Yamaha YBR250 2007 Service Manual page 118

FRONT WHEEL AND BRAKE DISC
1
2. Find
• heavy spot "x" (unbalance)
NOTE:
Place the front wheel over a suitable stand for
balancing.
a. Spin the front wheel.
b. When the wheel stops, make a "x" mark at its
lowest part found.
c. Rotate the front wheel 90
is positioned as shown.
d. Release the front wheel.
e. When the wheel stops, make a "x2" mark at its
lower part.
f. Repeat the steps "d" to "e" several times until
the marks start matching.
g. The medium point where the marks matched is
the front wheel's heavy spot "x".
3. Adjust:
• wheel static balancing
a. Install a balancing weight 1 to the wheel at the
exactly opposite place to the "x" weight point.
NOTE:
Start with a lighter weight.
b. Rotate the wheel at 90
be positioned as shown.
c. If the weight point do not reach this position,
install a larger weight.
d. Repeat steps (b) and (c) until the front wheel is
balanced.
4. Check:
• Wheel static balancing
a. Rotate the wheel and make sure that it can be
in every position shown.
b. If the wheel could not stop in all the positions,
performance the balance again.
4-9
CHAS
o
so that the "x" mark
o
so that the weight point