What to do if my bike does not stay on? It turns off on its own! - Adjusting the idle screw on all 49cc engines! - Bike wants to take off on its own when idling? How do I adjust the idle?
*NOTE: THIS WILL WORK ON MOST AND/OR ALL 43CC, 47CC, 49CC, AND 50CC ENGINES*
On the left side of your bike when you are sitting on it, look inside the bike, and you will see a gold screw with a spring on it (as shown in image5 with the red arrow). Sometimes the screw may be another color than gold; look for the one with the spring around it. This is your idle screw!
If your bike does not stay on, and seems to turn off on its own:
Tighten the idle screw and this will constantly give gas to the bike. DO NOT TIGHTEN TOO MUCH. Tighten the idle screw clockwise A LITTLE BIT. The more you tighten (clockwise) the more throttle you are giving to the bike. Tighten the idle screw no more than 2 turns at a time to adjust properly. You will need to adjust the idle a few times until you find the perfect setting for your bike.
If your bike wants to take off on its own when idling:
Loosen the idle screw. Too much throttle is being given to the bike, which makes it want to run on its own. DO NOT LOOSEN TOO MUCH. Turn the idle screw counter-clockwise LITTLE BY LITTLE. The more you loosen (counter-clockwise) the idle screw, the less throttle being given to the bike and can give you a hard time starting your bike. Loosen the idle screw no more than 2 turns at a time to adjust properly. You will need to adjust the idle a few times until you find the perfect setting for your bike.