28mm pwk carb troubleshooting

[animo808]

aloha,

I have a 2015 sym dd50 and when I kick staRT IT the bike accelerates into 7000 rpm. my idle screw is down, I cleaned the carb don't know what the problem is. carb I have is a Polini 28mm pwk main jet 118 / Pilot 45

[Lucass2T]

Throttle cable too tight or a massive air leak.
Look down the venturi to see if the slide is opened at rest.
And do a brake clean test by spraying all the mating surfaces liberally. Ofcourse with a running motor. If the motor by itself responds to the brake clean, you have an air leak.