YAMAHA GRIZZLY 450 2011 Owners Manual

8-62
8 Engine overheating
WARNING
EWB02290Wait for the engine and radiator to cool before removing the radiator cap. You could be burned by
hot fluid and steam blown out under pressure. Always put a thick rag over the cap when opening.
Allow any remaining pressure to escape before completely removing the cap.TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the rec-
ommended coolant as soon as possible.Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer check
and repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again, have a
Yamaha dealer check and repair the cooling system.
There is
leakage.
There is
no leakage.
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9
EBU25860
CLEANING AND STORAGE
EBU25881Cleaning Frequent, thorough cleaning of your ATV will not
only enhance its appearance but will improve its
general performance and extend the useful life of
many components.
1. Before cleaning the ATV:
a. Block off the end of the exhaust pipe to
prevent water entry. A plastic bag and
strong rubber band may be used.
b. Make sure the spark plug and all filler caps
are properly installed.
2. If the engine case is excessively greasy, apply
degreaser with a paint brush. Do not apply de-
greaser to the wheel axles.
3. Rinse the dirt and degreaser off with a garden
hose. Use only enough pressure to do the job.
WARNING! Wet brakes may have reduced
stopping ability, increasing the chance of
an accident. Test the brakes after washing.
Apply the brakes several times at slow
speeds to let friction dry out the linings.
[EWB02311]
NOTICE: Excessive water pressure
may cause water seepage and deteriora-tion of wheel bearings, brakes, transmis-
sion seals and electrical devices. Many
expensive repair bills have resulted from
improper high-pressure detergent applica-
tions such as those available in coin-oper-
ated car washers.
[ECB00711]
4. Once most of the dirt has been hosed off,
wash all surfaces with warm water and mild,
detergent-type soap. An old toothbrush or bot-
tle brush is handy for hard-to-reach places.
5. Rinse the ATV off immediately with clean wa-
ter and dry all surfaces with a chamois, clean
towel or soft absorbing cloth.
6. Clean the seat with a vinyl upholstery cleaner
to keep the cover pliable and glossy.
7. Automotive type wax may be applied to all
painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
abrasives which may mar the paint or protec-
tive finish. When finished cleaning, start the
engine and let it idle for several minutes.
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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)U1CT60E0.book Page 2 Monday, May 31, 2010 10:05 AM

9-3
9ly, turn the wheels a little every month in order
to prevent the tires from becoming degraded
in one spot.
8. Cover the muffler outlet with a plastic bag to
prevent moisture from entering it.
9. Remove the battery and fully charge it. Store
it in a cool, dry place and charge it once a
month. Do not store the battery in an exces-
sively cold or warm place [less than 0 °C (30
°F) or more than 30 °C (90 °F)]. For more in-
formation on storing the battery, see page
8-51.
TIPMake any necessary repairs before storing the
ATV.U1CT60E0.book Page 3 Monday, May 31, 2010 10:05 AM

