Old Britts – Electric Start Conversion for Pre-1975 Commandos
Download the complete PDF version using the green download button at the top right of this page for detailed Old Britts installation instructions covering their electric start conversion for pre-1975 Norton Commandos. This extensive workshop guide explains the complete conversion process across six major phases, from removing the engine cradle and swingarm through to fitting the starter motor, wiring harness, belt drive primary components, final assembly and completion checks.
The article documents the conversion in considerable detail with clear workshop photographs throughout. It covers preparing parts for modification, fitting the revised engine cradle, upgrading or repositioning rear Isolastics, reinstalling the swingarm, routing starter wiring, installing the starter bracket, connecting the battery harness and testing the starter before the primary drive is completed.
The guide also includes important installation notes for the inner and outer primary cases, clutch basket and ring gear clearance, belt drive pulley and tensioner setup, alternator positioning, oil pipe clearance, oil tank mounting concerns and center stand modification where required. This makes it an invaluable reference for anyone carrying out or studying an Old Britts pre-MK3 Commando electric start conversion.
Contents Include
- Pre-1975 Commando electric start conversion overview
- Engine cradle and swingarm removal phases
- Preparing primary cases and parts for modification
- MK3 rear Isolastic installation and orientation notes
- Starter motor, bracket and wiring harness installation
- Battery box, starter button and switch cluster wiring
- Starter function testing before primary drive assembly
- Clutch basket, ring gear and belt alignment guidance
- Belt tensioner, alternator and primary case installation
- Oil pipe clearance, oil tank mounting and center stand changes
- Final reassembly notes and completion checks
