Mikuni Carb Jetting Chart – Norton Commando
Download the complete PDF version using the green download button at the top right of this page for baseline Mikuni carburetor jetting specifications and tuning information for Norton Commando motorcycles.
This technical reference chart provides recommended Mikuni carburetor jetting settings for Norton Commando 750 and 850 models using several common single and dual carburetor configurations.
The chart includes main jet sizes, needle jet specifications, needle types, idle jet sizes, slide numbers and idle air jet settings commonly used for stock muffler setups at sea level.
This resource serves as a useful starting point for tuning Mikuni VM carburetors during restoration, performance tuning or troubleshooting work on Norton Commando motorcycles.
Contents Include
- 750 single 34mm Mikuni jetting
- 750 dual 34mm Mikuni jetting
- 850 single 34mm Mikuni jetting
- 850 single 36mm Mikuni jetting
- 850 single 38mm Mikuni jetting
- Main jet specifications
- Needle jet settings
- Needle type recommendations
- Idle jet settings
- Slide cutaway specifications
- Idle air jet settings
- Baseline tuning recommendations
Covered Norton Models
- Norton Commando 750
- Norton Commando 850
- Norton Roadster
- Norton Interstate
- Norton Fastback
- Norton Hi-Rider
- Norton MK3
