Name: Piston Kit 98-99 YZF400 92.00, Forged Wossner 8603DB
Brand: Wossner
SKU: 56-W4649.B.WO

Piston Kit 98-99 YZF400 92.00, Forged Wossner 8603DB

Wossner
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Description

The Wossner 92.01mm Bore Piston Kit (Part No. 8603DB) is a high-performance forged piston designed for Yamaha YZ400F and WR400F models. Built for superior strength and durability, it enhances heat transfer within the combustion chamber and features an elliptical design for even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance.

Features

High-strength forged piston construction
Optimized heat transfer for improved combustion efficiency
Elliptical design for even thrust load distribution
Manufactured in Germany

Specifications

Bore Size: 92.01mm
Actual Bore Diameter: 91.96mm
Compression Ratio: OEM
OEM Compression Ratio: 11.0:1
Displacement: 290cc
Stroke: 61.20mm
Clearance: 0.06mm
Dome Volume: -4.80cm³
Compression Height: 23.00mm

Cross-Reference OEM Part Numbers

Lock P/N: CW18
Pin P/N: WP053
Ring Set P/N: 920XSY

Vehicle Fitments

Yamaha YZ400F (1998-1999)
Yamaha WR400F (1998-1999)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YZ F 400	1998-1999
YAMAHA	WR F 400	1998-2000
YAMAHA	YZF 400	1998-1999
YAMAHA	WRF 400	1998-2000
YAMAHA	YZF 400	1998-2000
YAMAHA	YZF 450	1998-1999

Piston Kit 98-99 YZF400 92.00, Forged Wossner 8603DB

Wossner
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The Wossner 92.01mm Bore Piston Kit (Part No. 8603DB) is a high-performance forged piston designed for Yamaha YZ400F and WR400F... Read more

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SKU: 56-W4649.B.WO

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Description

The Wossner 92.01mm Bore Piston Kit (Part No. 8603DB) is a high-performance forged piston designed for Yamaha YZ400F and WR400F models. Built for superior strength and durability, it enhances heat transfer within the combustion chamber and features an elliptical design for even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance.

Features

High-strength forged piston construction
Optimized heat transfer for improved combustion efficiency
Elliptical design for even thrust load distribution
Manufactured in Germany

Specifications

Bore Size: 92.01mm
Actual Bore Diameter: 91.96mm
Compression Ratio: OEM
OEM Compression Ratio: 11.0:1
Displacement: 290cc
Stroke: 61.20mm
Clearance: 0.06mm
Dome Volume: -4.80cm³
Compression Height: 23.00mm

Cross-Reference OEM Part Numbers

Lock P/N: CW18
Pin P/N: WP053
Ring Set P/N: 920XSY

Vehicle Fitments

Yamaha YZ400F (1998-1999)
Yamaha WR400F (1998-1999)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YZ F 400	1998-1999
YAMAHA	WR F 400	1998-2000
YAMAHA	YZF 400	1998-1999
YAMAHA	WRF 400	1998-2000
YAMAHA	YZF 400	1998-2000
YAMAHA	YZF 450	1998-1999

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.