Due to Covid 19 we are currently working with few staff than normal as we adhere to social distancing guidelines. With high volumes of orders we are taking up to 6 days to despatch orders and answer emails. We endeavour to do both as quick as possible and thank you for your patience.


The technical articles for SU are divided into categories.

Please click a category heading on the left to show or hide the articles in the category. Please click on an article name to go to the actual article or click on the relevant image below to go to the first page in each category.

The SU Carb company
Jet Needles
Introduction to SU Carburetters
H Types Carburetters
HD Type Carburetters
HS Type Carburetters
HIF Type Carburetters
Thermo Carburetters
Electric Fuel Pumps
Mechanical Fuel Pumps
Choke units and Thermos
Fuel Pumps
Technical Maintainance and settings
Needle Comparison Charts