Yamaha WR250FM 2021, Owner'S Service Manual

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FRONT WHEEL
4-7
EAM30017
REMOVING THE FRONT WHEEL
NOTICE
ECA22340
• Keep any type of magnets (including mag-
netic pick-up tools, magnetic screwdrivers,
etc.) away from the speed sensor or speed
sensor rotor; otherwise, the sensor or rotor
may be damaged, resulting in improper op-
eration.
• Do not drop the speed sensor rotor or sub-
ject it to shocks.
• If any solvent gets on the speed sensor ro-
tor, wipe it off immediately.
1. Use a maintenance stand to raise the front
wheel off the ground.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
• Front wheel
EAM30474
CHECKING THE FRONT WHEEL SENSOR
AND SENSOR ROTOR
NOTICE
ECA21630
• The speed sensor cannot be disassembled.
Do not attempt to disassemble it. If faulty,
replace with a new one.
• Keep magnets (including magnetic pick-up
tools, magnetic screwdrivers, etc.) away
from the speed sensor.
• Do not drop or shock the speed sensor or
the speed sensor rotor.
1. Check:
•
Front wheel sensor “1”
Cracks/bends/distortion

Replace.
Iron powder/dust

Clean.
2. Check:
•
Front wheel sensor rotor “1”
Cracks/damage/scratches

Replace the
front wheel sensor rotor.
Iron powder/dust/solvent

Clean.
TIP
•
The wheel sensor rotor is installed on the inner
side of the wheel hub.
•
When cleaning the wheel sensor rotor, be
careful not to damage the surface of the sensor
rotor.
3. Check:
• Damper
Cracks/damage

Replace the damper.
EAM30019
DISASSEMBLING THE FRONT WHEEL
1. Remove:
• Oil seal
•
Bearing
a. Clean the outside of the front wheel hub.
b. Remove the oil seals “1” with a flat-head
screwdriver.
TIP
To prevent damaging the wheel, place a rag “2”
between the screwdriver and the wheel surface.
1
1