Re: Suzuki Carbs.
The book says to use one to balance the carbs. I have a 1987 DT85 which is a similar setup setup as yours I think. If you have the little plastic adjustable turnbuckles you don't really need the air flow meter. Just make sure that when the carb throttle linkage to the ignition is disconnected, all 3 carbs completely close their butterflies. If not use the turnbuckles that connect all 3 carbs to set them closed. Then set the static ignition timing by the book and you should be good to go.