Vacuum Advance System - Honda Gold Wing GL1200D Shop Manual

~HONDA
~GL1200D'GL1200A
VACUUM ADVANCE SYSTEM
Open the top compartment.
Disconnect the vacuum tube that goes to the
ignition control unit from the 3.way joint.
Connect the vacuum pump to this tube.
Remove the plug from the dead end tube and con-
nect the dead end tube to the 3-way joint as shown.
Ground the REDIWHITE or GREEN/ORANGE
terminal of shift sensor coupler to the ground.
Start the engine and let
it
run at 2,800-3,200
min-!
(rpm).
Apply vacuum to the vacuum tube and check the
reference mark movement.
The advance starts at 36-44 rnm (1.4-1.7 in) Hg
applied.
The advance ceases at 63-77 mm (2.5-3.0 in) Hg
applied.
If ignition timing is not correct, check all individual
ignition system components except the ignition
control unit. If the individual components are good,
replace the ignition control unit.
IGNITION SYSTEM
3·WAY JOINT IGNITION CONTROL UNIT
-,~ I
~
DEAD END TUBE \
VACUUM PUMP
REFERENCE
MARK
1/
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C:::'-!;::'l
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