124 Adjustments for Competition
Front Suspension Adjustments
15. Drain the extra oil from the oil holes (7) of the
fork damper oil/spring chamber (8).
By doing above procedure, about 10 cm
3
(0.3 US
oz, 0.4 Imp oz) of fork fluid will be drained from
the damper oil/spring chamber through the oil hole
and cause 205 cm
3
(7.0 US oz, 7.2 Imp oz) of fork
fluid to be left in the chamber.
Pour the drained oil into a suitable container and
dispose of it in an approved manner (page 148).
Improper disposal of drained fluids is harmful to
the environment.
1. Drain the fork oil from the fork assembly (1)
by placing it upside down.
(About 9.8 cm
3
(0.3 US oz, 0.3 Imp oz) of fork
oil will be left in the outer tube/slider when it is
left inverted for about 20 minutes at 20°C/68°F)
To properly dispose of drained fluids, refer to You
& the Environment (page 148).
Improper disposal of drained fluids is harmful to
the environment.
2. Tighten the fork centre bolt lock nut (2) fully
and measure the thread length (A) as shown.
Standard: 16 – 18 mm (0.6 – 0.7 in)
Wipe the oil completely off the fork damper.
3. Blow out the oil completely off the fork spring
(3) using compressed air.
Install the fork spring and spring retainer (4) to
the fork damper assembly (5).
Install the fork damper assembly to the fork
assembly (1).
(7) oil holes
(8) fork damper oil/spring chamber
Fork Assembly
(1) fork assembly
Amount of fork oil left in the fork
(without damper and spring) unit: cm
3
minute
°C/°F
5 1020355585145
0/32 16.1 14.2 12.4 10.8 9.8 8.4 7.0
10/50 14.9 12.5 11.3 9.5 8.0 6.9 5.8
20/68 13.2 11.4 9.8 7.8 6.6 5.1 4.7
30/86 12.5 10.2 8.2 6.9 5.8 4.4 3.6
Inverted time
0°C/32°F
10°C/50°F
20°C/68°F
30°C/86°F
Amount of fork oil
(cm
3
)
(minutes)
(2) fork centre bolt lock nut (A) thread length
(1) fork assembly (4) spring retainer
(3) fork spring (5) fork damper assembly
CRF450R.book Page 124 Thursday, July 8, 2010 9:34 AM
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