Checking freedom of throttle cable, checking for chaffing and kinks, replacing if necessary Checking throttle-cable play Checking and adjusting idle speed and throttle-valve synchronisation • Connect hose of BMW Synchro to vacuum adapter and connect cables to BMW MoDiTeC. • Adjust idle speed by turning the air bypass screws while checking that the carburettors are balanced. Idle speed: .......................................1,100 ±50 rpm L Note: Make sure that both throttle valves are closed. (Inspections I, II and III) • Test-drive the motorcycle until the engine is warm, or allow the engine to idle for approxi- mately 10 minutes. e Caution:
Do not allow the engine to idle for longer than 20 minutes. e Caution: 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 • Turn the adjusting screw very slightly in the op- posite direction until the reading returns to its original value. • Tighten the locknut to secure. L Note: Make sure that the reading does not change when you tighten the locknut. • Push back rubber cap (arrow) on throttle and choke cables. • Use the adjusting screws to adjust play of throttle and choke cables. Play of choke cable: .......... approx. 1 mm (0.04 in) Play of throttle cable: ........ approx.
1 mm (0.04 in) • Adjust the right throttle valve in the same way. L Note: Zero play can cause the throttle valves to rattle. S000100 • 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 (0.08 in) 00.38 Oil temperature:...................at least 90 °C (130 °F) S000100 • Carefully turn the adjusting screw of the left throt- tle valve and reduce play until the reading of the R21000350 Synchro tester changes. S000100 R21000350 S000100 R21000350