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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bolt is withdrawn for two circles at most).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.