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124 Adjustments for Competition
Front Suspension Adjustments
Balance Chamber Air Pressure
When adjusting the left fork air pressure, adjust the
inner chamber air pressure first, then adjust the
balance chamber air pressure.
1. Place an optional workstand under the engine,
so that the front wheel is off the ground.
2. Adjust the inner chamber air pressure
(page 123).
3. Remove the valve cap (1) and clean the area
around the balance chamber air valve (2).
4. Place a shop towel over the balance chamber
air valve.
5. Release the air pressure from the balance
chamber by pressing the valve center.
When releasing air pressure from the balance
chamber, the fork will be extended.
Spraying a small amount of fork oil from the
balance chamber air valve is normal when
releasing air pressure from the balance chamber.
This will not affect the fork performance.
6. Adjust the balance chamber air pressure.
When applying air pressure to the balance
chamber, the fork will be shortened.
Do not adjust the balance chamber air pressure to a
level that is outside the minimum or maximum
level.
The correct “cold” balance chamber air pressures
are:
Standard: 163 psi (1,125 kPa, 11.5 kgf/cm
2
)
The higher or lower balance chamber air pressure
affects the initial range of fork travel.
7. Check that there is no air leakage. If there is
any air leakage, replace the air valve assembly.
8. Check that the valve cap is in good condition
and replace it if necessary.
9. Install and tighten the valve cap to the
specified torque:
0.4 lbf·ft (0.5 N·m, 0.1 kgf·m)
Left Fork Outer Tube Oil capacity
To adjust the oil capacity refer to Outer Tube Fork
Oil Replacement on page 91.
Oil capacities are:
Standard: 10.5 US oz (310 cm
3
)
When adjusting oil capacity, bear in mind that the
air in the fork will increase in pressure while
riding; therefore, the higher the oil capacity, the
higher the eventual pressure of any air in the fork.
The higher or lower left fork outer tube oil capacity
affects the final range of fork travel.
(1) valve cap
(2) balance chamber air valve
(1)
(2)
soft (maximum) 189 psi (1,300 kPa, 13.3 kgf/cm
2
)
standard 163 psi (1,125 kPa, 11.5 kgf/cm
2
)
stiff (minimum) 145 psi (1,000 kPa, 10.2 kgf/cm
2
)
with standard inner chamber air pressure and standard
oil capacity:
Stroke (mm)
Force (N)
stiff (minimum)
standard
soft (maximum)
soft (minimum) 10.1 US oz (300 cm
3
)
standard 10.5 US oz (310 cm
3
)
stiff (maximum) 12.3 US oz (365 cm
3
)
with standard inner chamber air pressure and balance
chamber air pressure:
Stroke (mm)
Force (N)
stiff (maximum)
standard
soft (minimum)
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