PISTON KIT 85-87 YZ80 49.00 WOSSNER 8186D100 YAMAHA MX

This Wossner piston kit is designed for Yamaha YZ80 models from 1985 to 1987, featuring a 49.00 mm bore and an actual piston diameter of 48.95 mm. Forged in Germany, the piston offers high strength and efficient heat dissipation from the combustion chamber to the cylinder walls. Its elliptical design promotes uniform bearing surface under thermal expansion, minimising localised pressure and helping to prevent piston collapse.

Features

• Forged construction for improved durability

• Engineered for effective heat transfer from combustion chamber

• Elliptical shape ensures even thrust load distribution

• Manufactured in Germany

Specifications

• Bore size: 49.00 mm

• Actual piston diameter: 48.95 mm

• Display (cm³): 82

• Stroke: 45.60 mm

• Clearance: 0.05 mm

• Compression height: 26.80 mm

• Wossner compression ratio: 2-stroke

• OEM compression ratio: 2-stroke

Cross-Reference OEM Part Numbers

• Wossner Piston Part Number: 8186D100

• Lock Part Number: CW12

• Pin Part Number: WP091

• Ring Set Part Number: RSB4900

• Alternate Part Number: 56-W520+100.WO

Vehicle Fitments

• Yamaha YZ80 1985

• Yamaha YZ80 1986

• Yamaha YZ80 1987

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.