PISTON KIT 87-09 YFZ350 66.00, WOSSNER 8075D200 YAMAHA ATV

This Wossner forged piston kit with a 66.00mm bore (65.94mm actual) is intended for Yamaha two-stroke engines, including the YFZ350 Banshee, RD350 series, and RZ350. Manufactured in Germany, the piston is built for strength, consistent performance, and efficient heat dissipation. Its elliptical design ensures even surface contact during thermal expansion, minimising stress concentrations and reducing the potential for piston failure.

Features

• Forged piston construction for high strength and durability

• Designed for efficient heat transfer from combustion chamber to cylinder walls

• Elliptical profile ensures uniform load distribution under expansion

• Made in Germany

Specifications

• Bore size: 66.00mm (65.94mm)

• Display volume: 347 cm³

• Stroke: 54.00 mm

• Clearance: 0.06 mm

• Compression height: 36.00 mm

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

Cross-Reference OEM Part Numbers

• Piston: 8075D200

• Lock: CW16

• Pin: WP027

• Ring Set: RSB6600 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