2018 YAMAHA YFZ450R fuel cap

EBU17421
TABLE OF CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS .............................. 1-1
SAFETY INFORMATION ................................ 2-1
DESCRIPTION................................................ 3-1Left view ...................................................... 3-1
Right view.................................................... 3-1
Controls and instruments............................ 3-2
INSTRUMENT AND CONTROL
FUNCTIONS ................................................... 4-1 Main switch ................................................. 4-1
Indicator light and warning lights ................ 4-1
Handlebar switches .................................... 4-3
Throttle lever ............................................... 4-4
Speed limiter ............................................... 4-4
Clutch lever ................................................. 4-5
Brake lever .................................................. 4-5
Brake pedal ................................................. 4-6
Parking brake lever ..................................... 4-6
Shift pedal ................................................... 4-7
Fuel tank cap............................................... 4-8
Fuel ............................................................. 4-8 Seat .......................................................... 4-10
Front shock absorbers ............................. 4-11
Rear shock absorbers .............................. 4-16
Handlebar position ................................... 4-23
PRE-OPERATION CHECKS .......................... 5-1 Fuel ............................................................. 5-4
Engine oil .................................................... 5-4
Coolant ....................................................... 5-4
Front and rear brakes ................................. 5-4
Throttle lever ............................................... 5-5
Drive chain .................................................. 5-5
Tires ............................................................ 5-5
Chassis fasteners ....................................... 5-7
Instruments, lights and switches ................ 5-7
OPERATION .................................................. 6-1 Starting the engine ..................................... 6-1
Shifting........................................................ 6-2
Engine break-in........................................... 6-4
Parking........................................................ 6-4
Parking on a slope ...................................... 6-5
Accessories and loading ............................ 6-5UBW261E0.book Page 1 Friday, May 26, 2017 9:38 AM

1-6
1
E10
**.* kPa
*.** kgf/cm²
*.* psi **.* kPa
*.** kgf/cm²
*.* psi
This pictogram sho
ws trailer Hitch To w
w eight limit. (Combined weight of the trailer
and all cargo in the trailer.)
Ov erloading can cause loss of control.
Loss of control can result in se vere injury or
death.
EN228 fuel identification mark.
Gasoline of ethanol 10% or less can be
used.
Use unleaded gasoline only.
Measure the tire pressure when the tires are
cold.
Adjust the tire pressure.
Improper tire pressu re can cause loss of
control.
Loss of control can result in se vere injury or
death. This pictogram sho
ws the loading limits
and/or maxim um load capacity for this AT V.
Follo w all load limits and other loading
guidelines in this man ual.
Load may inclu de the driver, passenger,
human protectiv e gear, accessories, goods,
luggage, and all other load related items.
Make sure you do not exceed the load limits.
Ov erloading can cau se loss of control.
Loss of control can result in se vere injur

y or
death.
This pictogram sho ws trailer Hitch Tongue
w eight limit. (Weight on the trailer tongue.)
Ov erloading can cause loss of control.
Loss of control can result in se vere injury or
death.
UBW261E0.book Page 6 Friday, May 26, 2017 9:38 AM

2-5
2
4. Once immediate safety hazards are con-
firmed not to exist, you may remove your hel-
met to more closely inspect your vehicle.
Check for external signs of wear, broken
parts, fluid leaks, cracks in the frame, sus-
pension damage, wheel damage, and so on.
Fuel, oil, and coolant usually give off a notice-
able odor.
5. If your vehicle will not restart or if it is unsafe to ride, then turn off all vehicle systems (en-
gine stop switch, main switch, and fuel cock),
and then signal or go for help.
Aftermarket Parts, Accessories, and Modifica-
tions
While you may find aftermarket products similar in
design and quality to genuine Yamaha accesso-
ries, recognize that some aftermarket accessories
or modifications are not suitable because of po-
tential safety hazards to you or others. Installing
aftermarket products or having other modifica-
tions performed to your vehicle that change any of
the vehicle’s design or operation characteristics
can put you and others at greater risk of serious
injury or death. You are responsible for injuries re- lated to changes in the vehicle. Keep the following
guidelines in mind, as well as those provided un-
der “Loading” when mounting accessories.

