Warning! Securely support the vehicle so that there is no danger of it falling over.
Note: Place the vehicle on a suitable stand so that the front wheel is elevated.
2. Check:
- Steering head
Grasp the bottom of the front fork legs and gently rock the front fork.
Binding/looseness → Adjust the steering head.
3. Remove:
- Upper bracket. Refer to «Steering head».
4. Adjust:
- Steering head
a. Remove the lock washer «1», the upper ring nut «2», and the rubber washer «3».
b. Loosen the lower ring nut «4» and then tighten it to specification with a steering nut wrench «5».
Note: Set the torque wrench at a right angle to the steering nut wrench.
Steering nut wrench 90890-01403: Spanner wrench YU-33975.
Lower ring nut (initial tightening torque): 52 Nm (5.2 m·kg, 38 ft·lb).
c. Loosen the lower ring nut «4» completely, and then tighten it to specification.
Warning! Do not overtighten the lower ring nut.
Lower ring nut (final tightening torque): 18 Nm (1.8 m·kg, 13 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».
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».
Note: Make sure the lock washer tabs «a» sit correctly in the ring nut slots «b».
5. Install:
- Upper bracket. Refer to «Steering head».
6. Measure:
- Steering head tension
Note: Make sure all of the cables and wires are properly 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 locking tie.
d. Hold the spring gauge at a 90° angle from the handlebar, pull the spring gauge, and then record the measurement when the handlebar starts to run.
Steering head tension: 200-500 g
e. Repeat the above procedure on the opposite handlebar.
f. If the steering head tension is out of specification (both handlebars should be within specification), remove the upper bracket and loosen or tighten the upper ring nut.
g. Reinstall the upper bracket and measure the steering head tension again as described above.
h. Repeat the above procedure until the steering head tension is within specification.
i. Grasp the bottom of the front fork legs and gently rock the front fork.
Binding/looseness → Adjust the steering head.