Yamaha YZF R1 2021 Owner's Manual page 66

Instrument and control functions
WARNING
The front fork legs contain highly
pressurized nitrogen gas. Read and
understand the following informa-
tion before handling the front fork
legs.
 Do not subject the axle brackets
to open flame or other heat
source. This may cause the
5
units to explode due to exces-
sive gas pressure.
 Do not attempt to open the gas
cylinder assemblies.
 Do not deform or damage the
cylinders in any way. Cylinder
damage will result in poor
damping performance.
 Do not dispose of a damaged or
worn-out front fork leg yourself.
Take the front fork leg to a
Yamaha dealer for disposal.
Spring preload
1. Turn the vehicle off.
2. Slide the rubber cover back at
each coupler.
3. Remove the coupler on each front
EWA20900
fork. NOTICE: To prevent dam-
aging the couplers, do not use
sharp tools or excessive force.
[ECA22770]
2
1. Rubber cover
2. Coupler
4. Turn the adjusting bolt in direction
(a) to increase the spring preload.
Turn the adjusting bolt in direction
(b) to decrease the spring preload.
To set the spring preload, turn the
adjuster in direction (b) until it
stops, and then count the turns in
direction (a).
1
1. Spring preload adjusting bolt
TIP
When turning the spring preload ad-
juster in direction (a), it may turn be-
yond
however such adjustments are ineffec-
tive and may damage the suspension.
5. Attach the coupler on each fork.
6. Slide the rubber cover to the orig-
5-42
1
(a)
Spring preload setting:
Minimum (soft):
0 turn(s) in direction (a)
Standard:
3 turn(s) in direction (a)
Maximum (hard):
15 turn(s) in direction (a)
the stated specifications,
inal position.
(b)