to adjust your choke, start with a cold engine. Crack the throttle to set the choke. Loosen the 3 screws that hold the cap on and turn the cap to close the butterfly, and tighten the screws.
There are 2 idle adjustment screws on the metering plate (the vertical plate right behind the fuel bowl), adjust these in/out until you get maximum vacuum.
Most likely you will have to go up a jet size or two. You've got more efficient air flow, so you need to up the fuel delivery to match. The good news is that you'll be making more power!
I'll try to find a pic or diagram for you.
Paul
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