Checking The Front Fork; Checking The Tyres - Yamaha YZF-R15 Service Manual

NOTE:
Set the torque wrench at a right angle to the
steering nut wrench.
5
Steering nut socket
YSST-721
Lower ring nut (initial tightening
torque)
48 Nm (4.8 m·kg, 35 ft·lb)
c. Loosen the lower ring nut "4" completely, and
then tighten it to specification with a steering
nut wrench.
WARNING
Do not overtighten the lower ring nut.
Lower ring nut (final tightening
torque)
13 Nm (1.3 m·kg, 9.4 ft·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 lower bracket and check the upper and
lower bearings.
Refer to "STEERING HEAD" on page 4-49.
e. Install the rubber washer "3".
f. Install the upper ring nut "2".
g. Finger tighten the upper ring nut "2", and 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.
NOTE:
Make sure the lock washer tabs "a" sit correctly
in the ring nut slots "b".
5. Install:
Upper bracket
l
4
Refer to "STEERING HEAD" on page 4-49.

CHECKING THE FRONT FORK

1. Stand the vehicle on a level surface.
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
2. Check:
Inner tube
l
Damage/scratches → Replace.
Oil seal
l
Oil leakage → Replace.
3. Hold the vehicle upright and apply the front
brake.
4. Check:
Front fork operation
l
Push down hard on the handlebar several
times and check if the front fork rebounds
smoothly.
Rough movement → Repair.
Refer to "FRONT FORK" on page 4-41.

CHECKING THE TYRES

The following procedure applies to both of the
tyres.
1. Check:
• Tyre pressure
Out of specification → Regulate.
3-22
CHASSIS