I just studied and bare in my mind followings:
The motor must be warm up enough conditioned and choke must be fully opened.
Throttle position screw must be set so precisely as to attain the point to 1/4 turn screwed in and the screw would not appear later adjustment, firmly fixed untouched later, never!
Because the idle speed would be adjusted only by bypass screw, but for this screw no way to adjust the idle speed 800-850 rpm.
While adjusting air volume control screw with closing in, the sweetest point must be within 1/2 turn(mostly out) gaining idle speed.
The rate of initial turning out of both bypass screw and air volume control screw are 2 plus 1/2 turn from the closed positions.
The air volume control screw would not be turned exceeding 1/2 turn, so adjusted position exists between 2-3 turns out position.
Always try to keep the idle speed at 800-850 rpm by adjusting only bypass screw.
Finally volume control screw must be closes in until rotation looses 25 rpm(slightly leaner).
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