2012 YAMAHA GRIZZLY 125 tires

7-12
7 Select a large, flat, unpaved area to become famil-
iar with your ATV. Make sure that this area is free
of obstacles and other riders. You should practice
control of the throttle, brakes, shifting procedures,
and turning techniques in this area before trying
more difficult terrain.
Set the parking brake and follow the instruction on
page 6-1 to start the engine. Once it has warmed
up you are ready to begin riding your ATV. With the
engine idling, return the starter knob to the closed
position and shift the drive select lever into the for-
ward position, then release the parking brake. Ap-
ply the throttle slowly and smoothly.
The centrifugal clutch will engage and you will start
to accelerate. If the throttle is applied too abruptly,
the front wheels may lift off the ground, resulting ina loss of directional control. Avoid higher speeds
until you are thoroughly familiar with the operation
of your ATV.
When slowing down or stopping, release the throt-
tle and apply the brakes smoothly and evenly. Im-
proper use of the brakes can cause the tires to lose
traction, reducing control and increasing the possi-
bility of an accident.
TURNING YOUR ATV
WARNING
EWB01771Always follow proper procedures for turning
as described in this Owner’s Manual. Practice
turning at low speeds before attempting to turn
at faster speeds. Do not turn at speeds too fast
for your skills or the conditions. ATV could go
out of control, causing a collision or overturn.To achieve maximum traction on unpaved surfac-
es, the two rear wheels turn together at the same
speed. Therefore, unless the wheel on the inside
of the turn is allowed to slip or lose some traction,
the ATV will resist turning. A special turning tech-
nique must be used to allow the ATV to make turns
quickly and easily. It is essential that this skill be
learned first at low speed.
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7-18
7

Shift your weight to the uphill side of the
ATV.
Never attempt to turn the ATV around on any
hill until you have mastered the turning tech-
nique as described in the Owner’s Manual on
level ground. Be very careful when turning
on any hill.Traversing a sloping surface on your ATV requires
you to properly position your weight to maintain
proper balance. Be sure that you have learned the
basic riding skills on flat ground before attempting
to cross a sloping surface. Avoid slopes with slip-
pery surfaces or rough terrain that may upset your
balance.
As you travel across a slope, lean your body in the
uphill direction. It may be necessary to correct the
steering when riding on loose surfaces by pointing
the front wheels slightly uphill. When riding on
slopes, be sure not to make sharp turns either up
or down hill.
If your ATV does begin to tip over, gradually steer
in the downhill direction if there are no obstacles in
your path. As you regain proper balance, gradually
steer again in the direction you wish to travel.CROSSING THROUGH SHALLOW WATER
WARNING
EWB01641Operating this vehicle through deep or fast-
flowing water can lead to loss of control or an
overturn. To reduce your risk of drowning or
other injuries, use care when crossing through
water. Never operate this ATV water deeper
than the depth specified in your Owner’s Man-
ual, as tires may float, increasing the risk of an
overturn.
U1PY60E0.book Page 18 Friday, March 11, 2011 9:30 AM

8-6
8
4*WheelsCheck runout and for damage, and replace if nec-
essary.√ √√√
5*TiresCheck tread depth and for damage, and replace if
necessary.
Check air pressure and balance, and correct if
necessary.√ √√√
6*Wheel hub bearingsCheck for looseness or damage, and replace if
necessary.√ √√√
7*Lower arm pivotsLubricate with lithium-soap-based grease.√√√
8 Drive chainCheck chain slack and adjust if necessary.
Check rear wheel alignment and correct if neces-
sary.
Clean and lubricate.√√√√√
9*V- b e l tCheck for wear, cracks or other damage, and re-
place if necessary.√√
10*Chassis fastenersMake sure that all nuts, bolts, and screws are
properly tightened.√√√√√
11*Shock absorber as-
sembliesCheck operation and correct if necessary.
Check for oil leakage and replace if necessary.√√√
12*Front knuckle piv-
otsLubricate with lithium-soap-based grease.√√√
13*Steering shaftLubricate with lithium-soap-based grease.√√√ NO. ITEMCHECK OR MAINTENANCE
JOBINITIAL EVERY
Whichev-
er comes
firstmonth136612
km
(mi)320
(200)1300
(800)2500
(1600)2500
(1600)5000
(3200)
hours 20 80 160 160 320
U1PY60E0.book Page 6 Friday, March 11, 2011 9:30 AM

