Old Britts – Pre-MK3 and MK3 Muffler Bracket Conversions
Download the complete PDF version using the green download button at the top right of this page for detailed Norton Commando muffler bracket comparison and conversion information. This technical article by Fred Eaton explains the differences between pre-MK3 Roadster muffler mounting brackets and MK3 muffler bracket systems used on Norton Commando motorcycles.
The guide shows how to convert a Norton MK3 Black Cap exhaust system to traditional Pea Shooter mufflers by installing the earlier pre-MK3 muffler mounting brackets and related hardware.
Detailed photographs and part number references are included showing the different mounting systems, rubber mounts, bracket locations and exhaust mounting geometry used between the two setups.
This resource is especially useful for Norton restorers and owners performing exhaust conversions or sourcing the correct mounting hardware for restoration projects.
Contents Include
- Pre-MK3 muffler bracket identification
- MK3 muffler bracket identification
- Pea Shooter exhaust conversion guidance
- Black Cap exhaust conversion information
- Bracket mounting point comparisons
- Rubber mount positioning details
- Exhaust mounting geometry explanation
- Original Norton part number references
- Bracket hardware comparison photographs
- Workshop installation guidance
Supported Norton Models
- Norton Commando 750
- Norton Commando 850
- Norton Roadster
- Norton Interstate
- Norton Fastback
- Norton Hi-Rider
- Norton MK3 Electric Start
