tire pressure YAMAHA GRIZZLY 450 2012 Owners Manual

1-6
1
**.* kPa
*.** kgf/cm²*.* psi **.* kPa
*.** kgf/cm²
*.* psi
NEVER use with drugs or alcohol.
NEVER store fuel or flammable liquids.
This unit contains high-pressure nitrogen
gas.
Mishandling can cause an explosion. Do not
incinerate, puncture or open.
Use unleaded gasoline only.
Measure the tire pressure when the tires are
cold. Adjust the tire pressure.
Improper tire pressure can cause loss of
control.
Loss of control can result in severe injury or
death.
Turning the ATV in 4WD-LOCK
(“DIFF.LOCK”) takes more effort.
Operate at a slow speed and allow extra
time and distance for maneuvers to avoid
loss of control.
This pictogram shows the loading limits
and/or maximum load capacity for this ATV.
Follow all load limits and other loading
guidelines in this manual.
Load may include the driver, passenger,
human protective gear, accessories, goods,
luggage, and all other load related items.
Make sure you do not exceed the load limits.
Overloading can cause loss of control.
Loss of control can result in severe injury or
death.
U1CT61E0.book Page 6 Wednesday, April 20, 2011 6:36 PM

2-3
2steady speed 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 be sure there are no obstacles or people
behind you when you operate in reverse. When
it is safe to proceed in reverse, go slowly.
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
U1CT61E0.book Page 3 Wednesday, April 20, 2011 6:36 PM

5-2
5
Front brake
Check operation. If soft or spongy, have Yamaha dealer bleed hy-
draulic system.
 Check brake pads for wear, and replace if necessary.
 Check brake fluid level in reservoir, and add specified brake fluid to
specified level if necessary.
 Check hydraulic system for leakage. Correct if necessary. 5-3, 8-39, 8-40, 8-41
Rear brake 
Check operation, and correct if necessary.
 Lubricate cables if necessary.
 Check lever and pedal free play, and adjust if necessary. 5-3, 8-39, 8-41
Throttle lever 
Make sure that operation is smooth. Lubricate cable and lever hous-
ing if necessary.
 Check lever free play, and adjust if necessary. 5-4, 8-37
Control cables Make sure that operation is smooth. Lubricate if necessary. 8-47
Wheels and tires 
Check wheel condition, and replace if damaged.
 Check tire condition and tread depth. Replace if necessary.
 Check air pressure. Correct if necessary. 5-4
Brake pedal 
Make sure that operation is smooth. Lubricate pedal pivoting point if
necessary. 8-48
Brake levers 
Make sure that operation is smooth. Lubricate lever pivoting points if
necessary. 8-48
Axle boots Check for cracks or damage, and replace if necessary. 8-46
Chassis fasteners Make sure that all nuts, bolts and screws are properly tightened. 5-7
Instruments, lights and
switches 
Check operation, and correct if necessary. 5-7
ITEM ROUTINE PAGE
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5-4
5
Brake fluid leakage (front brake)
Check to see if any brake fluid is leaking out of the
hose, joint or brake fluid reservoir of the front
brake. Apply the brake firmly for one minute. If the
lever moves slowly inward, there may be a leak in
the brake system. If there is any leakage, the brake
system should be checked by a Yamaha dealer.
Brake operation
Test the brakes at slow speed after starting out to
make sure they are working properly. If the brakes
do not provide proper braking performance, check
the brake pads and friction plates for wear. (See
page 8-39.)
EBU19761Throttle lever Check the operation of the throttle lever. It must
open smoothly and spring back to the idle position
when released. Have a Yamaha dealer correct if
necessary.EBU19814Tires Check tire pressure regularly to make sure it is at
the recommended specifications. Also check for
wear and damage. Tire pressure
Use the low-pressure tire gauge to check and ad-
just tire pressures when the tires are cold. Tire
pressures must be equal on both sides.
WARNING! Operation of this vehicle with im- proper tire pressure may cause severe injury
or death from loss of control or rollover. Tire
pressure below the minimum specified could
also cause the tire to dislodge from the rim un-
der severe riding conditions.
[EWB02541]
Set tire
pressures to the following specifications:
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5-5
5The low-pressure tire gauge is included as stan-
dard equipment. Make two measurements of the
tire pressure and use the second reading. Dust or
dirt in the gauge could cause the first reading to be
incorrect. Tire wear limit
When the tire groove decreases to 3 mm (0.12 in)
due to wear, replace the tire.
Recommended tire pressure:
Fro nt25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Rear 25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Minimum tire pressure: Fro nt22.0 kPa (0.220 kgf/cm ², 3.2 psi)
Rear 22.0 kPa (0.220 kgf/cm ², 3.2 psi)
Maximum tire seating pressure: Fro nt250 kPa (2.5 kgf/cm ², 36 psi)
Rear 250 kPa (2.5 kgf/cm ², 36 psi)
1. Low-pressure tire gauge
U1CT61E0.book Page 5 Wednesday, April 20, 2011 6:36 PM

