Old Britts – Throttle Setup for Twin Mikuni Carburetors
Download the complete PDF version using the green download button at the top right of this page for an Old Britts technical article covering the installation and throttle cable setup for twin Mikuni carburetors on Norton Commandos. This illustrated guide explains how to convert from twin Amal carburetors to Mikuni carburetors using splayed manifolds, throttle splitters and custom cable routing.
The article begins by explaining why Mikuni carburetors require special offset manifolds due to their larger body size compared with standard Amal carburetors. It then covers installation of the aluminum manifolds, rubber mounting adaptors and carburetor positioning before moving into the throttle cable setup procedures.
Detailed sections explain fitting the Mikuni slides, routing the cables through the curved adjusters, setting up the throttle splitter and using temporary wooden spacers to hold the slides fully open during adjustment. The guide also covers throttle housing assembly, cable adjustment and fitting modified K&N filters to clear the Commando frame rails.
Contents Include
- Converting Norton Commandos from Amal to Mikuni carburetors
- Twin Mikuni manifold installation procedures
- Rubber carburetor mounting adaptor setup
- Throttle cable routing and curved adjuster positioning
- Mikuni slide installation and adjustment
- Throttle splitter assembly procedures
- Using wooden spacers during cable setup
- Throttle housing and twist grip assembly
- Final throttle cable adjustment procedures
- K&N filter fitting and clearance modifications
- Fuel line routing and final assembly photographs
