PISTON KIT 02-20 YZ85 47.50 B, WOSSNER 8104DB YAMAHA MX
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Delivery to United States 5–8 business days
Wossner forged piston kit with a 47.51mm bore (+0.01mm oversize) is designed for Yamaha YZ85 models. Crafted for high-performance two-stroke engines, the piston offers excellent strength, heat management, and reliability. Manufactured in Germany, it features an elliptical design that enhances structural integrity under thermal expansion and mechanical load. Features include forged construction for superior strength and longevity, optimised design for efficient combustion heat transfer to cylinder walls, and an elliptical profile that ensures even bearing surface and minimises risk of piston collapse. Made in Germany. Specifications: Bore: 47.51mm, Actual Bore: 47.46mm, Engine Displacement: 85 cm³, Stroke: 47.80mm, Clearance: 0.05mm, Compression Ratio: 2-stroke (Wossner and OEM), Compression Height: 26.00mm, Lock Part Number: CW14, Pin Part Number: WP058, Ring Set Part Number: RSB4750, Con Rod Kit Part Number: P2008.
- SKU
- 56-W805.B.WO
- Brand
- Wossner
- Availability
- Out of Stock
Fitments (52)
| Make | Model | Year |
|---|---|---|
| YAMAHA | YZ 80 | 1993 |
| YAMAHA | YZ 80 | 1994 |
| YAMAHA | YZ 80 | 1995 |
| YAMAHA | YZ 80 | 1996 |
| YAMAHA | YZ 80 | 1997 |
| YAMAHA | YZ 80 | 1998 |
| YAMAHA | YZ 80 | 1999 |
| YAMAHA | YZ 80 | 2000 |
| YAMAHA | YZ 80 | 2001 |
| YAMAHA | YZ 85 | 2002 |
| YAMAHA | YZ 85 | 2003 |
| YAMAHA | YZ 85 | 2004 |
| YAMAHA | YZ 85 | 2005 |
| YAMAHA | YZ 85 | 2006 |
| YAMAHA | YZ 85 | 2007 |
| YAMAHA | YZ 85 | 2008 |
| YAMAHA | YZ 85 | 2009 |
| YAMAHA | YZ 85 | 2010 |
| YAMAHA | YZ 85 | 2011 |
| YAMAHA | YZ 85 | 2012 |
| YAMAHA | YZ 85 | 2013 |
| YAMAHA | YZ 85 | 2014 |
| YAMAHA | YZ 85 | 2015 |
| YAMAHA | YZ 85 | 2016 |
| YAMAHA | YZ 85 | 2017 |
| YAMAHA | YZ 85 | 2018 |
| YAMAHA | YZ 85 | 2019 |
| YAMAHA | YZ 85 | 2020 |
| YAMAHA | YZ 85 | 2021 |
| YAMAHA | YZ 85 | 2022 |
| YAMAHA | YZ 85 | 2023 |
| YAMAHA | YZ 85 | 2024 |
| YAMAHA | YZ 85 | 2025 |
| YAMAHA | YZ BB 85 | 2002 |
| YAMAHA | YZ BB 85 | 2003 |
| YAMAHA | YZ BB 85 | 2004 |
| YAMAHA | YZ BB 85 | 2005 |
| YAMAHA | YZ BB 85 | 2006 |
| YAMAHA | YZ BB 85 | 2007 |
| YAMAHA | YZ BB 85 | 2008 |
| YAMAHA | YZ BB 85 | 2009 |
| YAMAHA | YZ BB 85 | 2010 |
| YAMAHA | YZ BB 85 | 2011 |
| YAMAHA | YZ BB 85 | 2012 |
| YAMAHA | YZ BB 85 | 2013 |
| YAMAHA | YZ BB 85 | 2014 |
| YAMAHA | YZ BB 85 | 2015 |
| YAMAHA | YZ BB 85 | 2016 |
| YAMAHA | YZ BB 85 | 2017 |
| YAMAHA | YZ BB 85 | 2018 |
| YAMAHA | YZ BB 85 | 2019 |
| YAMAHA | YZ BB 85 | 2020 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 47.50mm
- Variant Id
- 257835
FULL DESCRIPTION
Wossner 47.51mm Forged Piston Kit for High-Performance Two-Stroke Engines
Enhance the performance and durability of your Yamaha YZ85 with this premium Wossner forged piston kit. Engineered for demanding off-road applications, this piston is designed to deliver superior strength, exceptional heat management, and unwavering reliability. Manufactured with precision in Germany, Wossner pistons are renowned for their advanced design and high-quality materials.
This specific kit features a 47.51mm bore, representing a slight oversize for potential engine rebuilds or performance tuning. The piston's advanced elliptical design is a key feature, providing enhanced structural integrity by adapting to thermal expansion and mechanical stresses. This intelligent design ensures even bearing surfaces and significantly minimizes the risk of piston collapse under extreme operating conditions, contributing to a longer engine life.
Key Features:
- Forged Construction: Offers superior strength and longevity compared to cast pistons, making it ideal for high-performance engines.
- Optimised Heat Transfer: Designed to efficiently transfer combustion heat to the cylinder walls, aiding in consistent engine temperatures.
- Elliptical Piston Profile: Ensures even bearing surface distribution and reduces the likelihood of piston collapse during operation.
- German Engineering: Manufactured in Germany, a testament to precision engineering and quality craftsmanship.
Specifications:
- Bore Size: 47.51mm
- Actual Bore: 47.46mm
- Engine Displacement: 85 cm³
- Stroke: 47.80mm
- Clearance: 0.05mm
- Compression Ratio: Designed for 2-stroke applications (compatible with Wossner and OEM specifications)
- Compression Height: 26.00mm
- Lock Part Number: CW14
- Pin Part Number: WP058
- Ring Set Part Number: RSB4750
- Con Rod Kit Part Number: P2008
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
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.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. 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
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