13
CARBURETOR TUNING
It is rare that this procedure is needed, usually after major modifications to the
engine or if you live in a very high altitude location.
This procedure should be performed with the engine warmed.
1. Adjust idle to 1400 rpm for 150cc or 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 ¾ turn
on 150cc, 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.
Summary of Contents for GY6
Page 18: ...18 Torque Settings for 50cc Scooter ...
Page 19: ...19 Torque Settings 150cc Scooter ...
Page 20: ...20 TORQUE SETTINGS 150CC ...
