Yamaha YZ 2019 Series, Owner'S Service Manual

Page: 170 / 398

FRONT FORK
4-42
oils may have an adverse effect on front
fork performance.
• When disassembling and assembling the
front fork leg, take care not to allow any for-
eign material to enter the front fork.
3. After filling, pump the damper assembly “1”
slowly up and down (about 200 mm (7.9 in)
stroke) several times to bleed the damper as-
sembly of air.
TIP
Avoid excessive full stroke. A stroke of 200 mm
(7.9 in) or more will cause air to enter. In this
case, repeat the steps (1) to (3).
4. Measure:
• Oil level (left and right) “a”
Out of specification

Regulate.
5. Tighten:
• Locknut “1”
TIP
Fully finger tighten the locknut onto the damper
assembly.
6. Loosen:
•
Compression damping force adjuster “1”
TIP
•
Before loosening the damping force adjuster,
record the setting position.
•
Unless the damping force adjuster is fully loos-
ened, correct damping characteristic cannot be
obtained after installation.
7. Install:
• Base valve “1”
(to the damper assembly “2”)
TIP
First bring the damper rod pressure to a maxi-
mum. Then install the base valve while releasing
the damper rod pressure.
Standard oil level
145–148 mm (5.71–5.83 in)
From top of fully stretched
damper assembly.
1
a
1
1
2