2021 YAMAHA YFZ450R Owners Manual

8-2
8
EBU21619GETTING TO KNOW YOUR ATV
This ATV is intended for recreational use by expe-
rienced operators only. This section, Riding your
ATV, provides general ATV riding instructions for
recreational riding. The skills and techniques de-
scribed in this section, however, are appropriate
for all types of riding. Riding your ATV requires
special skills acquired through practice over a pe-
riod of time. Take the time to learn the basic tech-
niques well before attempting more difficult
maneuvers.
Riding your new ATV can be a very enjoyable ac-
tivity, providing you with hours of pleasure. But it
is essential to familiarize yourself with the opera-
tion of the ATV to achieve the skill necessary to
enjoy riding safely. Before you begin to ride, be
sure you have read this Owner’s Manual com-
pletely and understand the operation of the con-
trols. Pay particular attention to the safety
information on pages 3-1–3-6. Also read all warn-
ing and notice labels on your ATV.RIDE WITH CARE AND GOOD JUDGMENT
Get training if you are inexperienced.
WARNING
EWB01382
Do not operate this ATV or allow anyone else
to operate it without proper instruction. The
risk of an accident is greatly increased if the
operator does not know how to operate the
ATV properly in different situations and on
different types of terrain.
 Do not operate this ATV at speeds too fast
for your skills or the conditions, as this in-
creases your chances of losing control of the
ATV and an accident. Always go at a speed
that is proper for the terrain, visibility and op-
erating conditions, and your experience. Beginning and inexperienced operators should
regularly practice the skills and the operating
techniques described in this Owner’s Manual.
Riding your ATV requires skills acquired
through practice over a period of time.
Do not attempt to operate at maximum perfor-
mance until you are totally familiar with the ATV’s
handling and performance characteristics. Take
UBKD60E0.book Page 2 Wednesday, November 18, 2020 8:39 AM

8-3
8the time to learn the basic techniques well before
attempting more difficult maneuvers. Become fa-
miliar with this ATV at slow speeds first, even if you
are an experienced operator.
Not recommended for children under 16 years
of age.
WARNING
EWB01391A child under 16 should never operate an ATV
with engine size greater than 90 cc. Use by
children of ATVs that are not recommended for
their age can lead to severe injury or death of
the child.
This ATV is designed to carry the operator only
– passengers prohibited.
The long seat is to allow the operator to shift posi-
tion as needed during operation. It is not for carry-
ing passengers.
WARNING! Never carry a
passenger. Carrying a passenger on this ATV
greatly reduces your ability to balance and
control this ATV. You could have an accident,
resulting in severe injury or death to you and/or
your passenger.
[EWB01402]
UBKD60E0.book Page 3 Wednesday, November 18, 2020 8:39 AM

8-4
8
Apparel
Always wear the following to reduce risk of injury
in an accident:

Approved motorcycle helmet that fits properly
 Eye protection (goggles, helmet face shield, or
protective eyewear)
 Over-the-ankle boots, gloves, long-sleeved
shirt or jacket, and long pants
An approved helmet and other personal protective
equipment can reduce the severity of injuries in an
accident. WARNING! Operating without an ap-
proved motorcycle helmet increases your
chances of a severe head injury or death in the
event of an accident.
[EWB01412]
Wear eye protection when operating your ATV to
reduce the risk of a serious accident or injury. Eye
protection, such as a face shield or goggles, may
reduce the risk of foreign material getting in your
eyes and help prevent loss of vision. WARNING!
Operating without eye protection can result in
an accident and increases your chances of a
severe injury in the event of an accident.[EWB02612]
Do not operate after or while consuming alco-
hol or drugs.
The operator’s performance capability is reduced
by the influence of alcohol or drugs. Consuming
alcohol or drugs could seriously affect your judg-
ment, cause you to react more slowly, and affect
your balance and perception. WARNING! Never
consume alcohol or drugs before or while driv-
ing this ATV. You increase your chance of an
accident.
[EWB01422]
1. Protective clothing
2. Goggles
3. Gloves
4. Boots
5. Helmet
UBKD60E0.book Page 4 Wednesday, November 18, 2020 8:39 AM

8-5
8Pre-operation checks
Always inspect your ATV each time you use it to
make sure the ATV is in safe operating condition.
Perform the pre-operation checks listed on page
6-1. Always follow the inspection and mainte-
nance procedures and schedules described in the
Owner’s Manual.
WARNING! Failure to inspect
the ATV before riding it or failure to maintain it
properly increases the possibility of an acci-
dent and equipment damage.
[EWB01433]
Speed limiter
For riders less experienced with this model, the
throttle lever housing is equipped with a speed
limiter. The speed limiter keeps the throttle from fully opening, even when the throttle lever is
pushed to the maximum. Turning in the adjusting
screw limits the maximum engine power available
and decreases the maximum speed of the ATV.
Turning in the adjusting screw decreases top
speed, and turning it out increases top speed.
(See page 5-4.)
Loading and accessories
WARNING
EWB00973Improper loading or towing can increase the
risk of loss of control, an overturn, or other ac-
cident. To reduce the risk of an accident:1. Adjusting screw
2. Locknut
2
1
UBKD60E0.book Page 5 Wednesday, November 18, 2020 8:39 AM

