PISTON KIT 87-09 YFZ350 65.50, WOSSNER 8075D150 YAMAHA ATV

This Wossner forged piston kit with a 65.50mm bore (65.44mm actual) is designed for Yamaha two-stroke models such as the YFZ350 Banshee, RD350 variants, and the RZ350. Made in Germany, the piston features a forged design for enhanced strength and thermal performance. Its elliptical shape helps ensure even load distribution during expansion, reducing localised stress and minimising the risk of piston collapse.

Features

• Forged piston construction for high strength and durability

• Engineered for optimal combustion heat transfer to cylinder walls

• Elliptical profile promotes uniform pressure distribution under thermal expansion

• Made in Germany

Specifications

• Bore size: 65.50mm (65.44mm)

• 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: 8075D150

• Lock: CW16

• Pin: WP027

• Ring Set: RSB6550 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