Appreciating all the above infos and suggestions. Thanks ..

Based on all above, my low speed needle valve should be hidden behind a blackened 8mm needle plug (not to far from the fuel nipple). Then, there is an idle mixture screw (small flathead a assume, ), that you access through a hole on the side of the throttle arm.

Will try your above instructions as soon as the rain slows and write the updates. If what I wrote seems off, let me know.

Thanks again,