Yamaha YZF-R125 Service Manual: Adjusting the front wheel static balance
NOTE:
- After replacing the tire, wheel or both, the front wheel static balance should be adjusted.
- Adjust the front wheel static balance with the brake discs installed.
1. Remove:
- Balancing weight(s)
2. Find:
- Front wheel's heavy spot
NOTE:
Place the front wheel on a suitable balancing stand.
a. Spin the front wheel.
b. When the front wheel stops, put an "X1" mark at the bottom of the wheel.
c. Turn the front wheel 90 so that the "X1" mark is positioned as shown.
d. Release the front wheel.
e. When the wheel stops, put an "X2" mark at the bottom of the wheel.
f. Repeat steps (c) through (e) several times until all the marks come to rest at the same spot.
g. The spot where all the marks come to rest is the front wheel's heavy spot "X".
3. Adjust:
- Front wheel static balance
a. Install a balancing weight "1" onto the rim exactly opposite the heavy spot "X".
NOTE:
Start with the lightest weight.
b. Turn the front wheel 90 so that the heavy
spot is positioned as shown.
c. If the heavy spot does not stay in that position, install a heavier weight.
d. Repeat steps (b) and (c) until the front wheel is balanced.
4. Check:
- Front wheel static balance
a. Turn the front wheel and make sure it stays at
each position shown.
b. If the front wheel does not remain stationary at all of the positions, rebalance it.
Assembling the front wheel
1. Install:
Wheel bearings
Oil seal
a. Install the new wheel bearings and oil seal in
the reverse order of disassembly.
CAUTION:Do not contact the wheel bearing inner
race
" ...
Installing the front wheel (disc)
1. Install:
Front brake disc
NOTE:
Be sure to install the front brake disc with the
arrow mark "a" on the disc facing out.
Tighten the brake disc bolts in stages and in a
crisscross p ...
Other materials:
Sidestand
The sidestand is located on the left side
of the frame. Raise the sidestand or
lower it with your foot while holding the
vehicle upright.
TIP
The built-in sidestand switch is part of
the ignition circuit cut-off system, which
cuts the ignition in certain situations.
WARNING
The vehicl ...
Troubleshooting
The ignition system fails to operate (no spark or intermittent spark).
NOTE:
Before troubleshooting, remove the following part(s):
1. Seats
2. Fuel tank
3. Right side cover
4. Left side panel
5. Left upper side cowling
...
Engine break-in
There is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the following
material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 mi). The vari ...