8-2
8
EBU21731Owner’s manual and tool kit Be sure to put this owner ’s manual in the plastic
bag and always carry it on the bottom of the seat
as shown. Put the owner ’s tool kit and low-pres-
sure tire gauge under the seat.
The service information included in this manual
and the tools provided in the owner ’s tool kit are in-
tended to assist you in the performance of preven-
tive maintenance and minor repairs. However, additional tools such as a torque wrench may be
necessary to perform certain maintenance work
correctly.
TIPIf you do not have the tools or experience required
for a particular job, have a Yamaha dealer perform
it for you.
1. Owner
’s manual
2. Owner ’s tool kit
3. Low-pressure tire gaugeU1CT61E0.book Page 2 Wednesday, April 20, 2011 6:36 PM

8-6
8
4*Brake hoses 
Check for cracks or other damage, and replace if
necessary. √√√√
 Replace. Every 4 years
5 *Wheels 
Check runout and for damage, and replace if nec-
essary. √ √√√
6 *Tires 
Check tread depth and for damage, and replace if
necessary.
 Check air pressure and balance, and correct if
necessary. √ √√√
7 *Wheel hub bearings 
Check for looseness or damage, and replace if
necessary. √ √√√
8 *V- b e l t 
Check for wear, cracks or other damage, and re-
place if necessary. √ √√√
9 *Drive shaft univer-
sal joint 
Lubricate with lithium-soap-based grease. √√√
10 *Chassis fasteners 
Make sure that all nuts, bolts, and screws are
properly tightened. √√√√√
11 *Shock absorber as-
semblies 
Check operation and correct if necessary.
 Check for oil leakage and replace if necessary. √√√
12 *Stabilizer bushes 
Check for cracks or other damage, and replace if
necessary. √√√
NO. ITEM
CHECK OR MAINTENANCE
JOB INITIAL EVERY
Whichev- er comes first month136612
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320
U1CT61E0.book Page 6 Wednesday, April 20, 2011 6:36 PM

9-2
9
EBU25933Storage Short-term
Always store your ATV in a cool, dry place and, if
necessary, protect it against dust with a porous
cover. NOTICE: Storing the ATV in a poorly ven-
tilated room or covering it with a tarp while it is
still wet, will allow water and humidity to seep
in and cause rust. To prevent corrosion, avoid
damp cellars, stables (because of the presence
of ammonia) and areas where strong chemi-
cals are stored.
[ECB00721]
Long-term
Before storing your ATV for several months: 1. Follow all the instructions in the “ Cleaning”
section of this chapter.
2. Turn the fuel cock lever to “OFF ”.
3. Drain the carburetor float chamber by loosen- ing the drain bolt; this will prevent fuel deposits
from building up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel stabilizer (if available) to prevent the fuel from deteriorat-
ing. 5. Perform the following steps to protect the cyl-
inder, piston rings, etc. from corrosion.a. Remove the spark plug cap and spark plug.
b. Pour a teaspoonful of engine oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with the starter. (This will coat the cylinder wall with
oil.)
e. Remove the spark plug cap from the spark plug, and then install the spark plug and
the spark plug cap.
6. Lubricate all control cables and the pivoting points of all levers and pedals.
7. Check and, if necessary, correct the tire air pressure, and then block up the ATV so that
all of its wheels are off the ground. Alternative-
Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)U1CT61E0.book Page 2 Wednesday, April 20, 2011 6:36 PM

10-3
10
Clutch:Clutch type:Wet, centrifugal automaticTransmission:Primary reduction system:V-belt
Secondary reduction system: Shaft drive
Secondary reduction ratio:
39/24 × 24/18 × 33/9 (7.944)
Transmission type: V-belt automatic
Operation: Left hand operation
Reverse gear:
29/17 (1.706)
Low range: 45/16 (2.813)
High range: 38/23 (1.652)Chassis:Frame type:Steel tube frame
Caster angle: 2.5 °
Trail:
8.5 mm (0.33 in)Front tire:Type:Tubeless Size:
AT25 x 8-12
Manufacturer/model: YFM450FAPB CHENG SHIN/C-828
YFM45FGPB MAXXIS/MU13
YFM45FGPHB MAXXIS/MU13
Rear tire:Type:Tubeless
Size:
AT25 x 10-12
Manufacturer/model: YFM450FAPB CHENG SHIN/C-828
YFM45FGPB MAXXIS/MU14
YFM45FGPHB MAXXIS/MU14Loading:Maximum loading limit:210.0 kg (463 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:Front: 25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Rear: 25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Minimum:
Front: 22.0 kPa (0.220 kgf/cm ², 3.2 psi)
Rear:
22.0 kPa (0.220 kgf/cm ², 3.2 psi)
U1CT61E0.book Page 3 Wednesday, April 20, 2011 6:36 PM