Yamaha YZF-R1 Series Service Manual page 444

EAS30494
STARTING CIRCUIT CUT-OFF SYSTEM OPERATION
If the main switch is turned to "ON" and the " " side of the start/engine stop switch is pushed, the starter
motor can only operate if at least one of the following 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) and the sidestand is up (the
sidestand switch is closed).
The starting circuit cut-off relay prevents the starter motor from operating when neither of these condi-
tions 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 conditions has been met, the starting circuit cut-off relay
is closed and the engine can be started by pressing the " " side of the start/engine stop switch.
a. WHEN THE TRANSMISSION IS IN NEUTRAL
b. WHEN THE SIDESTAND IS UP AND THE
CLUTCH LEVER IS PULLED TO THE
HANDLEBAR
1. Battery
2. Main fuse
3. Main switch
4. Ignition fuse
5. Starting circuit cut-off relay
6. Relay unit (diode)
7. Clutch switch
8. Sidestand switch
9. Neutral switch
10. Start/engine stop switch
11. Starter relay
12. Starter motor
ELECTRIC STARTING SYSTEM
12
11
1
2
3
4
6 6
10
5
6
6
7 a
6
9
8
b
8-9
10