2012 YAMAHA YFZ450 brake
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EBU17420
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 light .................. 4-2
Handlebar switches .................................... 4-3
Throttle lever .............................................. 4-3
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 Fuel cock ..................................................4-10
Starter (choke) ..........................................4-11
Seat ..........................................................4-12
Adjusting the front shock absorber
assemblies ..............................................4-13
Adjusting the rear shock absorber assembly .................................................4-14
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 a cold engine .................................6-1
Starting a warm engine ...............................6-3
Shifting ........................................................6-3
Engine break-in ...........................................6-5U1PD60E0.book Page 1 Monday, June 13, 2011 2:57 PM
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Parking ....................................................... 6-5
Parking on a slope ..................................... 6-6
Accessories and loading ............................ 6-7
RIDING YOUR ATV ...................................... 7-1 GETTING TO KNOW YOUR ATV............... 7-2
RIDE WITH CARE AND GOOD JUDGMENT .............................................. 7-2
BE CAREFUL WHERE YOU RIDE ............. 7-9
TURNING YOUR ATV .............................. 7-12
CLIMBING UPHILL ................................... 7-13
RIDING DOWNHILL.................................. 7-16
CROSSING A SLOPE............................... 7-18
CROSSING THROUGH SHALLOW WATER ................................................... 7-19
RIDING OVER ROUGH TERRAIN ........... 7-20
SLIDING AND SKIDDING ......................... 7-21
WHAT TO DO IF... .................................... 7-22
WHAT TO DO... ........................................ 7-22
PERIODIC MAINTENANCE AND
ADJUSTMENT ............................................... 8-1 Owner’s manual and tool kit ....................... 8-2
Periodic maintenance chart for the emission control system ........................... 8-3
General maintenance and lubrication chart ......................................................... 8-5 Removing and installing the panel ..............8-9
Checking the spark plug ...........................8-10
Engine oil and oil filter element .................8-14
Coolant .....................................................8-20
Cleaning the air filter element ...................8-24
Cleaning the spark arrester ......................8-28
Adjusting the carburetor ............................8-30
Checking the engine idling speed .............8-30
Adjusting the throttle lever free play .........8-31
Valve clearance ........................................8-31
Brakes .......................................................8-32
Checking the front and rear brake pads ...8-32
Checking the brake fluid level ...................8-33
Changing the brake fluid ...........................8-36
Checking the front brake lever free play ...8-36
Checking the brake pedal height ..............8-36
Adjusting the parking brake free play .......8-37
Brake light switches ..................................8-38
Adjusting the clutch lever free play ...........8-39
Drive chain slack .......................................8-41
Lubricating the drive chain ........................8-43
Checking and lubricating the cables .........8-43
Checking and lubricating the brake and
clutch levers ............................................8-44
Checking the shift pedal ...........................8-45
Checking and lubricating the brake pedal .......................................................8-45
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Checking the wheel hub bearings ............ 8-45
Lubricating the swingarm pivots ............... 8-46
Lubricating the upper and lower arm pivots ...................................................... 8-46
Lubricating the steering shaft ................... 8-47
Battery ...................................................... 8-48
Replacing the fuse ................................... 8-50
Replacing a headlight bulb ....................... 8-51
Adjusting a headlight beam ...................... 8-53
Replacing the tail/brake light bulb ............ 8-53
Removing a wheel .................................... 8-54
Installing a wheel ...................................... 8-55
Troubleshooting ....................................... 8-55
Troubleshooting charts ............................. 8-57
CLEANING AND STORAGE .......................... 9-1 Cleaning ..................................................... 9-1
Storage ....................................................... 9-2
SPECIFICATIONS ...................................... 10-1
CONSUMER INFORMATION ...................... 11-1 Identification numbers .............................. 11-1
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2-3
2speed when climbing a hill. If you stall or roll
backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.
Always check for obstacles before operating in a
new area.Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. Remember that wet brakes may have
reduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.
Always use the size and type of tires specified in
this manual.Always maintain proper tire pressure as de-
scribed in this manual.Never modify an ATV through improper installa-
tion or use of accessories.Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
WARNING
EWB00072Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon monoxide,
a deadly gas. Breathing carbon monoxide can
cause headaches, dizziness, drowsiness, nau-
sea, confusion, and eventually death.
Carbon Monoxide is a colorless, odorless,
tasteless gas which may be present even if you
do not see or smell any engine exhaust. Deadly
levels of carbon monoxide can collect rapidly
and you can quickly be overcome and unable
to save yourself. Also, deadly levels of carbon
monoxide can linger for hours or days in en-
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3-1
3
EBU17680
DESCRIPTION
EBU17690Left view
EBU17700Right view
1. Headlights
2. Fuel cock
3. Starter (choke)
4. Fuse
5. Tail/brake light
6. Coolant reservoir
7. Shift pedal
8. Engine oil tank
123 45
6
7
8
1. Spark arrester
2. Seat
3. Fuel tank cap
4. Radiator cap
5. Oil filter element
6. Brake pedal1
23
4
5
6
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3-2
3
EBU17712Controls and instrumentsTIPThe ATV you have purchased may differ slightly
from the figures shown in this manual.1. Clutch lever
2. Handlebar switches
3. Parking brake
4. Main switch
5. Throttle lever
6. Brake lever
1
2
3
4
5
6
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4-5
43. Tighten the locknut.
EBU18382Clutch lever The clutch lever is located on the left handlebar
and the ignition circuit cut-off system is incorporat-
ed in the clutch lever holder. To disengage the
clutch, pull the clutch lever toward the handlebar
grip. To engage the clutch, release the clutch lever.
The clutch lever should be pulled rapidly and re-
leased slowly for smooth clutch operation. (See
page 6-1 for a description of the ignition circuit cut-
off system.)
EBU18411Brake lever The brake lever is located at the right handlebar
grip. To apply the front brake, pull the brake lever
toward the handlebar grip.
1. Locknut
2. Adjusting screw
3. No more than 12 mm (0.47 in)
3 1
2
(a)(b)
1. Clutch lever
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4-6
4
EBU18432Brake pedal The brake pedal is located on the right side of the
ATV. To apply the rear brake, push down on the
brake pedal.
EBU18520Parking brake lever Use the parking brake before starting the engine or
parking the ATV, especially on a slope. To apply
the parking brake, move the parking brake lever in
direction (a). To release the parking brake, move
the parking brake lever in direction (b).
1. Brake lever
1
1. Brake pedal
1
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