Balancing throttle bodies

[ROCKETHEAD]

Mine is the same maybe they have changed the way the throttle shaft is connected in the newer bikes(Roadster) as I know if I adjust the front screw between #1 and #2 the butterfly in #1 moves not #2 and if i adjust the rear screw between #2 and #3 it moves the #3 butterfly and the reference to not being able to adjusted by using vacuum is because the old school multiple carby / cylinder bikes used to need a set of Vucuum Gauges to balance the carbies

They must have changed, old binder manual states it differently than new pdf version, I stand corrected...