WOSSNER 48.5mm PISTON KIT YAMAHA YZ80 1988-1992

The Wossner 8187D050 piston kit is designed for Yamaha YZ80 models from 1988 to 1992, featuring a 48.50 mm bore for +0.50 mm oversize applications. Manufactured in Germany with forged construction, this piston provides excellent structural integrity and heat transfer capabilities. Its elliptical design promotes an even bearing surface during thermal expansion, preventing localised stress and reducing the likelihood of piston collapse. This kit includes all essential components for a reliable engine rebuild.

Features

• Forged piston delivers high durability and heat resistance

• Optimised for efficient heat transfer from the combustion chamber

• Elliptical profile ensures uniform load distribution under expansion

• Prevents localised stress to reduce piston failure risk

• Made in Germany to high engineering standards

Specifications

• Bore Size: 48.50 mm

• Actual Bore Diameter: 48.45 mm

• Stroke: 45.60 mm

• Display Displacement: 82 cm³

• Clearance: 0.05 mm

• Compression Ratio (Wossner and OEM): 2-stroke

• Compression Height: 27.00 mm

Cross-Reference Wossner Part Numbers

• Piston Kit: 8187D050

• Lock: CW12

• Pin: WP091

• Ring Set: RSB4850

• Part No.: 56-W569+050.WO

Vehicle Fitments

• Yamaha YZ80 (1988–1992)

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.