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This Wossner forged piston kit with a 56mm bore (55.94mm) is designed for the 1984 Yamaha YZ125. Manufactured in Germany, it delivers high durability and thermal efficiency. The piston features an elliptical design that ensures a uniform bearing surface during expansion, reducing stress and helping prevent piston collapse under load.
Features
Forged piston construction for enhanced strength
Engineered for efficient heat transfer to the cylinder walls
Elliptical profile supports even expansion and load distribution
Made in Germany
Specifications
Bore size: 56mm (55.94mm)
Display volume: 123 cm³
Stroke: 50.00 mm
Clearance: 0.06 mm
Compression height: 30.80 mm
Theoretical weight: Not specified
Compression ratio: 2-stroke (Wossner and OEM)
Cross-Reference OEM Part Numbers
Piston: 8120DA
Lock: CW16
Pin: WP036
Ring Set: RSB5600
Vehicle Fitments
Yamaha YZ125 1984