The DCO/SP 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. They are fitted with 62mm air horns. The factory calibrations for the 48 DCO/SP are: 42mm chokes, 5.0 aux venturi, F7 emulsion tubes, 180 main jet, 160 air correctors, 65F8 idle jets, 45 pump jet ,100 pump spill, 250 needle valve
