A clean carburetor will bring out the best in your Yamaha scooter's engine performance. A dirty carburetor will lead to issues like engine stalling, rough idling and poor acceleration. When you clean the carburetor, the primary goal is to remove the fuel residue that builds up inside the carburetor chambers as the fuel sits. Along with removing the residue, you should inspect the carb for any faulty parts or debris that may hinder the carb's ability to function properly.
Place the carburetor into the wash basin, ensuring that the drain hole of the tray or basin is plugged.
Spray carb cleaner into each orifice of the assembled carb, clearing all initial passages of fuel residue and potential debris. Spray the body of the carb as well, to clean any grease away.
Remove the fuel bowl from the base of the carburetor with a screwdriver, taking care to avoid damaging the head of the screws. Pull the bowl away from the carb, preserving the gasket that presses between the bowl and the primary body of the carb.
Spray carb cleaner in the bowl, directly spraying the fuel float and all walls of the bowl. If any fuel residue remains, scrub it away gently with the toothbrush. Spray inside the base of the main carb body, in each of the orifices you see. Again, scrub away any stubborn residue or debris from the main body's base.
Blow the interior components of the carb with compressed air again to remove any stubborn debris, especially from the holes and ports, where small debris can become lodged.
Place the bowl gasket on the bowl and press the bowl against the base of the carburetor. Screw the bowl screws tight with the screwdriver, ensuring the gasket is not pinched or kinked. If this occurs, loosen the bowl screws and properly align the gasket so it can make a tight seal. With the bowl screws tightened, the cleaning process is complete. You'll now have clean carb walls, jets, ports and floats.
