9-20 ELECTRICAL SYSTEM
IGNITION SYSTEM
NOTE:
The fuel cut-off circuit is incorporated in this ECM in order to prevent over-running of engine. When engine
speed reaches 13 300 r/min, this circuit cuts off fuel at the fuel injector. But under no load, the clutch lever is
pulled or the gear position is neutral, this circuit cuts off fuel when engine speed reaches 12 900 r/min.
E-03, 33, 24: The circuit cuts off the ignition primary current for all spark plugs.

Under no load, the engine can run over 12 900 r/min though the ignition cut-off circuit is effec-
tive, which may possibly cause engine damage. Do not run the engine without load over 12 900
r/min at anytime.
ECM
TP
sensor
ECT
sensor
GP
switch
Engine stop switch
Side-
stand
relay
Fuse
Fuse
Ignition
switch
Battery
Waveform
arrangement
circuit
Waveform
arrangement
circuit
CPU
Power source
circuit
CKP
sensor
CMP
sensor
#1
#2
#3
#4
SAMPLE
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