Wossner forged - 4085 Piston kitRef : WO00370A / 1122777002

WÖSSNER Forged Piston - Reference 4085DB
Forged piston designed and manufactured in Germany by Wössner, intended for 2/4 stroke Cross engines. Made of aluminum with a friction-reducing treatment on the skirt, this piston features an oversize B and a precise diameter of Ø 96.97 mm. It is delivered complete with its rings, clips, and pin for easier installation during an engine rebuild.

• Type: Forged piston
• Compression: High compression
• Diameter: Ø 96.970 mm (letter B)
• Material: Aluminum
• Number of rings: 3
• Supplied: rings, clips, and pin included

Suitable for demanding Cross machines, this piston is aimed at riders and mechanics looking for a quality engine part to rebuild a cylinder. Its forged construction and skirt finish minimize friction and ease the break-in process, while the B size ensures a proper fit on an oversized cylinder. Particularly suitable for models such as YAMAHA YZ 450 F (2026), FANTIC XXF 450 (2024), and YAMAHA WR 450 F (2024).