PISTON KIT 87-09 YFZ350 65.00, WOSSNER 8075D100 YAMAHA ATV

This Wossner forged piston kit with a 64.100mm bore (64.94mm actual) is designed for Yamaha two-stroke models including the YFZ350 Banshee, RD350 series, RZ350, and others. Engineered in Germany, it offers enhanced structural integrity and thermal management. The elliptical design allows for uniform bearing surface distribution during thermal expansion, reducing localised stress and minimising the risk of piston collapse.

Features

• Forged piston construction for high strength and durability

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

• Elliptical profile promotes even pressure distribution under expansion

• Made in Germany

Specifications

• Bore size: 64.100mm (64.94mm)

• 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: 8075D100

• Lock: CW16

• Pin: WP027

• Ring Set: RSB6500 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 RD350 1973–1977

• Yamaha RD400 1976

• Yamaha RD450 1976

• Yamaha RD350 1977