PISTON KIT 87-08 YFZ350 65.25, WOSSNER 8075D125 YAMAHA ATV

This Wossner forged piston kit with a 65.25mm bore (65.19mm actual) is built for Yamaha two-stroke engines such as the YFZ350 Banshee, RD350 models, RZ350, and others. Manufactured in Germany, it features a forged construction and elliptical design that enhances structural integrity, improves heat transfer, and promotes uniform load distribution to reduce piston collapse under thermal stress.

Features

• Forged piston construction for high strength and durability

• Engineered for effective heat transfer from combustion chamber to cylinder walls

• Elliptical profile ensures even pressure distribution under expansion

• Made in Germany

Specifications

• Bore size: 65.25mm (65.19mm)

• Display volume: 347 cm³

• Stroke: 54.00 mm

• Clearance: 0.06 mm

• Compression height: 36.00 mm

• Dome volume: Not specified

• Theoretical weight: Not specified

• Compression ratio: 2-stroke (Wossner and OEM)

Cross-Reference OEM Part Numbers

• Piston: 8075D125

• Lock: CW16

• Pin: WP027

• Ring Set: RSB6525 x 2

Vehicle Fitments

• Yamaha YFZ350 Banshee 1987–2007

• Yamaha RD350 LC – YPVS 1980–1987

• Yamaha RD350 AC 1950–2014

• Yamaha RZ350 1982–1990

• Yamaha YFM350 1987–2008

• Yamaha RD350 1973–1975