Carb Tuning Help

[whitney1207]

I downloaded a manual online for my 50cc scooter. I've been having problems with it so i cleaned the carb out but i need help tuning it.

According to the manual: http://www.chinesescooterreference.c...otermanual.pdf

1. Adjust idle 1800 rpm for the 50cc with idle screw.
2. Turn air/fuel mix (fuel volume regulation) screw all the way in gently.
The engine should stop.
3. Turn the air/fuel mix screw out 1 ½ turns on the 50cc.
4. Start engine and increase idle (with idle screw) to a fast idle.
5. Slowly turn the air/fuel mix screw out until maximum idle speed is
achieved.
6. Readjust idle screw to proper idle speed.
7. Check for stability by accelerating a few times. If engine doesn t
accelerate smoothly, readjust.


1. i have to adjust the idle to more like 14-1500 to get it to cut out with the air fuel screw all the way in.

2. They say adjust to a "fast idle" and I dont know what that is. (I tried 2000 RPM's)

3. When i keep backing the air/fuel screw out it does not increase the idle at all.