Name: Piston Kit 87-09 YFZ350 66.50, Wossner 8075D250 Yamaha ATV
Brand: Wossner
SKU: 56-W513+250.WO

Piston Kit 87-09 YFZ350 66.50, Wossner 8075D250 Yamaha ATV

Wossner
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Description

This Wossner forged piston kit features a 66.50mm bore size and is designed for high-performance applications in a range of Yamaha two-stroke engines. Engineered in Germany, the piston ensures optimised heat transfer, structural integrity, and uniform bearing surface through its elliptical design. It is suited for applications where durability and precision are required. This kit includes a +2.50 oversize piston and is compatible with multiple Yamaha models spanning decades of production.

Features

Forged construction for improved strength and durability
Elliptical design distributes thrust loads evenly to prevent piston collapse
Enhanced heat transfer from combustion chamber to cylinder walls
Made in Germany
Includes piston, pin, locks, and ring set

Specifications

Bore Size: 66.50mm
Actual Bore: 66.44mm
Stroke: 54.00mm
Clearance: 0.06mm
Compression Ratio (Wossner and OEM): 2-stroke
Compression Height: 36.00mm
Displacement: 347 cm³

Cross-Reference OEM Part Numbers

Piston Kit Part No: 56-W513+250.WO
Lock P/N: CW16
Pin P/N: WP027
Ring Set P/N: RSB6650 (x2)

Vehicle Fitments

Yamaha YFZ 350 Banshee (1987–2007)
Yamaha RD350 LC - YPVS (1980–1987)
Yamaha RD350 AC (1950–2014)
Yamaha RZ350 (1982–1990)
Yamaha RD 350 (1973–1976)
Yamaha RD 400 (1976)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	RD 350	1973-1990
YAMAHA	RD 400	1976-1982

Piston Kit 87-09 YFZ350 66.50, Wossner 8075D250 Yamaha ATV

Wossner
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This Wossner forged piston kit features a 66.50mm bore size and is designed for high-performance applications in a range of... Read more

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SKU: 56-W513+250.WO

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Description

This Wossner forged piston kit features a 66.50mm bore size and is designed for high-performance applications in a range of Yamaha two-stroke engines. Engineered in Germany, the piston ensures optimised heat transfer, structural integrity, and uniform bearing surface through its elliptical design. It is suited for applications where durability and precision are required. This kit includes a +2.50 oversize piston and is compatible with multiple Yamaha models spanning decades of production.

Features

Forged construction for improved strength and durability
Elliptical design distributes thrust loads evenly to prevent piston collapse
Enhanced heat transfer from combustion chamber to cylinder walls
Made in Germany
Includes piston, pin, locks, and ring set

Specifications

Bore Size: 66.50mm
Actual Bore: 66.44mm
Stroke: 54.00mm
Clearance: 0.06mm
Compression Ratio (Wossner and OEM): 2-stroke
Compression Height: 36.00mm
Displacement: 347 cm³

Cross-Reference OEM Part Numbers

Piston Kit Part No: 56-W513+250.WO
Lock P/N: CW16
Pin P/N: WP027
Ring Set P/N: RSB6650 (x2)

Vehicle Fitments

Yamaha YFZ 350 Banshee (1987–2007)
Yamaha RD350 LC - YPVS (1980–1987)
Yamaha RD350 AC (1950–2014)
Yamaha RZ350 (1982–1990)
Yamaha RD 350 (1973–1976)
Yamaha RD 400 (1976)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	RD 350	1973-1990
YAMAHA	RD 400	1976-1982

Shipping & Delivery

How long will my item take to arrive?

Orders are typically dispatched within 1 working day and are shipped on a 24hour (non-guaranteed) service.

Where do you ship to?

We currently only ship orders within the UK.

How can I track my order?

Once your order has been dispatched, you will receive a tracking code. Tracking information is emailed to the email address that was provided when placing the order.

Can I collect my order?

Unfortunately we do not offer order collections from our fulfilment centre.