1996 ELPTO 2X2 Won't idle down

by Bob
(Beach Park,Il)

Can't get idle below 2000 rpm's after carb cleaning and new control box.I don't want to start adjusting timing settings and the idle position doesnt touch accelerator.Carbs may need to be sync but seem to all accelerate at same time.
If i usr rich/lean screw on top two carbs it will come down but smokes bad and runs terrible.....ideas?

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