PISTON KIT 02-20 YZ85 47.50 C, WOSSNER 8104DC YAMAHA MX
This Wossner forged piston kit features a 47.52mm bore with a 0.02mm oversize. It is designed for Yamaha YZ85 models and has a bore of 47.47mm. The engine displacement is 85 cm³ and the stroke is 47.80mm, with a clearance of 0.05mm. The compression ratio is 2-stroke (Wossner and OEM), and the compression height is 26.00mm. This kit includes lock part number CW14, pin part number WP058, ring set part number RSB4750, and con rod kit part number P2008. It is manufactured in Germany for durability and performance in two-stroke applications, featuring a precision elliptical profile for optimal heat transfer, load balance, and resistance to deformation under thermal expansion. The forged construction ensures maximum strength and reliability.
- SKU
- 56-W805.C.WO
- Brand
- Wossner
- Availability
- In Stock (2)
FULL DESCRIPTION
Wossner Forged Piston Kit for Yamaha YZ85
This high-performance Wossner forged piston kit is engineered to enhance the power and longevity of your Yamaha YZ85. Precision manufactured in Germany, this kit is designed for durability and optimal performance in demanding two-stroke applications.
Key Features:
- Forged construction for superior strength and reliability under stress.
- Optimized design for efficient combustion heat transfer directly to the cylinder walls, aiding in consistent engine temperature.
- Features a precision elliptical profile to ensure uniform bearing surface and significantly reduce the risk of piston collapse.
- Manufactured in Germany, guaranteeing exceptional quality and engineering standards.
Specifications:
- Bore Size: 47.52mm (Oversize +0.02mm)
- Actual Piston Diameter: 47.47mm
- Engine Displacement: 85 cm³
- Stroke: 47.80mm
- Piston to Cylinder Clearance: 0.05mm
- Compression Ratio: Designed for 2-stroke engines (Wossner and OEM compatibility)
- Compression Height: 26.00mm
- Lock Part Number: CW14
- Pin Part Number: WP058
- Ring Set Part Number: RSB4750
- Con Rod Kit Part Number: P2008


