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Adjustments for Competition 121
Front Suspension Adjustments
4. Place the lower end (axle holder) of the slider
in a vise with a piece of wood or soft jaws to
avoid to damage.
NOTICE
Over-tightening the vise can damage the axle
holder.
5. Push out the fork damper piston rod from the
axle holder of the slider by pushing the fork
damper.
Apply pressure to the fork damper and insert
the piston base (5) or mechanic's stopper tool
between the axle holder and fork center bolt
lock nut (2).
Measure the thread length again.
Standard: 0.4 – 0.5 in (11 – 13 mm)
6. Install the push rod (6) into the fork damper
piston rod until it stops.
Check the push rod installation by turning the
push rod right and left.
7. Apply fork oil to a new O-ring (7) and install
it to the fork center bolt (8). Install the fork
center bolt to the fork damper piston rod
aligning the adjusting rod (9) with the push
rod. Tighten the fork center bolt fully by
hand.
(8)
(7)
(9)
(5)
(2)
(6)
(2) fork center bolt lock nut (7) O-ring
(5) piston base (8) fork center bolt
(6) push rod (9) adjusting rod
8. Measure the length of the fork center
bolt lock nut (2) and fork center bolt (8)
clearance.
Standard: 0.06 – 0.08 in (1.5 – 2.0 mm)
If the clearance is out of specification, check
the fork center bolt lock nut and fork center bolt
installation.
(2)
(8)
(2) fork center bolt lock nut
(8) fork center bolt
9. Tighten the fork center bolt lock nut (2)
to the fork center bolt (8) closely by hand.
Tighten the fork center bolt lock nut to the
specified torque:
16 Ibf·ft (22 N·m, 2.2 kgf·m)
(8)
(2)
(2) fork center bolt lock nut
(8) fork center bolt
10. Remove the piston base or mechanic's stopper
tool while pushing to the fork damper. Apply
locking agent to the fork center bolt threads.
Install the fork center bolt (8) to the axle
holder and tighten it to the specified torque:
51 Ibf·ft (69 N·m, 7.0 kgf·m)
(8)
(8) fork center bolt
11. Measure the length (10) between the axle
holder and outer tube.
Standard: 12.5 ± 0.1 in (317 ± 2 mm)
12. Compare the length at assembly and at
disassembly. They should be the same length.
If the length at assembly is longer than at
disassembly, check the fork center bolt and lock
nut installation.
(10)
(10) length
(cont’d)
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