Name: Piston Kit YFM400FW 00-06, Forged Wossner 8901DA 5GH-11631-00-00
Brand: Wossner
SKU: 56-W9924.00A.WO

Piston Kit YFM400FW 00-06, Forged Wossner 8901DA 5GH-11631-00-00

Wossner
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Description

This Wossner piston kit features a standard 92.00mm bore with a measured diameter of 84.42mm, engineered for Yamaha YFM400FW Kodiak (2000–2006) and YFM4 Grizzly 400 (2007–2008) models. Built for durability and thermal efficiency, this forged piston is optimised for four-stroke engine performance in utility ATV applications.

Features

Forged piston construction for superior strength and reliability
Advanced heat transfer design from combustion chamber to cylinder walls
Elliptical profile promotes uniform bearing surface under thermal expansion
Even thrust load distribution reduces localised stress and prevents piston collapse
Manufactured in Germany

Specifications

Bore: 92.00mm
Diameter: 84.42mm
Display: 400 cm³
Stroke: 70.50 mm
Clearance: 0.08 mm
Compression Ratio (Wossner): 8.50:1
Compression Ratio (OEM): 10.50:1
Dome Volume: -2.90 cm³
Compression Height: 26.90 mm
Clips P/N: CW20
Pin P/N: WP052
Ring Set P/N: 845XSY

Cross-Reference OEM Part Numbers

Part No. 56-W9924.00A.WO
Wossner Piston 8901DA
5GH-11631-00-00
40076M08450

Vehicle Fitments

Yamaha YFM400FW Kodiak 2000–2006
Yamaha YFM4 Grizzly 400 2007–2008

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YFM KODIAK 400	2000-2008
YAMAHA	YFM GRIZZLY 400	2008

Piston Kit YFM400FW 00-06, Forged Wossner 8901DA 5GH-11631-00-00

Wossner
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This Wossner piston kit features a standard 92.00mm bore with a measured diameter of 84.42mm, engineered for Yamaha YFM400FW Kodiak... Read more

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SKU: 56-W9924.00A.WO

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Description

This Wossner piston kit features a standard 92.00mm bore with a measured diameter of 84.42mm, engineered for Yamaha YFM400FW Kodiak (2000–2006) and YFM4 Grizzly 400 (2007–2008) models. Built for durability and thermal efficiency, this forged piston is optimised for four-stroke engine performance in utility ATV applications.

Features

Forged piston construction for superior strength and reliability
Advanced heat transfer design from combustion chamber to cylinder walls
Elliptical profile promotes uniform bearing surface under thermal expansion
Even thrust load distribution reduces localised stress and prevents piston collapse
Manufactured in Germany

Specifications

Bore: 92.00mm
Diameter: 84.42mm
Display: 400 cm³
Stroke: 70.50 mm
Clearance: 0.08 mm
Compression Ratio (Wossner): 8.50:1
Compression Ratio (OEM): 10.50:1
Dome Volume: -2.90 cm³
Compression Height: 26.90 mm
Clips P/N: CW20
Pin P/N: WP052
Ring Set P/N: 845XSY

Cross-Reference OEM Part Numbers

Part No. 56-W9924.00A.WO
Wossner Piston 8901DA
5GH-11631-00-00
40076M08450

Vehicle Fitments

Yamaha YFM400FW Kodiak 2000–2006
Yamaha YFM4 Grizzly 400 2007–2008

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YFM KODIAK 400	2000-2008
YAMAHA	YFM GRIZZLY 400	2008

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.