Yamaha 2009 YFM25RY, Service Manual, Page: 108 / 293

FRONT WHEEL
4-7
EAS21970
ADJUSTING THE FRONT WHEEL STATIC
BALANCE
TIP
After replacing the tire, wheel or both, the front
wheel static balance should be adjusted.
1. Remove:
• Balancing weight(s)
2. Find:
• Front wheel’s heavy spot
TIP
Place the front wheel on a suitable balancing
stand.
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a. Spin the front wheel.
b. When the front wheel stops, put an “X
1
”
mark at the bottom of the wheel.
c. Turn the front wheel 90
°
so that the “X
1
”
mark is positioned as shown.
d. Release the front wheel.
e. When the wheel stops, put an “X
2
” mark at
the bottom of the wheel.
f. Repeat steps (d) through (f) 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”.
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3. Adjust:
• Front wheel static balance
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a. Install a balancing weight “1” onto the rim
exactly opposite the heavy spot “X”.
TIP
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 posi-
tion, install a heavier weight.
d. Repeat steps (b) and (c) until the front
wheel is balanced.
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4. Check:
• Front wheel static balance