Iron Sportster bill of material
Blog BOM Custom Design
Garage OSARM Repair Smörg

Clutch gear extension

This extension mounts seals that keep oil out of the dry clutch.


The clutch extension holds an O-ring and a seal that keeps oil out of the dry clutch.

It is used from 1956 serial number 56KH-1465. It is not used on the electric-start dry-clutch gear 1967-1970, or the wet clutch gear 1971-on.

You press the extension into the early dry clutch gear. The one on the left has its O-ring and seal. The middle extension is a mystery since it is not grooved for an O-ring, it may be for early 1955 K-models.

A close-up of the clutch gear extension without the seal or O-ring installed.
Bottom of first column This is the end.