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The Wossner piston kit 8114DA is a standard-size forged piston with a 55.94mm bore, designed for Yamaha YZ125 two-stroke models from 1990 to 1993. This piston offers robust performance and reliability, utilising a forged construction and elliptical geometry to enhance heat management and reduce localised stress during operation. Manufactured in Germany, it meets the demands of high-performance off-road applications.
Features
Forged piston construction for enhanced strength and longevity
Optimised for superior heat transfer from combustion chamber to cylinder wall
Elliptical shape provides even bearing surface under thermal expansion
Precision engineered and manufactured in Germany
Specifications
Display (cm³): 124
Bore size: 55.94mm (standard for 56mm cylinder)
Stroke (mm): 50.70
Piston-to-wall clearance (mm): 0.06
Compression height (mm): 28.00
Compression ratio: 2-stroke (Wossner and OEM)
Cross-Reference OEM Part Numbers
Wossner Piston: 8114DA
Lock: CW16
Pin: WP036
Ring Set: RSB5600 x 2
Internal Reference Part No.: 56-W629+00A.WO
OEM Cross-Reference: 4DB-11631-00-A0
Vehicle Fitments
1990 Yamaha YZ125
1991 Yamaha YZ125
1992 Yamaha YZ125
1993 Yamaha YZ125