aprilia sr50 problem?

my scooter starts but the revs sound like allover the place then cuts out like it is starved of fuel replaced the carb ecu unit spark plugfuel crankshaft and seals and bearings spent alot of time and money and its still the same also bought a main jet kit and messed about
any help would be great thanks
ytree356nvs, August 2012


done
i replaced the fuel tap im getting fuel to the spark plug no problem. iv also replaced the stator

ytree356nvs, August 2012
hi have you tryed putting a new fuel filter on it if it has 1 and make sure the fuel is running free aswell from the tank

steve 44, August 2012
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