8-6
8

Do not exceed the maximum loading limits
for the vehicle (see “MAXIMUM LOADING
LIMIT” below or vehicle labeling).
 Make sure the load does not interfere with
your control or ability to see where you are
going.
 Reduce speed and allow more room to stop.
A heavier vehicle takes longer to stop.
 Avoid hills and rough terrain. Choose terrain
carefully. Use extreme caution when towing
or carrying a load on inclines.
 Turn gradually and go slowly.
As originally equipped, this ATV is not designed to
carry cargo or tow a trailer. If you choose to add
accessories to carry cargo, you must use com-
mon sense and good judgment.
Use extra caution when riding the ATV with addi-
tional loads, such as accessories or cargo. The
ATV’s handling may be adversely affected. Re-
duce your speed when adding additional loads. During operation
Always keep your feet on the footrests during op-
eration; otherwise, they may contact the rear
wheels.
WARNING! Removing even one hand or
foot can reduce your ability to control the ATV
or could cause you to lose your balance and
fall off of the ATV. If you remove a foot from a
footrest, your foot or leg may come into con-
tact with the rear wheels, which could injure
you or cause an accident.
[EWB02661]
MAXIMUM LOADING LIMIT ATV loading limit (total weight of cargo, rid-
er, accessories, and tongue):100.0 kg (220 lb)
UBKD60E0.book Page 6 Wednesday, November 18, 2020 8:39 AM

8-7
8Avoid wheelies and jumping.
WARNING! At-
tempting wheelies, jumps, and other stunts in-
creases the chance of an accident, including
an overturn. Never attempt stunts, such as
wheelies or jumps. Don’t try to show off.
[EWB01482]Modifications and accessories
Never modify this ATV through improper installa-
tion or use of accessories or other modification. All
parts and accessories added to this ATV should
be genuine Yamaha or equivalent components
designed for use on this ATV and should be in-
stalled and used according to instructions. If you have questions, consult an authorized ATV dealer.
WARNING! Operating this ATV with improper modifications may cause changes in handling
which in some situations could lead to an acci-
dent.
[EWB01492]
Exhaust system
WARNING
EWB01502 Dry grass or brush or other combustible ma-
terial accumulated around the engine area
could catch fire. Do not operate, idle, or park
the ATV in dry grass or other dry ground cov-
er. Keep the engine area free of dry grass,
brush, or other combustible material.
 Someone touching the exhaust system dur-
ing or after operation could be burned. Do
not touch the hot exhaust system. Do not
park the ATV in a place where others might
be likely to touch it. The muffler and other engine parts become ex-
tremely hot during operation and remain hot after
the engine has stopped. To reduce the risk of fire
during operation or after leaving the ATV, do not
let brush, grass and other materials collect under
the vehicle, near the muffler or exhaust pipe, or
UBKD60E0.book Page 7 Wednesday, November 18, 2020 8:39 AM

8-8
8
next to other hot parts. Check under the vehicle
after operating in areas where combustible mate-
rials may have collected. Do not idle or park the
vehicle in long dry grass or other dry ground cov-
er.
To prevent burns, avoid touching the exhaust sys-
tem. Park the ATV in a place where pedestrians or
children are not likely to touch it.
BE CAREFUL WHERE YOU RIDE
This ATV is designed for use on unpaved surfaces
only.
WARNING! Paved surfaces may seriously
affect handling and control of the ATV, and
may cause the ATV to go out of control. Always
avoid paved surfaces, including sidewalks,
driveways, parking lots and streets.
[EWB01512]
While riding on unpaved public streets or roads
may be legal in your area, such operation can in-
crease the risk of collision with other vehicles.
UBKD60E0.book Page 8 Wednesday, November 18, 2020 8:39 AM

8-9
8Watch carefully for other vehicles. Make sure you
know your country’s laws and regulations before
you ride on unpaved public streets or roads. Do
not ride on any paved public street, road or motor-
way.
WARNING! Never operate this ATV on any
paved street, paved road or motorway. You
can collide with another vehicle.
[EWB01522]
Know the terrain where you ride. Ride cautiously in
unfamiliar areas. Stay alert for holes, rocks, or
roots in the terrain, and other hidden hazards
which may cause the ATV to upset. WARNING!
The ATV could go out of control if you do not have enough time to react to hidden rocks,
bumps, or holes. Go slowly and be extra care-
ful when operating on unfamiliar terrain. Al-
ways be alert to changing terrain conditions
when operating the ATV.
[EWB01532]
Do not operate on rough, slippery, or loose terrain
until you have learned and practiced the skills nec-
essary to control the ATV on such terrain. Always
be especially cautious on these kinds of terrain.
WARNING! Failure to use extra care when op- erating on excessively rough, slippery, or loose
UBKD60E0.book Page 9 Wednesday, November 18, 2020 8:39 AM