Triumph Spitfire HS2 - 1 1/4 Carburettors (Pairs) - Mk1, Mk2, Mk3 and MkIV
SU Carburettors Overhaul & Identification
It is quite straightforward (with the help of a workshop manual) to service and overhaul your carburettors using the service items listed in this section. Both fuel economy and performance can suffer through lack of carb maintenance and with the tightening of the MOT regulations regarding 'Exhaust Emissions', it is important that they are maintained in good working order. Incorrectly adjusted or worn carbs can also cause premature engine wear because fuel that remains in the cylinders causes 'bore-wash', which eventually glazes the bores, resulting in excessive oil consumption. We can recondition your own SU carburettors, or we can supply reconditioned units - on a strict exchange basis. The listings here however are primarily for identification purposes only. They will also show if you have the correct type of carb fitted (part numbers/engine numbers are quoted to help identify original factory specification, and relate to carb's fitted when the vehicle was new and not subsequent replacements). To check, the carbs can be positively identified by a part number marked on a silver tag which is located on the float chamber. Examples:
HS2 - AUD257F (Front) or AUD257R (Rear)
HS4 - AUD665F (Front) or AUD665R (Rear)
Reconditioned exchange carbs are supllied in pairs. Throttle & choke connecting linkage not included.
In Some cases actual change points of carburettors (chassis no's etc) were not recorded by the factory. Moreover, it is not uncommon to find that carburettors have been changed by previous owners.To positively identify which carburettors are fitted to your vehicle, check the part number which is stamped on a metal tag located on the float chamber.
Having identified your carburettors refer to the listings for replacement reconditioned carburettors or individual components
Note: Because we only supply carburettors in pairs (front & rear) all our carburettor part numbers have the suffix 'PR'.