Thankyou for the pic on a number of levels. #1 I have never seen an electric choke on a Mikuni, and #2 verifying that the adjustment technique is the same as an electric choked Weber carb. Have you worked out how to hook up the vacuum solenoid next to the choke cam gear? I think it would have a thermal switch somewhere telling it when to release it at operating temperature (my guess anyway) I also think you have a relatively rare carb in your hands and I would then wonder about the manifold you removed it from. Was it from another 4G54 engine and do you remember what vehicle? This could be very handy resource material for future reference