Old Britts – Converting a MK3 to Pea Shooter Mufflers
Download the complete PDF version using the green download button at the top right of this page for a useful Old Britts reference explaining the bracket differences between pre-MK3 Norton Commando Roadster muffler mounts and MK3 exhaust mounting hardware. This article is especially helpful for owners converting an MK3 Black Cap exhaust system to Pea Shooter mufflers and wanting to understand exactly which bracket components must be changed.
This technical guide explains that the conversion requires fitting the earlier pre-MK3 muffler mounting brackets because the MK3 muffler mounting lugs sit farther back toward the rear of the motorcycle. Although the muffler mounting hole spacing is the same, the bracket positions differ, and the article clearly shows how the pre-MK3 and MK3 arrangements compare when viewed together.
The included reference photograph labels the relevant bracket part numbers and helps identify the correct components for each mounting system. It also notes that the remaining associated hardware, such as foot pegs, nuts, bolts and spacers, remains the same between the two exhaust bracket setups.
Contents Include
- MK3 to Pea Shooter muffler conversion overview
- Pre-MK3 Roadster muffler bracket identification
- MK3 Black Cap muffler bracket comparison
- Explanation of mounting lug position differences
- Forward mounting hole alignment reference
- Bracket part number identification
- Pre-MK3 bracket numbers 06-1720, 06-1721 and 06-1722
- MK3 bracket numbers 06-4148, 06-4149 and 06-4150
- Useful exhaust conversion reference for Commando owners
- Old Britts bracket comparison photograph
