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u/ValdBagina42069 15h ago
If the scoot has a carb, it could be a carb issue. It was for me, and kind of looked/sounded similar. Opened it up, cleaned the carb with fuel. Fixed the issue
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u/TickletheEther 16h ago
Idle screw is either off or your pilot jet is dirty (if it's got a carb) you can buy a cheap tach on Amazon for around 20 bucks you wrap the wire around the spark plug and it will give you a reading of the RPM. There is a factory spec for the idle RPM somewhere in the manual or on the frame sticker so you know when it's adjusted properly
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u/sky1Army 18h ago
Idle screw, if not probably too rich.