engine YAMAHA GRIZZLY 125 2011 Owners Manual

EBU30000
Read this manual carefully before operating this vehicle. This manual should stay with this ve-
hicle if it is sold.
EC Declaration of Conformityconforming to Directive 2006/42/EC
(
Make, model)
to which this declaration applies, conforms to the essential health
and safety requirements of Directive 2006/42/EC
and to the other relevant Directives of EEC
2004
/108/EC
(
Title and
/or number and date of issue of the other Directives of EEC)
(
If applicable)
(
If applicable)To e
ffect correct
application
of the
essential
health
and safety
requirements
stated in the Directives of EEC, the
following-standards and
/or technical
specifications were consulted:
ANSI
/SVIA 1-2007
(
Title and
/or number and date of issue of standards and
/or specifications)
General Manager
RV Engineering Division
MC Operations Signature
Date of Issue
Shinya Shimada6 January, 2010
YAMAHA MOTOR EUROPE N.V.
Koolhovenlaan 101, 1119 NC Schiphol-Rijk, The Netherlands
We, YAMAHA MOTOR CO., LTD. 2500 Shingai, Iwata, Japan,
Authorized Representativedeclare in sole responsibility, that the product
YFM125A(
YFM125G) (
JY4AE02W0A0013325
)

EBU17420
TABLE OF CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ............................ 1-1
SAFETY INFORMATION .............................. 2-1
DESCRIPTION .............................................. 3-1
Left view ..................................................... 3-1
Right view................................................... 3-1
Controls and instruments ........................... 3-2
INSTRUMENT AND CONTROL
FUNCTIONS .................................................. 4-1
Main switch ............................................... 4-1
Indicator lights ........................................... 4-1
Handlebar switches ................................... 4-2
Throttle lever ............................................. 4-3
Speed limiter ............................................. 4-3
Front brake lever ....................................... 4-4
Rear brake lever ........................................ 4-4
Parking brake ............................................ 4-5
Drive select lever ....................................... 4-6
Fuel tank cap ............................................. 4-6
Fuel ........................................................... 4-6
Fuel cock ................................................... 4-8
Starter (choke) .......................................... 4-9Seat ......................................................... 4-10
Front carrier ............................................. 4-11
Rear carrier .............................................. 4-11
PRE-OPERATION CHECKS ..........................5-1
Fuel ............................................................ 5-3
Engine oil ................................................... 5-3
Transmission oil ......................................... 5-3
Front and rear brakes ................................ 5-3
Throttle lever .............................................. 5-3
Drive chain ................................................. 5-3
Tires ........................................................... 5-3
Chassis fasteners ...................................... 5-5
Instruments, lights and switches ................ 5-6
Battery ....................................................... 5-6
OPERATION...................................................6-1
Starting a cold engine ................................ 6-1
Starting a warm engine .............................. 6-2
Operating the drive select lever and
driving in reverse .....................................6-3
Engine break-in .......................................... 6-4
Parking ....................................................... 6-5
Parking on a slope ..................................... 6-5
Accessories and loading ............................ 6-6

