engine YAMAHA KODIAK 450 2021 User Guide

5-7
5
For differential gear lock models
If a problem is detected in any of those circuits,
the engine trouble warning light will come on or
flash, and the display will indicate an error code.
If the display indicates an error code, note the
code number and have a Yamaha dealer check
the vehicle.
NOTICEECB01181To prevent engine damage, be sure to consult
a Yamaha dealer as soon as possible if this oc-
curs.
EBU18068Handlebar switchesFor non-differential gear lock models1. Light switch “ / /OFF”
2. Engine stop switch “ / ”
3. Start switch “ ”
4. Horn switch “ ”
5. Winch switch “OUT/IN”
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521
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5For differential gear lock models For non-differential gear lock models
1. Light switch “ / /OFF”
2. Start switch “ ”
3. Engine stop switch “ / ”
4. Override switch “OVERRIDE” (equipped models)
5. Horn switch “ ”
6. Winch switch “OUT/IN”
432
5
1
6
1. On-Command drive switch

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5
For differential gear lock models
EBU18081Engine 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 situa-
tion. The engine will not start or run when this
switch is set to “ ”.
EBU18102Start switch “ ”
Push this switch to crank the engine with the start-
er. See the starting instructions on page 7-1 prior
to starting the engine.EBU34123Light switch “ / /OFF”
Set this switch to “ ” to turn on the left and right
headlights (low beams) and the taillight. Set the
switch to “ ” to turn on the left and right head-
lights (high beams), the handlebar-mounted light
(equipped models), and the taillight. Set the switch
to “OFF” to turn off all the lights.NOTICEECB00046Do not use the headlights with the engine
turned off for an extended period of time. The
battery may discharge to the point that the
starter will not have enough power to crank the
engine. If this should happen, remove the bat-
tery and recharge it. (See page 9-53.) EBU18171Horn switch “ ”
Press the switch to sound the horn.
1. On-Command drive switch “2WD/4WD”
2. On-Command drive switch “4WD/LOCK”
3. Drive switch lock lever
2WD
4WD
LOCK4WD
3
3
2
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EBU39181Winch switch “OUT/IN”
This switch is used when operating the winch
(page 5-22). Read this manual and the Winch
Owner’s Manual completely before operating the
winch switch.EBU18192Override switch “OVERRIDE” (differential gear
lock models)
Top speed is normally limited when operating in
differential gear lock. If conditions require more
engine power when riding forward, push and hold
this switch to override the differential gear lock
speed limiting function. (See page 5-11.) Releas-
ing the switch restores the speed limiting function.
While the override switch is pushed, the segments
of the speedometer digits will appear as shown in
the figure.
TIPIf the digits of the speedometer appear as shown
when the switch is NOT being pushed, this could
indicate a malfunction in the electrical system. In
this case, take the ATV to a Yamaha dealer at the
first opportunity.
WARNING
EWB00151Always ride at a slow speed when the ATV is in
four-wheel-drive differential gear lock, and al-
low extra time and distance for maneuvers.
All wheels turn at the same speed when the dif-
ferential is locked, so it takes more effort to
turn the ATV. The effort needed to turn increas-
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5The ATV handles differently in four-wheel drive
than in differential gear lock in some circum-
stances. Changing from four-wheel drive to
differential gear lock or vice versa while mov-
ing may cause the ATV to handle differently un-
expectedly. This could distract the operator
and increase the risk of losing control and
causing an accident.
To access the “4WD/LOCK” switch, set the
“2WD/4WD” switch to “4WD”, and then move the
drive switch lock lever to the right.
TIP
When the switch is set to “LOCK”, the differen-
tial gear lock indicator light will flash until the dif-
ferential gear is completely locked or unlocked.
 When the indicator light is flashing, turning the
handlebar back and forth will help the differen-
tial gear lock to engage or disengage.
 Riding before the differential gear is properly en-
gaged or disengaged (e.g., when the indicator
light is 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
5-10.)
WARNING
EWB00141Always ride at a slow speed when the ATV is in
differential gear lock, and allow extra time and
distance for maneuvers.
1. On-Command drive switch “4WD/LOCK”
2. Drive switch lock lever
LOCK4WD
1
2
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5
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.
EBU18286Throttle leverPush the throttle lever to increase engine speed.
Spring tension returns the lever to the rest position
when released. Always check that the throttle le-
ver returns normally before starting the engine.
EBU18325Speed limiterThe speed limiter keeps the throttle from fully
opening, even when the throttle lever is pushed to
the maximum.
Adjusting the speed limiter1. 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). To
decrease the maximum engine power avail-
able and the maximum speed of the ATV, turn
1. Throttle lever
1. Locknut
2. Adjusting screw
3. No more than 12 mm (0.47 in)
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5
EBU37980Fuel tank capRemove the fuel tank cap by turning it counter-
clockwise.
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 besure 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
fuel expands when it heats up, heat from the
engine or the sun can cause fuel to spill out of
the fuel tank.1. Fuel tank cap
1
1. Fuel tank filler tube
2. Maximum fuel level
1
2
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5About the recommended fuel
This model’s engine has been designed to use
regular unleaded gasoline. The research octane
number should be 95 or higher. If knocking or
pinging occurs, try a gasoline of a different brand
or higher octane.
TIPGasoline containing ethanol can be used if the
ethanol content does not exceed 10% (E10). Gas-
oline containing methanol is not recommended
because it can cause damage to the fuel system
or vehicle performance problems. 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.
EBU34141SeatTo remove the seat
Pull up the seat at the rear, and then pull the seat
rearward.1. Seat
1
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5
a safe distance away. Use hook strap to keep
hands away from fairlead when winding the
winch rope.
NOTICEECBM0051Prolonged winching can overheat the winch
motor and can drain the vehicle’s battery, even
when the engine is idling. Allow the winch mo-
tor to cool and the battery to recharge between
uses. EBU28972Trailer hitch (equipped models)This ATV is equipped with a 5 cm (2 in) trailer hitch
receiver.
Trailer towing equipment can be obtained at a
Yamaha dealer. (See page 7-6 for precaution in- formation.)
1. Trailer hitch receiver
1
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EBU19187Auxiliary DC jackNOTICEECB03760Do not use any single electrical accessory or
combination of accessories that require more
than the stated capacity at any one time. This
may overload the circuit and cause the fuse to
blow.
TIPWhen using a winch or other electrical accesso-
ries, the power taken from the DC jack must be re-
duced accordingly. A 12-V accessory, such as a work light or radio
with the proper adapter, can be used when the
main switch is turned on. However, to prevent bat-
tery drain, use when the engine is running and the
headlights are turned off.1. Start the engine.
2. Turn the headlights off.
3. Make sure the accessory is powered off.
4. Open the auxiliary DC jack cap.
5. Insert the accessory power plug into the jack.
6. Turn the accessory on.TIP Turn off the accessory before plugging into/un-
plugging from the jack.
 When the auxiliary DC jack is not being used,
cover it with the cap.
1. Auxiliary DC jack cap
2. Auxiliary DC jackAuxiliary DC jack system capacity:
8.0 A (96 W)
1
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