Yamaha WR250F(V) Owner's Service Manual page 786

INSPECTION STEPS
If the starter motor will not operate, use the following inspection steps.
*1 Check fuse.
OK
*2 Check battery.
OK
Check each coupler and wire
connection.
OK
*3 Check main switch.
OK
Check starter motor operation.
OK
Check starting circuit cut-off relay.
OK
Check starter relay.
OK
*4 Check neutral switch.
OK
Check clutch switch.
OK
Check diode.
OK
Check start switch.
*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.
Pocket tester:
YU-3112-C/
90890-03112
ELECTRIC STARTING SYSTEM
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
6 - 23
– +
ELEC
Replace fuse and check
wire harness.
Recharge or replace.
Repair or replace.
Replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.