How to adjust the throttle opening of the old China Jie Jun

1. First unscrew the throttle, adjustment screw makes the engine reach the lowest stable speed, and then put the screwdriver on the idle screw.

2. Secondly, when the engine is about to stall, slowly loosen the idle screw with a screwdriver to make the engine run stably and reach high speed, and then loosen the throttle screw to minimize the engine speed from high speed.

3. Finally, unscrew the screw to increase the engine speed, and so on, until the throttle opening is minimum, and suddenly close the throttle.