8-16
8 5. Install the drain bolt and its new gasket, and
then tighten the bolt to the specified torque.
6. Refill with the specified amount of the recom-
mended transmission oil. NOTICE: Make
sure that no foreign material enters the
transmission case.
[ECB00791]
7. Check the oil filler bolt gasket for damage, and
replace it if necessary.
8. Install the oil filler bolt and its gasket, and then
tighten the bolt to the specified torque.NOTICEECB01061Make sure that no oil gets on the tires or
wheels.9. Start the engine, and then let it idle for several
minutes while checking the transmission for
oil leakage. If oil is leaking, immediately turn
off the engine and check for the cause.
10. Turn the engine off, and then check the oil lev-
el and correct it if necessary.
1. Transmission oil drain bolt
2. GasketTightening torque:
Transmission oil drain bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
1
12
Recommended transmission oil:
See page 10-1.
Oil quantity:
0.6 L (0.63 US qt, 0.53 Imp.qt)
Tightening torque:
Transmission oil filler bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
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8-34
8 5. Use the adjusting bolt to obtain a precise ad-
justment if necessary, and then tighten the
locknut. If the correct free play cannot be ob-
tained, have a Yamaha dealer adjust it.
EBU24874Drive chain slack The drive chain slack should be checked before
each ride and adjusted if necessary.
To check the drive chain slack
1. Place the ATV on a level surface.
TIPWhen checking and adjusting the drive chain
slack, there should be no weight on the ATV and
all tires must be touching the ground.2. Move the ATV back and forth to locate the
tightest portion of the drive chain, and then
measure the drive chain slack as shown.
3. If the drive chain slack is incorrect, adjust it as
follows.
1. Brake lever free play adjusting nut
1
(a)
(b)
Drive chain slack:
30.0 mm (1.18 in)1. Drive chain slack
1
U1PY60E0.book Page 34 Friday, March 11, 2011 9:30 AM

9-3
9ly, turn the wheels a little every month in order
to prevent the tires from becoming degraded
in one spot.
8. Cover the muffler outlet with a plastic bag to
prevent moisture from entering it.
9. Remove the battery and fully charge it. Store
it in a cool, dry place and charge it once a
month. Do not store the battery in an exces-
sively cold or warm place [less than 0 °C (30
°F) or more than 30 °C (90 °F)]. For more in-
formation on storing the battery, see page
8-41.
TIPMake any necessary repairs before storing the
ATV.U1PY60E0.book Page 3 Friday, March 11, 2011 9:30 AM

10-3
10
Reverse gear:
49/14 × 49/15 × 40/17 (26.902)Chassis:Frame type:
Steel tube frame
Caster angle:
6.0 °
Trail:
15.0 mm (0.59 in)Front tire:Type:
Tubeless
Size:
AT20 x 7-8
Manufacturer/model:
DUNLOP/KT536ARear tire:Type:
Tubeless
Size:
AT22 x 10-8
Manufacturer/model:
DUNLOP/KT537ALoading:Maximum loading limit:
105.0 kg (231 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:
Front:
20.0 kPa (0.200 kgf/cm², 2.9 psi)Rear:
25.0 kPa (0.250 kgf/cm², 3.6 psi)
Minimum:
Front:
17.0 kPa (0.170 kgf/cm², 2.5 psi)
Rear:
22.0 kPa (0.220 kgf/cm², 3.2 psi)
Front wheel:Wheel type:
Panel wheel
Rim size:
8 x 5.5ATRear wheel:Wheel type:
Panel wheel
Rim size:
8 x 8.0ATFront brake:Type:
Drum brake
Operation:
Right hand operationRear brake:Type:
Drum brake
Operation:
Left hand operationFront suspension:Type:
Swing axle
U1PY60E0.book Page 3 Friday, March 11, 2011 9:30 AM

NNeutral indicator light ..................................................... 4-2OOwner’s manual and tool kit ........................................... 8-2PParking ........................................................................... 6-5
Parking brake ................................................................. 4-5
Parking on a slope ......................................................... 6-5
Part locations ................................................................. 3-1RReverse indicator light .................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-10
Spark arrester, cleaning ............................................... 8-23
Spark plug, checking ...................................................... 8-9
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-4
Starter (choke) ............................................................. 4-10
Start switch ..................................................................... 4-3
Steering shaft, lubricating ............................................. 8-40
Storage ........................................................................... 9-2
Suspension, lubricating the lower arm pivots ............... 8-39TTail/brake light bulb, replacing ..................................... 8-47
Throttle lever ........................................................... 4-3, 5-3
Throttle lever free play, adjusting ................................. 8-26
Tires ............................................................................... 5-3
Transmission oil .................................................... 5-3, 8-14
Troubleshooting ........................................................... 8-49
Troubleshooting chart .................................................. 8-50
VValve clearance ............................................................ 8-27
V-belt case drain screw ................................................ 8-24
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-38
Wheel, installing ........................................................... 8-48
Wheel, removing .......................................................... 8-47
U1PY60E0.book Page 2 Friday, March 11, 2011 9:30 AM