PISTON KIT 88-92 YZ80 48.50, WOSSNER 8187D050 YAMAHA MX

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)