RIDING YOUR ATV ...................................... 7-1
GETTING TO KNOW YOUR ATV.............. 7-2
RIDE WITH CARE AND GOOD
JUDGMENT ............................................. 7-2
BE CAREFUL WHERE YOU RIDE ............ 7-9
TURNING YOUR ATV ............................. 7-12
CLIMBING UPHILL .................................. 7-13
RIDING DOWNHILL................................. 7-16
CROSSING A SLOPE.............................. 7-17
CROSSING THROUGH SHALLOW
WATER ..................................................7-18
RIDING OVER ROUGH TERRAIN .......... 7-20
SLIDING AND SKIDDING ........................ 7-20
WHAT TO DO IF... ................................... 7-21
WHAT TO DO... ....................................... 7-21
PERIODIC MAINTENANCE AND
ADJUSTMENT ............................................... 8-1
Owner’s manual and tool kit ...................... 8-1
Periodic maintenance chart for the
emission control system .......................... 8-3
General maintenance and lubrication
chart ........................................................ 8-5
Checking the spark plug ............................ 8-8
Engine oil .................................................. 8-9
Transmission oil ...................................... 8-12
Cleaning the engine and V-belt case air
filter elements ........................................ 8-15
Cleaning the spark arrester ..................... 8-21V-belt case drain screw ........................... 8-23
Adjusting the carburetor ........................... 8-24
Adjusting the engine idling speed ............ 8-24
Adjusting the throttle cable free play ........ 8-25
Valve clearance ....................................... 8-26
Brakes ...................................................... 8-26
Checking the front and rear brake
shoes .....................................................8-26
Adjusting the front brake lever free
play ........................................................8-27
Adjusting the rear brake lever free
play ........................................................ 8-32
Drive chain slack ...................................... 8-33
Lubricating the drive chain ....................... 8-35
Checking and lubricating the cables ........ 8-36
Checking and lubricating the front and
rear brake levers ....................................8-36
Checking the wheel hub bearings ............ 8-37
Lubricating the upper and lower arm
pivots ....................................................8-38
Lubricating the front knuckle pivots ......... 8-39
Lubricating the steering shaft ................... 8-39
Battery ..................................................... 8-40
Replacing the fuse ................................... 8-43
Replacing a headlight bulb ...................... 8-44
Adjusting a headlight beam ..................... 8-46
Replacing the tail/brake light bulb ............ 8-46
Removing a wheel ................................... 8-47
Installing a wheel ..................................... 8-47

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6
7
8
9
10
11

EBU17431
SAFETY INFORMATION

SAFETY INFORMATION
EBU17463
AN ATV IS NOT A TOY AND CAN BE HAZARD-
OUS TO OPERATE.

An ATV handles differently from other vehicles, in-
cluding motorcycles and cars. A collision or roll-
over can occur quickly, even during routine
maneuvers such as turning and riding on hills or
over obstacles, if you fail to take proper precau-
tions.
SEVERE INJURY OR DEATH can result if you do
not follow these instructions:

Read this manual and all labels carefully and fol-
low the operating procedures described.

Never operate an ATV without proper training or
instruction.

Always follow the age recommendation:
– A child under 16 years old should never oper-
ate an ATV with engine size greater than 90 cc.

Never allow a child under age 16 to operate an
ATV without adult supervision, and never allow
continued use of an ATV by a child if he or shedoes not have the abilities to operate it safely.

Never carry a passenger on an ATV.

Always avoid operating an ATV on any paved
surfaces, including sidewalks, driveways, park-
ing lots and paved streets.

Never operate an ATV on any paved street,
paved road or motorway.

Watch carefully for other vehicles when operat-
ing on unpaved public streets or roads. Make
sure you know your country’s laws and regula-
tions before you ride on unpaved public streets
or roads.

Never operate an ATV without wearing an ap-
proved motorcycle helmet that fits properly. You
should also wear eye protection (goggles or face
shield), gloves, boots, a long-sleeved shirt or a
jacket, and long pants.

Never consume alcohol or drugs before or while
operating this ATV.

Never operate at speeds too fast for your skills
or the riding conditions. Always go at a speed
that is proper for the terrain, visibility, operating

2-3
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4
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8
9
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11

speed when climbing a hill. If you stall or roll
backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.

Always check for obstacles before operating in a
new area.

Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.

Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.

Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. Remember that wet brakes may have
reduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.

Always be sure there are no obstacles or peoplebehind you when you operate in reverse. When
it is safe to proceed in reverse, go slowly.

Always use the size and type of tires specified in
this manual.

Always maintain proper tire pressure as de-
scribed in this manual.

Never modify an ATV through improper installa-
tion or use of accessories.

Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.WARNING

EWB00071
Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon monoxide,
a deadly gas. Breathing carbon monoxide can
cause headaches, dizziness, drowsiness, nau-
sea, confusion, and eventually death.
Carbon Monoxide is a colorless, odorless,
tasteless gas which may be present even if you
do not see or smell any engine exhaust. Deadly
levels of carbon monoxide can collect rapidly
and you can quickly be overcome and unable

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to save yourself. Also, deadly levels of carbon
monoxide can linger for hours or days in en-
closed or poorly ventilated areas. If you experi-
ence any symptoms of carbon monoxide
poisoning, leave the area immediately, get
fresh air, and SEEK MEDICAL TREATMENT.

Do not run engine indoors. Even if you try to
ventilate engine exhaust with fans or open
windows and doors, carbon monoxide can
rapidly reach dangerous levels.