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10
EBU25960
SPECIFICATIONS
Dimensions:Overall length:
1993 mm (78.5 in)
Overall width:
1093 mm (43.0 in)
Overall height:
1120 mm (44.1 in)
Seat height:
840 mm (33.1 in)
Wheelbase:
1233 mm (48.5 in)
Ground clearance:
245 mm (9.6 in)
Minimum turning radius:
3000 mm (118 in)Weight:With oil and fuel:
YFM450FAPA 287.0 kg (633 lb)
YFM45FGPA 281.0 kg (619 lb)
YFM45FGPHA 281.0 kg (619 lb)
YFM45FGPSA 284.0 kg (626 lb)Noise and vibration level:Noise level (77/311/EEC):
YFM45FGPA 78.3 dB(A)
YFM45FGPHA 78.3 dB(A)
YFM45FGPSA 78.3 dB(A)Vibration on seat (EN1032, ISO5008):
YFM45FGPA 0.6 m/s²
YFM45FGPHA 0.6 m/s²
YFM45FGPSA 0.6 m/s²
Vibration on handlebar (EN1032, ISO5008):
YFM45FGPA Will not exceed 2.5 m/s²
YFM45FGPHA Will not exceed 2.5 m/s²
YFM45FGPSA Will not exceed 2.5 m/s²
Engine:Engine type:
Liquid cooled 4-stroke, SOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
421 cm³
Bore × stroke:
84.5 × 75.0 mm (3.33 × 2.95 in)
Compression ratio:
10.00 :1
Starting system:
Electric starter
Lubrication system:
Wet sumpEngine oil:Recommended brand:
YAMALUBE
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10-2
10
Type:
SAE 5W-30, 10W-30, 10W-40, 15W-40, 20W-40 or 20W-
50
Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Engine oil quantity:
Without oil filter cartridge replacement:
2.30 L (2.43 US qt, 2.02 Imp.qt)
With oil filter cartridge replacement:
2.40 L (2.54 US qt, 2.11 Imp.qt)
Final gear oil:Type:
YFM450FAPA Yamaha Friction Modified Shaft Drive
Gear Oil (Part No.: ACC-SHAFT-LU-00)
YFM45FGPA Yamaha Friction Modified Shaft Drive Gear
Oil
YFM45FGPHA Yamaha Friction Modified Shaft Drive
Gear Oil
YFM45FGPSA Yamaha Friction Modified Shaft Drive
Gear Oil
Quantity:
0.38 L (0.40 US qt, 0.33 Imp.qt)Differential gear oil:Type:
YFM450FAPA Yamaha Friction Modified Shaft Drive
Gear Oil (Part No.: ACC-SHAFT-LU-00) or SAE 80 API
GL-4 Hypoid gear oil
YFM45FGPA Yamaha Friction Modified Shaft Drive Gear
Oil or SAE 80 API GL-4 Hypoid gear oil
YFM45FGPHA Yamaha Friction Modified Shaft Drive
Gear Oil or SAE 80 API GL-4 Hypoid gear oil
YFM45FGPSA Yamaha Friction Modified Shaft Drive
Gear Oil or SAE 80 API GL-4 Hypoid gear oil
Quantity:
0.23 L (0.24 US qt, 0.20 Imp.qt)Cooling system:Coolant reservoir capacity (up to the maximum level mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator capacity (including all routes):
1.32 L (1.40 US qt, 1.16 Imp.qt)
-20 -10 0
1020 304050 ˚C
SAE 15W-40
SAE 20W-40SAE 20W-50
SAE 10W-40
SAE 5W-30
SAE 10W-30
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10-3
10
Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
YFM450FAPA Unleaded gasoline only
YFM45FGPA Regular unleaded gasoline only
YFM45FGPHA Regular unleaded gasoline only
YFM45FGPSA Regular unleaded gasoline only
Fuel tank capacity:
15.0 L (3.96 US gal, 3.30 Imp.gal)
Fuel reserve amount:
4.5 L (1.19 US gal, 0.99 Imp.gal)Carburetor:Type × quantity:
BSR33 x 1Spark plug (s):Manufacturer/model:
NGK/DR8EA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)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:
YFM450FAPA CHENG SHIN/C-828
YFM45FGPA MAXXIS/MU13
YFM45FGPHA MAXXIS/MU13
YFM45FGPSA MAXXIS/MU13Rear tire:Type:
Tubeless
Size:
AT25 x 10-12
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10-4
10
Manufacturer/model:
YFM450FAPA CHENG SHIN/C-828
YFM45FGPA MAXXIS/MU14
YFM45FGPHA MAXXIS/MU14
YFM45FGPSA 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/cm², 3.6 psi)
Rear:
25.0 kPa (0.250 kgf/cm², 3.6 psi)
Minimum:
Front:
22.0 kPa (0.220 kgf/cm², 3.2 psi)
Rear:
22.0 kPa (0.220 kgf/cm², 3.2 psi)Front wheel:Wheel type:
YFM450FAPA Panel wheel
YFM45FGPA Panel wheel
YFM45FGPHA Panel wheel
YFM45FGPSA Cast wheel
Rim size:
12 x 6.0AT
Rear wheel:Wheel type:
YFM450FAPA Panel wheel
YFM45FGPA Panel wheel
YFM45FGPHA Panel wheel
YFM45FGPSA Cast wheel
Rim size:
12 x 7.5ATFront brake:Type:
Dual disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4Rear brake:Type:
Wet multiple disc brake
Operation:
Left hand and right foot operationFront suspension:Type:
Double wishbone
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
160 mm (6.3 in)Rear suspension:Type:
Double wishbone
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10-5
10
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
180 mm (7.1 in)Electrical system:Ignition system:
DC CDI
Charging system:
AC magnetoBattery:Model:
YTX20L-BS
Voltage, capacity:
12 V, 18.0 AhHeadlight:Bulb type:
Krypton bulbBulb voltage, wattage × quantity:Headlight:
12 V, 30.0/30.0 W × 2
Tail/brake light:
12 V, 5.0/21.0 W × 1
Meter lighting:
EL (Electroluminescent)
Neutral indicator light:
LED
Reverse indicator light:
LED
Coolant temperature warning light:
LEDPark indicator light:
LED
On-Command four-wheel-drive/differential gear lock
indicator:
LCD
High-range indicator light:
LED
Low-range indicator light:
LED
Differential gear lock indicator light:
LED
EPS warning light:
12 V, 1.7 W
Fuses:Main fuse:
30.0 A
EPS fuse:
40.0 A
Headlight fuse:
15.0 A
Signaling system fuse:
10.0 A
Ignition fuse:
10.0 A
Auxiliary DC jack fuse:
10.0 A
Backup fuse:
5.0 A
Four-wheel-drive motor fuse:
10.0 A
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11
EBU26000
CONSUMER INFORMATION
EBU28200Identification numbers Record the vehicle identification number and mod-
el label information in the spaces provided below
for assistance when ordering spare parts from a
Yamaha dealer or for reference in case the ATV is
stolen.
VEHICLE IDENTIFICATION NUMBER:
MODEL LABEL INFORMATION:EBU26041Vehicle identification number
The vehicle identification number is stamped into
the frame.The year of manufacture is listed in the vehicle
identification number as shown in the illustration.
1. Vehicle identification number (front left side)
U1CT60E0.book Page 1 Monday, May 31, 2010 10:05 AM