PISTON KIT 86-88 YZ125 56.75, WOSSNER 8118D075 YAMAHA MX
PISTON KIT 86-88 YZ125 56.75, WOSSNER 8118D075 YAMAHA MX
This Wossner 56.75mm (+0.75 oversize) forged piston kit is designed for Yamaha YZ125 models from 1986 to 1988. Featuring a forged build and elliptical design, the piston is engineered for thermal expansion control, even thrust load distribution, and reliable performance in two-stroke engines. Manufactured in Germany, it ensures efficient heat transfer from the combustion chamber to the cylinder walls under demanding conditions.
Features
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Forged piston construction for enhanced strength and durability
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Elliptical design provides consistent bearing surface under thermal expansion
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Even distribution of thrust loads minimises localised stress and prevents piston collapse
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Optimised for efficient heat transfer from combustion chamber to cylinder walls
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Manufactured in Germany
Specifications
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Bore: 56.75mm
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Actual diameter: 56.69mm
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Displacement: 123 cm³
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Stroke: 50.00mm
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Clearance: 0.06mm
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Compression height: 30.00mm
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Compression ratio: 2-stroke
Cross-Reference OEM Part Numbers
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Piston Kit Part No.: 56-W559+075.WO
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Wossner Piston Kit No.: 8118D075
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Lock: CW16
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Pin: WP036
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Ring Set: RSB5675
Vehicle Fitments
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Yamaha YZ125 1986
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Yamaha YZ125 1987
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Yamaha YZ125 1988