PISTON KIT 83-87 YZ250 70.00, WOSSNER 8133D200 YAMAHA MX
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Wossner forged piston kit for Yamaha YZ250 models from 1983 to 1987, featuring a 70.00 mm bore for performance applications requiring a +2.00 mm oversize. The piston is designed to optimise combustion efficiency and mechanical reliability. With an elliptical profile and advanced forging, it ensures uniform stress distribution, effective heat transfer, and reduced risk of piston deformation under high thermal loads. Precision-engineered and made in Germany. Features forged piston construction for enhanced strength and reliability. Engineered for efficient heat transfer from combustion chamber to cylinder wall. Elliptical design for balanced load distribution and minimised thermal stress. Suitable for 2-stroke engine applications. Manufactured in Germany. Specifications include a 70.00 mm bore, 69.94 mm actual bore diameter, 36.00 mm compression height, 246 cm³ display volume, 68.00 mm stroke, 0.06 mm clearance, and a 2-stroke compression ratio. Cross-reference OEM part numbers include piston kit part no. 8133D200, lock p/n CW18, pin p/n WP033, ring set p/n RSB7000 (x2), rod p/n P2048, and alternate part no. 56-W560+200.WO.
- SKU
- 56-W560+200.WO
- Brand
- Wossner
- Availability
- Out of Stock
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 70mm
- Variant Id
- 256840
FULL DESCRIPTION
Wossner 70.00mm Forged Piston Kit for Yamaha YZ250
Upgrade your Yamaha YZ250 with this high-performance Wossner forged piston kit. Engineered for 1983-1987 models, this 70.00 mm bore piston offers a +2.00 mm oversize solution for enhanced power and efficiency. Its advanced forged construction and elliptical profile ensure superior strength, optimal heat transfer, and uniform stress distribution, reducing the risk of deformation under high thermal loads. Precision-made in Germany for reliability and performance.
Key Features
- Forged piston construction for increased strength and durability.
- Designed for efficient heat transfer from the combustion chamber to the cylinder wall.
- Elliptical piston profile for balanced load distribution and minimised thermal stress.
- Suitable for demanding 2-stroke engine applications.
- Manufactured to exacting standards in Germany.
Specifications
- Bore Size: 70.00 mm
- Actual Bore Diameter: 69.94 mm
- Compression Height: 36.00 mm
- Display Volume: 246 cm³
- Stroke: 68.00 mm
- Clearance: 0.06 mm
- Compression Ratio: Compatible with 2-stroke (Wossner and OEM)
Included Components
- Piston Kit Part Number: 8133D200
- Lock Ring Part Number: CW18
- Pin Part Number: WP033
- Ring Set Part Number: RSB7000 (quantity of 2)
- Rod Part Number: P2048 (for 1983-1989 models)
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