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Honda CRF450RL 2021 Owner's Manual & Off-Road Handbook page 95

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Remove the following from the fork assembly [1]:
– Fork damper assembly [2]
– Fork spring [3]
[2]
[3]
Place the fork [1] upside down and drain the fork oil from
the inside of the outer tube and slide pipe.
By standing time and temperature, the amount of
remaining oil in the fork is varied.
For more details, refer to the following table (for example,
the amount of remaining oil is 5.4 cm
20 minutes).
Amount of remaining fork oil after draining (The fork
damper and spring is removed)
30/86
20/68
10/50
0/32
[1]
minutes
5
10
20
6.5
5.7
5.2
6.7
6.2
5.4
7.3
6.4
5.6
8.6
8.2
7.9
[1]
Amount of
0°C (32°F)
3
fork oil (cm
)
10°C (50°F)
Inverted time (minutes)
Maintenance
3
at 20°C/ 68°F, for
unit: cm
3
35
55
85
145
4.5
4.1
3.7
3.3
4.7
4.4
3.8
3.5
5.0
4.6
4.2
3.8
7.6
7.3
6.8
6.0
20°C (68°F)
30°C (86°F)
2-69

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