Yamaha WR450F, Owner'S Service Manual

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ELEC
ELECTRIC STARTING SYSTEM
STARTING CIRCUIT CUT-OFF SYSTEM
OPERATION
If the main switch is set to “ON”, the starter
motor can only operate if at least one of the fol-
lowing conditions is met:
• The transmission is in neutral (the neutral
switch is closed).
• The clutch lever is pulled to the handlebar
(the clutch switch is closed).
The starting circuit cut-off relay prevents the
starter motor from operating when neither of
these conditions has been met. In this
instance, the starting circuit cut-off relay is
open so current cannot reach the starter
motor. When at least one of the above condi-
tions has been met the starting circuit cut-off
relay is closed and the engine can be started
by pressing the start switch.
WHEN THE TRANSMISSION IS
IN NEUTRAL
WHEN THE CLUTCH LEVER IS
PULLED TO THE HANDLEBAR
1
Battery
2
Main fuse
3
Main switch
4
Starting circuit cut-off relay
5
Start switch
6
Diode
7
Clutch switch
8
Neutral switch
9
Starter relay
0
Starter motor
1
2
M
3
4
5
8 7
6
9
0
ELECTRIC STARTING SYSTEM