Generic Trigger X 50ccm Owner's Manual page 87

At this point the engine will stall（if not，inspect whether air escapes at the interface of air filter , whether the
bolt is tightened and whether the intake of the air filter is blocked).
Withdraw the mixture adjustment bolt for 1 circle.
Restart and adjust the idle adjustment screw so that the rotation speed reaches 2000-2500rpm.
Slowly adjust the mixture adjustment bolts （ anticlockwise), till the engine speed reaches its utmost （ mixture
bolt is withdrawn for two circles at most）.
Reset the idle adjustment screw and set the engine speed down to 1400±100rpm/min.
Pull the throttle for several times for acceleration and inspect whether the idle speed is steady.
Test the outlet and compare it with the specified standards.
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