
The Story
This standard bore piston kit by Wossner is engineered for Harley Davidson 1200 and 1100 EVO Sportster models. With a 3.501" bore and domed piston design, it delivers a compression ratio of 9.5:1, offering durable performance through precision forging and advanced thermal handling characteristics.
Features
-
Forged high-performance pistons (2 pcs), skirt-coated for reduced friction
-
Designed for optimal heat transfer from combustion chamber to cylinder walls
-
Elliptical piston geometry ensures uniform pressure distribution under heat expansion
-
Domed piston design with 9.5:1 compression ratio
-
Manufactured in Germany
-
Includes rings, clips, and pins
Specifications
-
Bore size: 3.501"
-
Compression ratio: 9.5:1
-
Piston type: Forged, skirt-coated, domed
-
Quantity: 2 pistons per kit
-
Wossner Part Number: K8618DA-2
-
Alternate Part No: 56-W9954.000.WO
Cross-Reference OEM Part Numbers
-
Not specified beyond kit and ring inclusions
Vehicle Fitments
-
Harley Davidson 1200 EVO Sportster (73 cu. in), years 1988–2003
-
Harley Davidson 1100 EVO Sportster, years 1986–1987

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
This standard bore piston kit by Wossner is engineered for Harley Davidson 1200 and 1100 EVO Sportster models. With a 3.501" bore and domed piston design, it delivers a compression ratio of 9.5:1, offering durable performance through precision forging and advanced thermal handling characteristics.
Features
-
Forged high-performance pistons (2 pcs), skirt-coated for reduced friction
-
Designed for optimal heat transfer from combustion chamber to cylinder walls
-
Elliptical piston geometry ensures uniform pressure distribution under heat expansion
-
Domed piston design with 9.5:1 compression ratio
-
Manufactured in Germany
-
Includes rings, clips, and pins
Specifications
-
Bore size: 3.501"
-
Compression ratio: 9.5:1
-
Piston type: Forged, skirt-coated, domed
-
Quantity: 2 pistons per kit
-
Wossner Part Number: K8618DA-2
-
Alternate Part No: 56-W9954.000.WO
Cross-Reference OEM Part Numbers
-
Not specified beyond kit and ring inclusions
Vehicle Fitments
-
Harley Davidson 1200 EVO Sportster (73 cu. in), years 1988–2003
-
Harley Davidson 1100 EVO Sportster, years 1986–1987




