Do not run engine in poorly ventilated or par-
tially enclosed areas such as barns, garages,
or carports.

Do not run engine outdoors where engine
exhaust can be drawn into a building
through openings such as windows and
doors.
WARNING

EWB02591
When transporting the ATV in another vehicle,
be sure it is kept upright and that the fuel cock
is in the “OFF” position. Otherwise, fuel may
leak out of the carburetor or fuel tank.

3-1
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8
9
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11

EBU17680
DESCRIPTION
EBU17690
Left view
EBU17700
Right view
1. Front carrier
2. Starter (choke)
3. Fuel cock
4. Throttle stop screw
5. Tail/brake light
6. Rear carrier
7. Spark arrester
8. Footboard
123
5
6
7
8
4

1. Owner’s tool kit
2. Battery
3. Drive select lever
4. Spark plug
5. Headlight
6. Engine oil filler cap
7. Fuse
23
5
6
7
1
4

4-1
1
2
34
5
6
7
8
9
10
11

EBU17733
INSTRUMENT AND CONTROL FUNCTIONS
EBU17760
Main switch
The positions of the main switch are as follows:
ON
All electrical systems are supplied with power. The
headlights and taillight come on when the light
switch is on, and the engine can be started. The
key cannot be removed.
OFF
All electrical systems are off. The key can be re-
moved.

EBU17793
Indicator lights
EBU17860
Neutral indicator light “”
This indicator light comes on when the transmis-
sion is in the neutral position.
EBU17830
Reverse indicator light “”
This indicator light comes on when the transmis-
sion is in the reverse position.
1. Main switch
OFF ON
1

1. Reverse indicator light “R”
2. Neutral indicator light “N”
1
2

4-2
1
2
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EBU18061
Handlebar switches
EBU18080
Engine stop switch “/”
Set this switch to “ ” before starting the engine.
The engine stop switch controls the ignition and
stops the engine when it is running. Use this switch
to stop the engine in an emergency situation. The
engine will not start or run when this switch is set
to “ ”.
EBU18101
Start switch “”
Push this switch to crank the engine with the start-
er. See the starting instructions on page 6-1 prior
to starting the engine.
EBU18152
Light switch “/ /OFF”
Set this switch to “ ” to turn on the low beams
and the taillight. Set the switch to “ ” to turn on
the high beams and the taillight. Set the switch to
“OFF” to turn off all the lights.NOTICE
ECB00041
Do not use the headlights with the engine
turned off for an extended period of time, oth-
erwise the battery may discharge to the point
that the starter motor will not operate properly.
If this should happen, remove the battery and
recharge it. See page 8-40 for battery charging
information.
EBU18170
Horn switch “”
Press the switch to sound the horn.
1. Horn switch “ ”
2. Light switch “ / /OFF”
3. Engine stop switch “ / ”
4. Start switch “ ”
2
3
41

4-3
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8
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11

EBU18282
Throttle lever
Once the engine is running, pushing the throttle le-
ver will increase the engine speed.
Regulate the speed of the ATV by varying the
throttle position. Because the throttle is spring-
loaded, the ATV will decelerate, and the engine will
return to an idle any time the throttle lever is re-
leased.
Before starting the engine, check the throttle to be
sure it is operating smoothly. Make sure it returns
to the idle position as soon as the lever is released.
EBU18323
Speed limiter
Your ATV is equipped with an adjustable speed
limiter. The speed limiter keeps the throttle from
fully opening, even when the throttle lever is
pushed to the maximum.
1. Loosen the locknut.
2. To increase the maximum engine power avail-
able and the maximum speed of the ATV, turn
the adjusting screw in direction (a). To de-
crease the maximum engine power available
and the maximum speed of the ATV, turn the
adjusting screw in direction (b). Do not turn
the adjusting screw out more than 12 mm
(0.47 in) or the throttle cable could be dam-
aged. Always make sure the throttle lever free
play is adjusted to 1.0–3.0 mm (0.04–0.12 in).
(See page 8-25.)
WARNING! Improper ad-
justment of the speed limiter and throttle
could cause throttle cable damage or im-
proper throttle operation. You could lose
control, resulting in an accident.
[EWB00241]

1. Throttle lever
1