The DCO series carburettor is designed for all out performance with excellent tunability. There is no cold start mechanism (as fitted to DCOE carburettors) therefore minimising moving parts and the chance of any fuel accidently leaking into the carburettor.
The 55 DCO SPW has a full spindle passing through the body so a linkage can be attached to either side of the carburettor. The image shown does not show the full spindle.
Factory Calibrations are;
48mm chokes, 5.0 aux venturi, F7 emulsion tube, 180 main jet, 160 air corrector, 65F8 idle jet, 45 pump jet, 100 pump spill, 250 needle valve
The air horns are 45mm in length