Turn the adjusting screws to adjust the play of
the cables for the left and right throttle valves.
Play of throttle cable: .... approx. 2 mm (0.0787 in)
Connect hose of BMW Synchro to vacuum
adapter and connect cables to BMW MoDiTeC.
Start the engine.
Do not allow the engine to idle for longer than is nec-
essary, because the trim panels near the exhaust
could be damaged.
Adjust idle speed by turning the air bypass
screws while checking that the carburettors are
Idle speed: ........................................ 1,100
Make sure that both throttle valves are closed.
Do not tamper with the sealed stop screws of the
throttle valves, as otherwise the idle-speed volume
flow will have to be reset by the manufacturer.
Carefully turn the adjusting screw of the left throt-
tle valve and reduce play until the reading of the
Synchro tester changes.
Turn the adjusting screw very slightly in the op-
posite direction until the reading returns to its
Tighten the locknut to secure.
Make sure that the reading does not change when
you tighten the locknut.
Adjust throttle cable play at throttle valve so that no
play is perceptible, but the throttle valve reliably
contacts the stop screw (no strain on cable).
Adjust the right throttle valve in the same way.
Zero play can cause the throttle valves to rattle.
Use the adjusting screws (arrow) to adjust play of
the throttle cables.
Play of throttle cable:
.....................................approx. 0.5 mm (0.0197 in)
Push the rubber cap into position over the ad-