Yamaha YZF-R1S, Service Manual

Page: 129 / 457

3-52
CHECKING AND ADJUSTING THE STEERING HEAD
CHK
ADJ
WARNING
NOTE:
NOTE:
c. Loosen the lower ring nut 4 completely, then
tighten it to specification.
Do not overtighten the lower ring nut.
Lower ring nut
(final tightening torque)
18 Nm (1.8 m
S
kg, 13 ft
S
lb)
d. Check the steering head for looseness or
binding by turning the front fork all the way in
both directions. If any binding is felt, remove
the under bracket and check the upper and
lower bearings.
Refer to “STEERING HEAD” in chapter 4.
e. Install the rubber washer 3 .
f. Install the upper ring nut 2 .
g. Finger tighten the upper ring nut 2 , then
align the slots of both ring nuts. If necessary,
hold the lower ring nut and tighten the upper
ring nut until their slots are aligned.
h. Install the lock washer 1 .
Make sure the lock washer tabs
a
sit correctly
in the ring nut slots
b
.
5. Install:
S
upper bracket
Refer to “HANDLEBAR” and “STEERING
HEAD” in chapter 4.
6. Measure:
S
steering head tension
Make sure all of the cables and wires are prop-
erly routed.
a. Point the front wheel straight ahead.
b. Install a plastic locking tie
1 loosely around
the end of the handlebar as shown.
c. Hook a spring gauge 2 onto the plastic lock-
ing tie.
d. Hold the spring gauge at a 90
_
angle from the
handlebar, pull the spring gauge, and then
record the measurement when the handle-
bar starts to run.