Never install accessories that would impair the
performance of your ATV. Carefully inspect the
accessory before using it to make sure that it
does not in any way reduce ground clearance,
limit suspension travel, steering travel or control
operation.
 Accessories fitted to the ATV can create insta-
bility due to improper weight distribution.
 Bulky or large accessories may seriously affect
the stability of the ATV.
 Certain accessories can displace the operator
from his or her normal riding position. This im-
proper position limits the freedom of movement
of the operator and may limit control ability,
therefore, such accessories are not recom-
mended.
 Use caution when adding electrical accesso-
ries. If electrical accessories exceed the capac-
ity of the ATV’s electrical system, an electric
failure could result, which could cause a dan-
gerous loss of lights or engine power.
UBW261E0.book Page 5 Friday, May 26, 2017 9:38 AM

3-1
3
EBU17681
DESCRIPTION
EBU17691Left view
EBU17701Right view
1. Front shock absorber
2. Engine oil tank filler cap
3. Rear brake fluid reservoir
4. Battery
5. Shift pedal
6. Coolant reservoir
563
1
4
2
1. Spark arrester
2. Fuse
3. Fuel tank cap
4. Oil filter element
5. Brake pedal
6. Rear brake light switch
7. Rear shock absorber
456
1
2
7
3
UBW261E0.book Page 1 Friday, May 26, 2017 9:38 AM

4-8
4
EBU18722Fuel tank capRemove the fuel tank cap by turning it counter-
clockwise.EBU37251FuelMake sure there is sufficient gasoline in the tank
before starting off. This model has been designed
to use premium unleaded gasoline of RON 97. If
knocking or pinging occurs, use a gasoline of a
higher octane (research octane number) or a dif-
ferent brand. Use of unleaded fuel will extend
spark plug life and reduce maintenance costs.
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. When refueling, be sure to select the recom- mended fuel as specified. Do not overfill the
fuel tank. Since fuel expands when heated,
stop filling when the fuel reaches the bottom
of the filler tube. Otherwise heat from the en-
gine or sun can cause the fuel to expand and
spill out of the fuel tank.
1. Fuel tank cap
1
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4-9
4
TIPWhen refueling, check that the gasoline pump
nozzle has the same identification mark. 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:Premium unleaded gasoline, octane 97 or
higher
Fuel tank capacity: 10.0 L (2.64 US gal, 2.20 Imp.gal)
Fuel reserve amount: 3.4 L (0.90 US gal, 0.75 Imp.gal)
2
1
1. EN228 fuel identification mark
E10
1
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4-10
43. After refueling, return the nozzle and then
close the fuel tank cap fully by turning it
clockwise. Make sure the fuel tank cap is se-
curely closed.
4. 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]
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.
EBU26733SeatTo remove the seat
Insert your hand between the rear of the seat and
the rear fender, pull the seat lock lever and pull up
the seat at the rear.1. Seat lock lever
1
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8-10
8
EBU30131Removing and installing the cowling
and panelsThe cowling and panels shown need to be re-
moved to perform some of the maintenance jobs
described in this chapter. Refer to this section
each time a cowling or panel needs to be removed
and installed.
EBU29596Panel A
To remove the panel1. Remove the seat. (See page 4-10.)
2. Remove the fuel tank cap by turning it coun-terclockwise. (See page 4-8.) NOTICE: Make
sure that no foreign material enters the
fuel tank.
[ECB01052]
3. Loosen the quick fasteners.
1. Panel A
2. Panel B
3. Cowling
1
2
3
1. Panel C
1
UBW261E0.book Page 10 Friday, May 26, 2017 9:38 AM