2011 YAMAHA GRIZZLY 125 service

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EBU28783
PERIODIC MAINTENANCE AND ADJUSTMENT
EBU21672
Periodic inspection, adjustment, and lubrication
will keep your vehicle in the safest and most effi-
cient condition possible. Safety is an obligation of
the vehicle owner/operator. The most important
points of vehicle inspection, adjustment, and lubri-
cation are explained on the following pages.
WARNING

EWB01841
Failure to properly maintain the vehicle or per-
forming maintenance activities incorrectly may
increase your risk of injury or death during ser-
vice or while using the vehicle. If you are not fa-
miliar with vehicle service, have a Yamaha
dealer perform the service.
WARNING

EWB02561
Turn off the engine when performing mainte-
nance unless otherwise specified.

A running engine has moving parts that can
catch on body parts or clothing and electri-
cal parts that can cause shocks or fires.

Running the engine while servicing can lead
to eye injury, burns, fire, or carbon monoxide
poisoning - possibly leading to death. See
page 2-1 for more information about carbon
monoxide.WARNING

EWB02690
Brake discs, calipers, drums, and linings can
become very hot during use. To avoid possible
burns, let brake components cool before
touching them.
The intervals given in the periodic maintenance
and lubrication chart should be considered as a
general guide under normal riding conditions.
However, DEPENDING ON THE WEATHER,
TERRAIN, GEOGRAPHICAL LOCATION, AND
INDIVIDUAL USE, THE MAINTENANCE INTER-
VALS MAY NEED TO BE SHORTENED.
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Owner’s manual and tool kit
Be sure to put this owner’s manual in the plastic
bag and to always carry it as well as the owner’s

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tool kit and the low-pressure tire gauge in their re-
spective compartments under the seat.
The service information included in this manual
and the tools provided in the owner’s tool kit are in-
tended to assist you in the performance of preven-
tive maintenance and minor repairs. However,
additional tools such as a torque wrench may be
necessary to perform certain maintenance work
correctly.
TIP
If you do not have the tools or experience required
for a particular job, have a Yamaha dealer perform
it for you.
1. Owner’s manual
2. Low-pressure tire gauge
3. Owner’s tool kit
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2 3

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TIP

Some maintenance items need more frequent service if you are riding in unusually wet, dusty, sandy or
muddy areas, or at full-throttle.
16 Engine oil strainer

Clean.
√√√
17 Transmission oil


Change.

Check ATV for oil leakage, and correct if necessary.
√√
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Moving parts and
cables


Lubricate.
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*
Throttle lever hous-
ing and cable


Check operation and correct if necessary.

Check throttle cable free play and adjust if neces-
sary.

Lubricate throttle lever housing and cable.
√√√√√
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*
Front and rear brake
switches


Check operation and correct if necessary.
√√√√√
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Lights and switches


Check operation and correct if necessary.

Adjust headlight beams.
√√√√√
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Battery


Check electrolyte level and specific gravity, and
correct if necessary.

Make sure that the breather hose is properly
routed.
√√√√√
NO. ITEMCHECK OR MAINTENANCE
JOBINITIAL EVERY
Whichev-
er comes
firstmonth 1 3 6 6 12
km
(mi)320
(200)1300
(800)2500
(1600)2500
(1600)5000
(3200)
hours 20 80 160 160 320

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4. Tighten the locknut.
5. Slide the rubber cover to its original position.
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Valve clearance
The valve clearance changes with use, resulting in
improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance and lu-
brication chart.
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Brakes
Replacement of brake components requires pro-
fessional knowledge. Brake service should be per-
formed by a Yamaha dealer.
WARNING

