2021 YAMAHA YFZ450R warning light

8-18
8
As you travel across a slope, lean your body in the
uphill direction. It may be necessary to correct the
steering when riding on loose surfaces by pointing
the front wheels slightly uphill. When riding on
slopes, be sure not to make sharp turns either up
or down hill.
If your ATV does begin to tip over, gradually steer
in the downhill direction if there are no obstacles
in your path. As you regain proper balance, grad-
ually steer again in the direction you wish to travel.
CROSSING THROUGH SHALLOW WATER
WARNING
EWB01642Operating this vehicle through deep or fast-
flowing water can lead to loss of control or an
overturn. To reduce your risk of drowning or
other injuries, use care when crossing through
water. Never operate this ATV water deeper
than the depth specified in your Owner’s Man-
ual, as tires may float, increasing the risk of an
overturn. The ATV can be used to cross slow moving, shal-
low water of up to a maximum of 35 cm (14 in) in
depth. Before entering the water, choose your
path carefully. Enter where there is no sharp drop
off, and avoid rocks or other obstacles which may
be slippery or upset the ATV. Drive slowly and
carefully.
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9
8. Turn in the adjusting bolt at the rear brake cal-
iper until it feels tight, then turn it out 1/8 turn
and tighten its locknut to the specified torque.
NOTICE: When tightening the locknut,
hold the adjusting bolt with a wrench so
that it does not turn together with the lock-
nut.
[ECB00522]
WARNING
EWB02091Operating with improperly serviced or adjust-
ed brakes could cause the brakes to malfunc-
tion, resulting in reduced braking
performance. This could increase the chance
of a collision or accident. After adjusting the
parking brake free play, block the rear of the
ATV off the ground and spin the rear wheels.
Check to make sure there is no brake drag. If
brake drag is noticed, perform the adjustment
again.
EBU24744Brake light switchesThe brake light, which is activated by the brake
pedal and brake lever, should come on just before
braking takes effect.
The brake light switch for the brake pedal can be
adjusted as follows, but the front brake light
switch should be adjusted by a Yamaha dealer.
Turn the rear brake light switch adjusting nut while
holding the brake light switch in place. To make
the brake light come on earlier, turn the adjusting
nut in direction (a). To make the brake light come
on later, turn the adjusting nut in direction (b).
Tightening torque:
Locknut (rear brake caliper):16 N·m (1.6 kgf·m, 12 lb·ft)1. Rear brake light switch
2. Rear brake light switch adjusting nut
1
2(a) (b)
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9
EBU29963Replacing the fuseThe fuse holder is located under the seat. (See
page 5-10.)
If the fuse is blown, replace it as follows.1. Turn the key to “ ” (off) and turn off all elec- trical circuits.NOTICEECB00641To prevent accidental short-circuiting, turn off
the main switch when checking or replacing a
fuse.
2. Remove the blown fuse, and then install anew fuse of the specified amperage.
WARNING! Always use a fuse of the spec- ified rating, and never use a substitute ob-
ject in place of the proper fuse. An
improper fuse or a substitute object can
cause damage to the electrical system,
which could lead to a fire.
[EWB02173]
3. Turn the key to “ ” (on) and turn on the elec- trical circuits to check if the devices operate.
4. If the fuse immediately blows again, have a Yamaha dealer check the electrical system.EBU30873Replacing a headlight bulbIf a headlight bulb burns out, replace it with the
specified bulb as follows.1. Remove the headlight unit by removing the bolt and pulling the headlight unit outward as
shown.
1. Fuse
2. Spare fuse
1
2
Specified fuse:20.0 A
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9
WARNING
EWB02281Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe inju-
ry or property damage. Make sure there are no
open flames or sparks in the area, including pi-
lot lights from water heaters or furnaces. UBKD60E0.book Page 51 Wednesday, November 18, 2020 8:39 AM

11-4
11
Spring:Coil spring
Shock absorber: Gas-hydraulic damper
Wheel travel:
250 mm (9.9 in)Rear suspension:Type:Swingarm (link suspension)
Spring:
Coil spring
Shock absorber: Gas-hydraulic damper
Wheel travel: 280 mm (11.0 in)Electrical system:System voltage:12 V
Ignition system: TCI
Charging system:
AC magnetoBattery:Model:YTZ7S
Voltage, capacity:
12 V, 6.0 AhLights:Headlight:T19L, 30.0 W/30.0 W Brake/tail light:
LED
Neutral indicator light: LED
Fuel level warning light:
LED
Coolant temperature warning light: LED
Engine trouble warning light: LED
Fuses:Main fuse:20.0 AEBU30403Noise and vibration levels statement (for Eu-
rope)
The figures quoted are emission levels and are not
necessarily safe working levels. Whilst there is a
correlation between the emission and exposure
levels, this cannot be used reliably to determine
whether or not further precautions are required.
Factors that influence the actual level of exposure
of work-force include the characteristics of the
work room, the other sources of noise, etc. i.e. the
number of machines and other adjacent process-
es, and the length of time for which an operator is
exposed to the noise. Also the permissible expo-
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12
INDEX
AAccessories and loading ................................................ 7-5
Air filter element, cleaning ........................................... 9-22BBattery ......................................................................... 9-43
Brake and clutch levers, checking and lubricating ...... 9-39
Brake fluid, changing ................................................... 9-31
Brake fluid level, checking ........................................... 9-30
Brake lever ..................................................................... 5-5
Brake lever free play, checking the front ..................... 9-32
Brake light switches ..................................................... 9-34
Brake pads, checking the front and rear ..................... 9-29
Brake pedal .................................................................... 5-6
Brake pedal, checking and lubricating ........................ 9-40
Brake pedal height, checking ...................................... 9-32
Brakes .......................................................................... 9-28
Brakes, front and rear .................................................... 6-4
Brake/tail light .............................................................. 9-49CCables, checking and lubricating ................................ 9-38
Chassis fasteners .......................................................... 6-7
Cleaning ....................................................................... 10-1
Clutch lever .................................................................... 5-5
Clutch lever free play, adjusting .................................. 9-35
Coolant .................................................................6-4, 9-20
Coolant, changing ........................................................ 9-22
Coolant temperature warning light ................................ 5-2
Cowling and panels, removing and installing .............. 9-10
DDrive chain ..................................................................... 6-5
Drive chain, lubricating ................................................ 9-38
Drive chain slack .......................................................... 9-36EEngine break-in .............................................................. 7-4
Engine oil ....................................................................... 6-4
Engine oil and oil filter element .................................... 9-14
Engine, start ................................................................... 7-1
Engine stop switch ........................................................ 5-3
Engine trouble warning light .......................................... 5-2FFuel ......................................................................... 5-9, 6-4
Fuel level warning light .................................................. 5-2
Fuel tank cap ................................................................. 5-8
Fuse, replacing ............................................................ 9-46HHandlebar position, adjusting ...................................... 5-23
Handlebar switches ....................................................... 5-3
Headlight beam, adjusting ........................................... 9-49
Headlight bulb, replacing ............................................. 9-46IIdentification numbers ................................................... 1-1
Indicator light and warning lights ................................... 5-1
Instruments, lights and switches ................................... 6-7LLabel locations ............................................................... 2-1
Light switch ................................................................... 5-3
UBKD60E0.book Page 1 Wednesday, November 18, 2020 8:39 AM