Yamaha WR450FN 2022, Owner'S Service Manual

Page: 125 / 402

ELECTRICAL SYSTEM
3-35
EAM20137
ELECTRICAL SYSTEM
EAM30256
CHECKING AND CHARGING THE BATTERY
Refer to “CHECKING AND CHARGING THE
BATTERY” on page 8-60.
EAM30505
CHECKING THE FUSES
Refer to “CHECKING THE FUSES” on page
8-59.
EAM30255
CHECKING THE IGNITION TIMING
1. Remove:
•
Timing mark accessing screw “1”
2. Attach:
•
Timing light “1”
• Digital tachometer “2”
(to the high tension cord “3”)
3. Adjust:
•
Engine idling speed
Refer to “CHECKING THE ENGINE IDLING
SPEED” on page 3-12.
4. Check:
• Ignition timing
Check whether the alignment mark “a” on the
left crankcase cover is within the firing range
“b” on the generator rotor.
Incorrect firing range

Check generator ro-
tor and crankshaft position sensor.
5. Install:
•
Timing mark accessing screw
EAM30339
REPLACING THE HEADLIGHT BULB
WARNING
EWA13320
Since the headlight bulb gets extremely hot,
keep flammable products and your hands
away from the bulb until it has cooled down.
1. Remove:
• Headlight unit bolt “1”
TIP
After you have removed the headlight unit bolts,
lift and remove the headlight unit.
2. Remove:
• Headlight coupler “1”
•
Bulb cover “2”
Timing light
90890-03141
Timing light
YU-03141
Digital tachometer
90890-06760
Digital tachometer
YU-39951-B
1
1
2 2
3 3
Timing mark accessing screw
6 N·m (0.6 kgf·m, 4.4 lb·ft)
a a
b b
T
R
.
.
1 1