PISTON KIT 02-07 KTM EXC450 89, WOSSNER WOSSNER 8581DA 59430007000
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Wossner forged piston kit with an 89mm bore. 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, and elliptical design for uniform bearing surface and even thrust load distribution. Specifications include a bore of 89mm, standard size piston (PN# 8581DA), lock part number CW20, pin part number WP038, and ring set part number 890XSY. Displacement is 449 cm³ with a stroke of 72.00mm and a clearance of 0.04mm. Wossner Compression Ratio is OEM, OEM Compression Ratio is 11.10:1, dome volume is +7.10 cm³, and compression height is 23.50mm. Cross-reference OEM part numbers include 59430007000 and 4941M08900.
- SKU
- 56-W178.A
- Brand
- Wossner
- Availability
- In Stock (1)
Fitments (33)
| Make | Model | Year | Notes |
|---|---|---|---|
| BETA | RR 450 | 2005 | — |
| BETA | RR 450 | 2006 | — |
| BETA | RR 450 | 2007 | — |
| BETA | RR 450 | 2008 | — |
| BETA | RR 450 | 2009 | — |
| BETA | RR ENDURO 4T 450 | 2005 | — |
| BETA | RR ENDURO 4T 450 | 2006 | — |
| BETA | RR ENDURO 4T 450 | 2007 | — |
| BETA | RR ENDURO 4T 450 | 2008 | — |
| BETA | RR ENDURO 4T 450 | 2009 | — |
| KTM | 450 EXC | 2003 | 1st Filter (Long) |
| KTM | 450 EXC | 2004 | 1st Filter (Long) |
| KTM | 450 EXC | 2005 | 1st Filter (Long) |
| KTM | 450 EXC | 2006 | 1st Filter (Long) |
| KTM | 450 EXC | 2007 | 1st Filter (Long) |
| KTM | 450 EXC R | 2003 | — |
| KTM | 450 EXC R | 2004 | — |
| KTM | 450 EXC R | 2005 | — |
| KTM | 450 EXC R | 2006 | — |
| KTM | 450 EXC R | 2007 | — |
| KTM | 450 EXC Racing | 2003 | 1st Filter |
| KTM | 450 EXC Racing | 2004 | 1st Filter |
| KTM | 450 EXC Racing | 2005 | 1st Filter |
| KTM | 450 EXC Racing | 2006 | 1st Filter |
| KTM | 450 EXC Racing | 2007 | 1st Filter |
| KTM | 450 XC | 2008 | — |
| KTM | 450 XC | 2009 | — |
| KTM | 450 XC ATV | 2008 | — |
| KTM | 450 XC ATV | 2009 | — |
| POLARIS | OUTLAW MXR 450 | 2008 | — |
| POLARIS | OUTLAW MXR 450 | 2009 | — |
| POLARIS | OUTLAW MXR 450 | 2010 | — |
| POLARIS | OUTLAW MXR 450 | 2011 | — |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 89mm
- Variant Id
- 254864
FULL DESCRIPTION
Wossner 89mm Piston Kit for High Performance Engines
Upgrade your engine's performance and durability with this precision-engineered Wossner forged piston kit. Designed for optimal combustion efficiency and longevity, this kit is manufactured in Germany to the highest standards.
Key Features:
- Forged Piston Construction: Offers superior strength and a more robust design compared to cast pistons, ensuring reliable performance under demanding conditions.
- Optimized Heat Transfer: Engineered to efficiently transfer combustion chamber heat to the cylinder walls, preventing localized hot spots and contributing to overall engine health.
- Elliptical Design: Features an elliptical piston skirt for uniform bearing surface distribution, adapting to heat expansion. This reduces localized pressure and mitigates the risk of piston collapse, ensuring consistent operation.
- German Manufacturing: Crafted in Germany, guaranteeing exceptional quality, precision, and durability.
Specifications:
- Bore Diameter: 89mm
- Piston Part Number: 8581DA
- Lock Part Number: CW20
- Pin Part Number: WP038
- Ring Set Part Number: 890XSY
- Displacement: 449 cm³
- Stroke: 72.00mm
- Piston Clearance: 0.04mm
- Dome Volume: +7.10 cm³
- Compression Height: 23.50mm
- Wossner Compression Ratio: OEM
- OEM Compression Ratio: 11.10:1
Cross-Reference OEM Part Numbers:
- 59430007000
- 4941M08900
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