PISTON KIT HARLEY 3.534 SET/2, WOSSNER K8542D090-2 DAVIDSON, ROAD

This Wossner piston kit is designed for Harley Davidson 1340 EVO Big Twin engines (80 cu. in.) with a 4.250″ stroke, produced from 1984 to 1999. Featuring a 3.534″ bore oversized by +0.032″, the kit includes domed pistons delivering a 9.5:1 compression ratio for improved performance and thermal efficiency.

Features

• Forged high-performance pistons (2 pcs), skirt-coated for reduced friction and extended service life

• Engineered for optimal combustion chamber heat transfer to cylinder walls

• Elliptical design ensures even load distribution and prevents piston collapse during thermal expansion

• Domed piston configuration supports a 9.5:1 compression ratio

• Manufactured in Germany

• Includes rings, clips, and pins

Specifications

• Bore size: 3.534″ (+0.032″ oversize)

• Compression ratio: 9.5:1

• Stroke: 4.250″

• Piston type: Forged, skirt-coated, domed

• Quantity: 2 pistons per kit

• Wossner Part Number: K8542D090-2

• Alternate Part No: 56-W9957.090.WO

Vehicle Fitments

• Harley Davidson 1340 EVO Big Twin (80 cu. in.), stroke 4.250, years 1984–1999