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T300 Mikuni Carburettor
Maintenance |
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Cleaning |
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To complete the first task of cleaning you will need a small bowl of
clean petrol and a toothbrush. Addressing one carburettor at a time, thoroughly wash all its loose
components to remove any dirt, grime, and dried petrol deposits, before
laying them out on a cloth or towel to dry. After washing and drying all three sets of components, use a
combination of carburettor tools, and an air compressor if you have one, to
ensure that all the small orifices, channels, and mating surfaces of these
components are clean and free from all blockages. Carefully check the pilot jet, needle jet, and main jet. These have
holes that are very small and easily blocked. Be careful not to damage any of the components by forcing cleaning
tools into small apertures, or scratching any of their polished surfaces. Next you must turn your attention to the carburettor housings
themselves. Again using a small bowl of petrol and a toothbrush, remove any
dirt, grime, and petrol deposits from all external and internal surfaces as
best you can. After shaking the housings dry, use both carburettor tools and an air
compressor to thoroughly clean all the small orifices, channels, and mating
surfaces. Pay particular attention to the two areas that are most often the
cause of idling and throttle response problems: the pilot air screw orifice,
and the pilot jet circuit itself Using a light source, ensure you have no blockage in the very small
hole at the end of the pilot air screw orifice, it is easily blocked. Finally, check that the extended brass capillary tube at the base of
the carburettor housing which feeds the pilot jet circuit is also free from
any blockages |
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