EWB02571
Operating with improperly serviced or adjust-
ed brakes could lead to a loss in braking ability
and an accident.
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Checking the front and rear brake
shoes
The front and rear brake shoes must be checked
for wear at the intervals specified in the periodic
maintenance and lubrication chart. Each brake is
provided with a wear indicator, which allows you to
check the brake shoe wear without having to dis-
assemble the brake. To check the brake shoe
wear, check the position of the wear indicator while
applying the brake. If a brake shoe has worn to the
point that the wear indicator reaches the wear limit
line or mark, have a Yamaha dealer replace the
brake shoes as a set.
1. Rubber cover
2. Throttle cable free play adjusting bolt
3. Locknut
4. Throttle cable free play
4 3
2
1
(a) (b)

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NOTICE

ECB00550
If measurement “A” of the drive chain adjust-
ing bolt is less than 27 mm (1.06 in), have a
Yamaha dealer replace the drive chain.
6. Tighten the hub stopper bolt, and then its lock-
nut.
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Lubricating the drive chain
The drive chain must be cleaned and lubricated at
the intervals specified in the periodic maintenance
and lubrication chart, otherwise it will quickly wear
out, especially when riding in dusty or wet areas.
Service the drive chain as follows.NOTICE
ECB00561
The drive chain must be lubricated after wash-
ing the ATV or riding in the rain or wet areas.
1. Clean the drive chain with kerosene and a
small soft brush.
NOTICE:
To prevent dam-
aging the O-rings, do not clean the drive
chain with steam cleaners, high-pressure
washers or inappropriate solvents.

[ECB00571]
Tightening torques:
Chain adjusting bolt locknut:
16 Nm (1.6 m·kgf, 12 ft·lbf)
Axle holding bolt (upper):
85 Nm (8.5 m·kgf, 61 ft·lbf)
Axle holding bolt (lower):
60 Nm (6.0 m·kgf, 43 ft·lbf)
1. Measurement A
1

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TIP

Tapered nuts are used for both the front and rear
wheels. Install the nuts with their tapered side to-
wards the wheel.
4. Lower the ATV to the ground.
5. Tighten the wheel nuts to the specified
torques.
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Troubleshooting
Although Yamaha ATVs receive a thorough in-
spection before shipment from the factory, trouble
may occur during operation. Any problem in the fu-
el, compression, or ignition systems, for example,
can cause poor starting and loss of power.
The following troubleshooting chart represents a
quick and easy procedure for checking these vital
systems yourself. However, should your ATV re-
quire any repair, take it to a Yamaha dealer, whose
skilled technicians have the necessary tools, expe-
rience, and know-how to service the ATV properly.
Use only genuine Yamaha replacement parts. Im-
itation parts may look like Yamaha parts, but they
are often inferior, have a shorter service life and
can lead to expensive repair bills.
1. Tapered nut
1

Tightening torques:
Front wheel nut:
55 Nm (5.5 m·kgf, 40 ft·lbf)
Rear wheel nut:
55 Nm (5.5 m·kgf, 40 ft·lbf)

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Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Engine oil quantity:
Periodic oil change:
1.25 L (1.32 US qt, 1.10 Imp.qt)
Transmission oil:
Quantity:
0.6 L (0.63 US qt, 0.53 Imp.qt)
Air filter:
Air filter element:
Wet element
Fuel:
Recommended fuel:
Regular unleaded gasoline onlyFuel tank capacity:
7.0 L (1.85 US gal, 1.54 Imp.gal)
Fuel reserve amount:
1.3 L (0.34 US gal, 0.29 Imp.gal)
Carburetor:
Type
×
quantity:
VM18SH x 1
Spark plug (s):
Manufacturer/model:
NGK/CR7HSA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:
Dry, centrifugal automatic
Transmission:
Primary reduction system:
Helical gear/spur gear
Primary reduction ratio:
43/14
×
40/17 (7.226)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
32/12 (2.666)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic type
Reverse gear:
49/14
×
49/15
×
40/17 (26.902)
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1020 304050 ˚C
SAE 15W-40
SAE 20W-40SAE 20W-50
SAE 10W-40
SAE 5W-30
SAE 10W-30