Name: Piston Kit 02-07 KTM EXC450 89, Wossner Wossner 8581DC
Brand: Wossner
SKU: 56-W178.C

Piston Kit 02-07 KTM EXC450 89, Wossner Wossner 8581DC

Wossner
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Description

Wossner forged piston kit with an 89.02mm bore, designed for KTM EXC 450 Racing, Beta RR450, and Polaris Outlaw 450 MXR models. Engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany for durability and precision.

Features

Forged piston for superior strength and design
Optimized heat transfer to cylinder walls
Elliptical design for uniform bearing surface and even thrust load distribution
Manufactured in Germany

Specifications

Bore: 89.02mm (+0.02mm oversize)
Standard size piston (PN# 8581DC)
Lock Part Number: CW20
Pin Part Number: WP038
Ring Set Part Number: 890XSY
Displacement: 449 cm³
Stroke: 72.00mm
Clearance: 0.04mm
Wossner Compression Ratio: OEM
OEM Compression Ratio: 11.10:1
Dome Volume: +7.10 cm³
Compression Height: 23.50mm

Cross-Reference OEM Part Numbers

Not provided

Vehicle Fitments

KTM EXC 450 Racing (2003-2007)
Beta RR450 (2005-2009)
Polaris Outlaw 450 MXR (2008-2011)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
KTM	EXC 450	2003-2007
POLARIS	OUTLAW MXR 450	2008-2010
KTM	XC ATV 450	2008-2009
KTM	XC 450	2008-2009
KTM	EXC R 450	2003-2007
BETA	RR 450	2005-2009
POLARIS	OUTLAW MXR 450	2008-2011

Piston Kit 02-07 KTM EXC450 89, Wossner Wossner 8581DC

Wossner
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Wossner forged piston kit with an 89.02mm bore, designed for KTM EXC 450 Racing, Beta RR450, and Polaris Outlaw 450... Read more

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SKU: 56-W178.C

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Description

Wossner forged piston kit with an 89.02mm bore, designed for KTM EXC 450 Racing, Beta RR450, and Polaris Outlaw 450 MXR models. Engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany for durability and precision.

Features

Forged piston for superior strength and design
Optimized heat transfer to cylinder walls
Elliptical design for uniform bearing surface and even thrust load distribution
Manufactured in Germany

Specifications

Bore: 89.02mm (+0.02mm oversize)
Standard size piston (PN# 8581DC)
Lock Part Number: CW20
Pin Part Number: WP038
Ring Set Part Number: 890XSY
Displacement: 449 cm³
Stroke: 72.00mm
Clearance: 0.04mm
Wossner Compression Ratio: OEM
OEM Compression Ratio: 11.10:1
Dome Volume: +7.10 cm³
Compression Height: 23.50mm

Cross-Reference OEM Part Numbers

Not provided

Vehicle Fitments

KTM EXC 450 Racing (2003-2007)
Beta RR450 (2005-2009)
Polaris Outlaw 450 MXR (2008-2011)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
KTM	EXC 450	2003-2007
POLARIS	OUTLAW MXR 450	2008-2010
KTM	XC ATV 450	2008-2009
KTM	XC 450	2008-2009
KTM	EXC R 450	2003-2007
BETA	RR 450	2005-2009
POLARIS	OUTLAW MXR 450	2008-2011

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.