PISTON KIT 00-07 KTM520 525 95, WOSSNER 8547DB BETA RR525
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
Wossner forged piston kit offering superior strength and optimized heat transfer for high-performance applications. Features an elliptical design for uniform bearing surface under heat expansion, reducing localized pressure and preventing piston collapse. Manufactured in Germany for precision and durability. Specifications include a bore size of 95.01mm, actual bore of 94.96mm, display volume of 510 cm³, stroke of 54.80mm, clearance of 0.04mm, Wossner compression ratio of 12.90:1, OEM compression ratio of 12.80:1, dome volume of 1.20 cm³, compression height of 19.50mm, lock part number CW20, pin part number WP038, and ring set part number 950ADS-2. Part number 56-W4731.B.WO.
- SKU
- 56-W4731.B.WO
- Brand
- Wossner
- Availability
- In Stock (1)
Fitments (71)
| Make | Model | Year | Notes |
|---|---|---|---|
| BETA | RR 525 | 2005 | — |
| BETA | RR 525 | 2006 | — |
| BETA | RR 525 | 2007 | — |
| BETA | RR 525 | 2008 | — |
| BETA | RR 525 | 2009 | — |
| BETA | RR ENDURO 4T 525 | 2005 | — |
| BETA | RR ENDURO 4T 525 | 2006 | — |
| BETA | RR ENDURO 4T 525 | 2007 | — |
| BETA | RR ENDURO 4T 525 | 2008 | — |
| BETA | RR ENDURO 4T 525 | 2009 | — |
| KTM | 520 EXC | 2000 | 1st Filter (Long) |
| KTM | 520 EXC | 2001 | 1st Filter (Long) |
| KTM | 520 EXC | 2002 | 1st Filter (Long) |
| KTM | 520 SX | 2000 | 1st Filter |
| KTM | 520 SX | 2001 | 1st Filter |
| KTM | 520 SX | 2002 | 1st Filter |
| KTM | 525 EXC | 2003 | 1st Filter |
| KTM | 525 EXC | 2004 | 1st Filter |
| KTM | 525 EXC | 2005 | 1st Filter |
| KTM | 525 EXC | 2006 | 1st Filter |
| KTM | 525 EXC | 2007 | 1st Filter |
| KTM | 525 EXC | 2008 | — |
| KTM | 525 EXC | 2009 | — |
| KTM | 525 EXC | 2010 | — |
| KTM | 525 EXC RACING | 2003 | — |
| KTM | 525 EXC RACING | 2004 | — |
| KTM | 525 EXC RACING | 2005 | — |
| KTM | 525 EXC RACING | 2006 | — |
| KTM | 525 EXC RACING | 2007 | — |
| KTM | 525 SM R | 2004 | — |
| KTM | 525 SM R | 2005 | — |
| KTM | 525 SM-R | 2004 | — |
| KTM | 525 SM-R | 2005 | — |
| KTM | 525 SX | 2003 | 1st Filter |
| KTM | 525 SX | 2004 | 1st Filter |
| KTM | 525 SX | 2005 | 1st Filter |
| KTM | 525 SX | 2006 | 1st Filter |
| KTM | 525 SX | 2007 | 1st Filter |
| KTM | 525 SX | 2008 | — |
| KTM | 525 SX | 2009 | — |
| KTM | 525 SX | 2010 | — |
| KTM | 525 XC | 2008 | — |
| KTM | 525 XC | 2009 | — |
| KTM | 525 XC | 2010 | — |
| KTM | 525 XC | 2011 | — |
| KTM | 525 XC | 2012 | — |
| KTM | 525 XC ATV | 2003 | — |
| KTM | 525 XC ATV | 2004 | — |
| KTM | 525 XC ATV | 2005 | — |
| KTM | 525 XC ATV | 2006 | — |
| KTM | 525 XC ATV | 2007 | — |
| KTM | 525 XC ATV | 2008 | — |
| KTM | 525 XC ATV | 2009 | — |
| KTM | 525 XC ATV | 2010 | — |
| KTM | 525 XC ATV | 2011 | — |
| KTM | 525 XC ATV | 2012 | — |
| POLARIS | OUTLAW 450 | 2003 | — |
| POLARIS | OUTLAW 450 | 2004 | — |
| POLARIS | OUTLAW 450 | 2005 | — |
| POLARIS | OUTLAW 450 | 2006 | — |
| POLARIS | OUTLAW 450 | 2007 | — |
| POLARIS | OUTLAW 450 | 2008 | — |
| POLARIS | OUTLAW 450 | 2009 | — |
| POLARIS | OUTLAW 450 | 2010 | — |
| POLARIS | OUTLAW 450 | 2011 | — |
| POLARIS | OUTLAW 525 | 2007 | — |
| POLARIS | OUTLAW 525 | 2008 | — |
| POLARIS | OUTLAW 525 | 2009 | — |
| POLARIS | OUTLAW 525 | 2010 | — |
| POLARIS | OUTLAW 525 | 2011 | — |
| POLARIS | OUTLAW 525 | 2012 | — |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 95mm
- Variant Id
- 255970
FULL DESCRIPTION
Wossner Forged Piston Kit for High-Performance Engines
Upgrade your engine with a Wossner forged piston kit, engineered for superior strength and optimized heat transfer. This kit features an elliptical piston design that ensures a uniform bearing surface, even under extreme heat expansion. This design minimizes localized pressure and effectively prevents piston collapse, leading to improved engine longevity and performance. Manufactured to exacting standards in Germany, Wossner pistons are synonymous with precision and durability.
Key Features:
- Forged Construction: Provides exceptional strength and durability for demanding applications.
- Optimized Heat Transfer: Promotes efficient heat dissipation to cylinder walls, enhancing overall engine performance.
- Elliptical Piston Design: Guarantees even thrust load distribution for reduced wear and increased reliability.
- German Manufacturing: Ensures precision engineering and premium quality materials.
Specifications:
- Bore Size: 95.01mm
- Actual Bore: 94.96mm
- Display (cm³): 510
- Stroke (mm): 54.80
- Clearance (mm): 0.04
- Wossner Compression Ratio: 12.90:1
- OEM Compression Ratio: 12.80:1
- Dome Volume (cm³): 1.20
- Compression Height (mm): 19.50
- Lock Part Number: CW20
- Pin Part Number: WP038
- Ring Set Part Number: 950ADS-2
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.