YAMAHA GRIZZLY 550 2015 Service Manual

4-11
4
expectedly. This could distract the operator
and increase the risk of losing control and
causing an accident.

WARNING
EWB00141Always ride at a slow speed when the ATV is in
differential gear lock, and allow extra time and
distance for maneuvers.
All wheels turn at the same speed when the dif-
ferential gear is locked, so it takes more effort
to turn the ATV. The effort needed to turn in-
creases with the riding speed. You may lose
control and have an accident if you cannot
make a sharp enough turn for the speed you
are traveling. This ATV is equipped with a switch allowing you to
lock the differential gear when in four-wheel drive.
Select the appropriate switch position according
to the terrain and the conditions.

“4WD” (four-wheel drive): Power is supplied to
the rear and front wheels. 
“LOCK” (four-wheel drive with the differential
gear locked): Power is supplied to the rear and
front wheels and the differential gear is locked.
Unlike in four-wheel drive, all wheels turn at the
same speed.
To lock the differential gear in four-wheel drive,
make sure the On-Command four-wheel-drive
switch is pushed in to the “4WD” position.
1. On-Command four-wheel-drive switch “2WD”/“4WD”
2. On-Command differential gear lock switch “4WD”/“LOCK”
2WD
4WD
1
2
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4-12
4Stop the ATV, move the differential gear lock lever
to position (a), and then push the differential gear
lock switch in to the “LOCK” position. When the
differential gear is locked, the differential gear lock
indicator light “DIFF. LOCK” will come on along
with the indicator “ ” in the multi-function dis-
play. To unlock the differential gear, stop the ATV and
push the switch to the “4WD” position.
TIP
When the switch is set to “LOCK” or “4WD”, the
differential gear lock indicator and indicator light
will flash until the differential gear is completely
locked or unlocked.
 When the indicator and indicator light are flash-
ing, turning the handlebar back and forth will
help the differential gear lock to engage or dis-
engage.
1. Differential gear lock lever
2. On-Command four-wheel-drive switch “2WD”/“4WD”
2WD
4WD
2
1
(a)
1. On-Command differential gear lock switch
“4WD”/“LOCK”
LOCK4WD
1
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4

Riding before the differential gear is properly en-
gaged or disengaged (e.g., when the indicator
and indicator light are flashing) will cause the
vehicle speed to be limited until the differential
gear is completely engaged or disengaged.
 When the ATV is in four-wheel-drive differential
gear lock, the maximum traveling speed is limit-
ed to 35 km/h (22 mi/h). However, if conditions
require full engine power to be available, push
and hold the override switch to disable the dif-
ferential gear lock speed limiter. (See page 4-8
for a detailed explanation of this switch.)
EBU18283Throttle leverOnce 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.
EBU18324Speed limiterYour 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 available and the maximum speed of the ATV,
turn the adjusting screw in direction (a). To1. Throttle lever
2WD
4WD
1
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4-14
4decrease the maximum engine power avail-
able 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
damaged. Always make sure the throttle lever
free play is adjusted to 3.0–5.0 mm (0.12–
0.20 in). (See page 8-45.)
WARNING! Im-
proper adjustment of the speed limiter and
throttle could cause throttle cable damage
or improper throttle operation. You could
lose control, resulting in an accident.
[EWB00242]
3. Tighten the locknut.EBU18392Front brake leverThe front brake lever is located on the right han-
dlebar. To apply the front brake, pull the brake le-
ver toward the handlebar grip.EBU18443Brake pedal and rear brake leverThe brake pedal is located on the right side of the
ATV and the rear brake lever is located on the left
handlebar. To apply the rear brake, push down on
the brake pedal or pull the brake lever toward the
handlebar grip.
1. Locknut
2. Adjusting screw
3. No more than 12 mm (0.47 in)
2
1
3
(b)
(a)
1. Front brake lever
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EBU18612Drive select leverThe drive select lever is used to shift your ATV into
the low-range, high-range, neutral, reverse and
park positions. See the “Operating the drive select
lever and driving in reverse” section on page 6-2
for the drive select lever operation.EBU27351Fuel tank capTo remove the fuel tank cap
Open the fuel tank cap cover, and then remove the
fuel tank cap by turning it counterclockwise.
1. Brake pedal
1. Rear brake lever
1. Drive select lever
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4-16
4To install the fuel tank cap
Install the fuel tank cap by turning it clockwise until
a click is heard, and then close the fuel tank cap
cover.
EBU18757FuelMake sure there is sufficient gasoline in the tank.
WARNING
EWB02522Gasoline and gasoline vapors are extremely
flammable. To avoid fires and explosions and
to reduce the risk of injury when refueling, fol-
low these instructions. 1. Before refueling, turn off the engine and be
sure that no one is sitting on the vehicle. Nev-
er refuel while smoking, or while in the vicinity
of sparks, open flames, or other sources of
ignition such as the pilot lights of water heat-
ers and clothes dryers.
2. Do not overfill the fuel tank. When refueling, be sure to insert the pump nozzle into the fuel
tank filler hole. Stop filling when the fuel
reaches the bottom of the filler tube. Because
1. Fuel tank cap cover
1. Fuel tank capU2LB61E0.book Page 16 Friday, February 21, 2014 3:03 PM

