Checking The Front Fork Legs - Yamaha YZ250X 2022 Owner's Service Manual

5. Remove:
• Base valve "1"
(from the damper assembly)
TIP
Hold the damper assembly with the cap bolt ring
wrench "2" and use the cap bolt wrench "3" to re-
move the base valve.
Cap bolt wrench
90890-01500
Cap bolt wrench
YM-01500
Cap bolt ring wrench
90890-01501
Cap bolt ring wrench
YM-01501
3
2
EAM30057

CHECKING THE FRONT FORK LEGS

1. Check:
• Inner tube surface
Scratches  Repair or replace.
Use #1000 grit wet sandpaper.
Damaged oil lock piece  Replace.
• Inner tube bends
Out of specification  Replace.
Use the dial gauge.
Inner tube bending limit
0.2 mm (0.01 in)
TIP
The bending value is shown by one half of the
1
4-41
dial gauge reading.
EWA13650
WARNING
Do not attempt to straighten a bent inner
tube as this may dangerously weaken it.
2. Check:
• Outer tube
Scratches/wear/damage  Replace.
3. Measure:
• Fork spring free length "a"
Out of specification  Replace.
Fork spring free length limit
449.0 mm (17.68 in)
G088921
4. Check:
• Damper assembly "1"
Bend/damage  Replace.
• O-ring "2"
Wear/damage  Replace.
ECA14200
NOTICE
• The front fork leg has a built-in damper ad-
justing rod and a very sophisticated inter-
nal construction, which are particularly
sensitive to foreign material.
• When disassembling and assembling the
front fork leg, do not allow any foreign ma-
terial to enter the front fork.
2
5. Check:
• Base valve "1"
Wear/damage  Replace.
FRONT FORK
1