Yamaha WR450F, Owner'S Service Manual

Page: 690 / 794

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ELEC
6 - 7
ELECTRIC STARTING SYSTEM
INSPECTION STEPS
If the starter motor will not operate, use the following inspection steps.
*1 marked: Refer to “FUSE INSPECTION” section in the CHAPTER 3.
*2 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
*3 marked: Refer to “MAIN SWITCH INSPECTION” section.
*4 marked: Refer to “NEUTRAL SWITCH INSPECTION” section.
NOTE:
• Remove the following parts before inspection.
1) Seat
2) Rear fender
• Use 12 V battery in this inspection.
• Use the following special tools in this inspection.
*1 Check fuse.
Replace fuse and
check wire harness.
*2 Check battery. Recharge or replace.
Check each coupler and
wire connection.
Repair or replace.
*3 Check main switch. Replace.
Check starter motor
operation.
Repair or replace.
Check starting circuit
cut-off relay.
Replace.
Check starter relay. Replace.
*4 Check neutral switch. Replace.
Check clutch switch. Replace.
Check diode. Replace.
Check start switch. Replace.
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
Pocket tester:
YU-3112-C/90890-03112