Name: Piston Kit 08-09 WR250X 77 Hc, Forged Wossner 8772DB
Brand: Wossner
SKU: 56-W239.B.WO

Piston Kit 08-09 WR250X 77 Hc, Forged Wossner 8772DB

Wossner
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Description

Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter, designed for Yamaha WR250X models. This Pro Series piston is engineered for high performance, featuring superior strength and design. Manufactured in Germany, it ensures optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.

Features

Forged construction for superior strength
Optimized heat transfer for efficient combustion
Elliptical design for uniform load distribution
High compression ratio for increased performance
Manufactured in Germany

Specifications

Bore: 77.01mm
Diameter: 76.97mm
Display (cm³): 249
Stroke (mm): 53.60
Clearance (mm): 0.04
Wossner Compression Ratio: 13.50:1
OEM Compression Ratio: 11.80:1
Dome Volume (cm³): -4.50
Compression Height (mm): 22.20

Cross-Reference OEM Part Numbers

Wossner Piston Yamaha WR250X (PN# 8772DB)
Lock P/N: CW17
Pin P/N: WP083
Ring Set P/N: 770XAS-2

Vehicle Fitments

Yamaha WR250X (2008-2009)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	WR X 250	2008-2012

Piston Kit 08-09 WR250X 77 Hc, Forged Wossner 8772DB

Wossner
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Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter, designed for Yamaha WR250X models. This Pro Series piston... Read more

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SKU: 56-W239.B.WO

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Description

Wossner forged piston kit with a 77.01mm bore and 76.97mm diameter, designed for Yamaha WR250X models. This Pro Series piston is engineered for high performance, featuring superior strength and design. Manufactured in Germany, it ensures optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.

Features

Forged construction for superior strength
Optimized heat transfer for efficient combustion
Elliptical design for uniform load distribution
High compression ratio for increased performance
Manufactured in Germany

Specifications

Bore: 77.01mm
Diameter: 76.97mm
Display (cm³): 249
Stroke (mm): 53.60
Clearance (mm): 0.04
Wossner Compression Ratio: 13.50:1
OEM Compression Ratio: 11.80:1
Dome Volume (cm³): -4.50
Compression Height (mm): 22.20

Cross-Reference OEM Part Numbers

Wossner Piston Yamaha WR250X (PN# 8772DB)
Lock P/N: CW17
Pin P/N: WP083
Ring Set P/N: 770XAS-2

Vehicle Fitments

Yamaha WR250X (2008-2009)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	WR X 250	2008-2012

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.