratio is 9.9:1. The information supports the comparison with the technical requirements of the Yamaha XT 400 in the 1980–1981 model year range.

Factual product data

The piston is assigned to the “Piston” category in the “Top engine” range. The number of rings is 3. The information “Stroke: 4T” is shown as a technical feature for this forged piston.