Wossner Pro Series Forged Piston kitRef : WO00551A / 1093696005

The WÖSSNER Pro Series forged piston is an engine part designed for demanding riders seeking reliability and robustness on their roadster. Machined from aluminum and forged in Germany by engine part specialists, it offers a construction suitable for both 2-stroke and 4-stroke applications without altering the original geometry.

• Manufacturer reference: 8505D200
• Type: Pro Series forged piston
• Material: aluminum
• Bore diameter: 89.00 mm
• Piston diameter: Ø 88.93 mm
• Oversize: letter 200
• Compression: standard
• Supplied with: ring(s), circlips, and pin (clip)
• Feature: anti-friction treatment on the skirt

The treatment on the skirt reduces friction against the cylinder and contributes to more uniform wear, while the forged construction provides superior mechanical strength against the thermal and mechanical stresses of riding. Suitable for roadsters and classic singles — notably Yamaha XT 500 (1989), Yamaha SR 500 (1989), and Yamaha XT 400 (1981) — while respecting the specified dimensions.

A ready-to-install replacement part, the WÖSSNER Pro Series piston is aimed at lightweight modifications as well as restorations where material quality and machining precision are crucial.