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fuel expands when it heats up, heat from the
engine or the sun can cause fuel to spill out of
the fuel tank.
3. Wipe up any spilled fuel immediately.
NOTICE: Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since fuel may
deteriorate painted surfaces or plastic
parts.
[ECB00982]
4. Turn the fuel tank cap fully clockwise to make sure it is securely closed.
WARNING
EWB02532Gasoline is poisonous and can cause injury or
death. Handle gasoline with care. Never siphon
gasoline by mouth. If you should swallow some
gasoline or inhale a lot of gasoline vapor, or get
some gasoline in your eyes, see your doctor
immediately. If gasoline spills on your skin,
wash with soap and water. If gasoline spills on
your clothing, change your clothes. NOTICEECB00071Use only unleaded gasoline. The use of leaded
gasoline will cause severe damage to internal
engine parts, such as the valves and piston
rings, as well as to the exhaust system.
1. Maximum fuel level
2. Fuel tank filler tubeRecommended fuel:Regular unleaded gasoline only
For Europe: Regular unleaded gasoline only
with a research octane number of 95 or
higher
Fuel tank capacity: 20.0 L (5.28 US gal, 4.40 Imp.gal)
Fuel reserve amount: 4.5 L (1.19 US gal, 0.99 Imp.gal)
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4-18
4Your Yamaha engine has been designed to use
regular unleaded gasoline with a research octane
number of 91 or higher (95 or higher for Europe). If
knocking (or pinging) occurs, use a gasoline of a
different brand. Use of unleaded fuel will extend
spark plug life and reduce maintenance costs.
EBU18882SeatTo remove the seat
Pull the seat lock lever upward and pull up the seat
at the rear. To install the seat
Insert the projections on the front of the seat into
the seat holders and push down on the seat at the
rear. Make sure that the seat is securely fitted.
EBU27363Storage compartmentsThis ATV is equipped with two storage compart-
ments.
1. Seat
2. Seat lock lever
1. Projection
2. Seat holder
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NOTICEECB00831Do not store metal or sharply edged objects,
like tools, in the storage compartments. If they
must be stored, wrap them in appropriate
cushion material to prevent damaging the stor-
age compartments. The front storage compartment is located at the
front right side of the ATV. To access the storage
compartment, remove the storage compartment
cover by turning it counterclockwise.The rear storage compartment is located under
the seat. (See page 4-18.) To access the storage
compartment, remove the storage compartment
cover.1. Front storage compartment cover
1. Front storage compartment
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4When storing any documents in the storage com-
partments, be sure to wrap them in a plastic bag
so that they will not get wet. When washing the
ATV, be careful not to let any water enter the stor-
age compartments.

Do not exceed the load limit of 0.5 kg (1 lb) for
the front storage compartment or 2.0 kg (4 lb)
for the rear storage compartment.
 Do not exceed the maximum load of 220.0 kg
(485 lb) for the ATV.
TIPA drain plug is fitted at the bottom of each storage
compartment. If any water collects in a storage
compartment, remove the drain plug, drain the
water, and then install the drain plug.
1. Rear storage compartment cover
1. Rear storage compartmentU2LB61E0.book Page 20 Friday, February 21, 2014 3:03 PM