2010 YAMAHA GRIZZLY 450 engine oil

8-33
8 8. Check the sponge material and replace it if
damaged.
9. Apply Yamaha foam air filter oil or other qual-
ity foam air filter oil to the sponge material.
TIPThe sponge material should be wet but not drip-
ping.10. Pull the sponge material over the air filter ele-
ment frame, and then install the lock plate.
11. Insert the air filter element into the air filter
case, and then install the air filter case cover
by hooking the holders onto the air filter case.
NOTICE: Make sure that the air filter ele-
ment is properly seated in the air filtercase. Never operate the engine with the air
filter element removed. This will allow un-
filtered air to enter the engine, causing rap-
id engine wear and possible engine
damage. Additionally, operation without
the air filter element will affect carburetor
jetting with subsequent poor performance
and possible engine overheating.
[ECB00461]
12. Install the seat.TIPThe air filter element should be cleaned every 20–
40 hours. It should be cleaned and lubricated more
often if the ATV is operated in extremely dusty ar-
eas. Each time the air filter element maintenance
is performed, check the air inlet of the air filter case
for obstructions. Check the air filter case rubber
joint to the carburetor fittings and the rubber joint
manifold fittings for an air-tight seal. Tighten all fit-
tings securely to avoid the possibility of unfiltered
air entering the engine.EBU27081Cleaning the spark arrester Be sure the exhaust pipe and muffler are cool be-
fore cleaning the spark arrester.
1. Remove the bolts.
U37S61E0.book Page 33 Tuesday, June 2, 2009 10:33 AM

8-47
8 3. Install the panel.
EBU24901Checking and lubricating the cables The operation and the condition of all control ca-
bles should be checked before each ride, and the
cables and cable ends should be lubricated if nec-
essary. If a cable is damaged or does not move
smoothly, have a Yamaha dealer check or replace
it.
WARNING
EWB02581
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the cable
sheaths become damaged, and cables can
also become frayed or kinked, which could
restrict the operation of controls and lead to
an accident or injury.
Always make sure all control cables work
smoothly before you begin riding in cold
weather. If the control cables are frozen or do
not work smoothly, you could be unable to
control the ATV, which could lead to an acci-
dent or collision.EBU28711Checking and lubricating the front and
rear brake levers The operation of the front and rear brake levers
should be checked before each ride, and the lever
pivots should be lubricated if necessary.
1. Brake light switch
2. Brake light switch adjusting nutRecommended lubricant:
Engine oil
U37S61E0.book Page 47 Tuesday, June 2, 2009 10:33 AM

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)U37S61E0.book Page 2 Tuesday, June 2, 2009 10:33 AM

10-1
10
EBU25960
SPECIFICATIONS
Dimensions:Overall length:
1991 mm (78.4 in)
Overall width:
1093 mm (43.0 in)
Overall height:
1120 mm (44.1 in)
Seat height:
850 mm (33.5 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:
YFM450FAZ 289.0 kg (637 lb)
YFM45FGHZ 285.0 kg (628 lb)
YFM45FGZ 285.0 kg (628 lb)Noise and vibration level:Noise level (77/311/EEC):
YFM45FGHZ 78.3 dB(A)
YFM45FGZ 78.3 dB(A)
Vibration on seat (EN1032, ISO5008):
YFM45FGHZ Will not exceed 0.5 m/s²
YFM45FGZ Will not exceed 0.5 m/s²Vibration on handlebar (EN1032, ISO5008):
YFM45FGHZ Will not exceed 2.5 m/s²
YFM45FGZ 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 and recoil starter
Lubrication system:
Wet sumpEngine oil:Recommended brand:
YAMALUBE
U37S61E0.book Page 1 Tuesday, June 2, 2009 10:33 AM

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:
YFM450FAZ Yamaha Friction Modified Shaft Drive Gear
Oil (Part No.: ACC-SHAFT-LU-00)
YFM45FGHZ Yamaha Friction Modified Shaft Drive Gear
Oil
YFM45FGZ Yamaha Friction Modified Shaft Drive Gear
Oil
Quantity:
0.50 L (0.53 US qt, 0.44 Imp.qt)Differential gear oil:Type:
YFM450FAZ Yamaha Friction Modified Shaft Drive Gear
Oil (Part No.: ACC-SHAFT-LU-00) or SAE 80 API GL-4
Hypoid gear oil
YFM45FGHZ Yamaha Friction Modified Shaft Drive Gear
Oil or SAE 80 API GL-4 Hypoid gear oil
YFM45FGZ 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):
1.30 L (1.37 US qt, 1.14 Imp.qt)Air filter:Air filter element:
Wet element
-20 -10 0
1020 304050 ˚C
SAE 15W-40
SAE 20W-40SAE 20W-50
SAE 10W-40
SAE 5W-30
SAE 10W-30
U37S61E0.book Page 2 Tuesday, June 2, 2009 10:33 AM

INDEX
AAccessories and loading ................................................ 6-6
Accessories, auxiliary jack ........................................... 4-23
Air filter element, cleaning ............................................ 8-30
Axle boots .................................................................... 8-45BBattery .......................................................................... 8-51
Brake fluid, changing ................................................... 8-41
Brake fluid level, checking ........................................... 8-40
Brake lever free play, checking the front ...................... 8-41
Brake lever, front .......................................................... 4-12
Brake levers, checking and lubricating ........................ 8-47
Brake light switches ..................................................... 8-46
Brake pads and friction plates, checking ..................... 8-39
Brake pedal and brake lever free play (rear) and
brake pedal position, adjusting and checking ............ 8-42
Brake pedal and rear brake lever ................................. 4-12
Brake pedal, checking and lubricating ......................... 8-48
Brakes .......................................................................... 8-38
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................. 8-47
Carburetor, adjusting ................................................... 8-36
Carrier, front ................................................................. 4-21
Carrier, rear .................................................................. 4-21
Chassis fasteners .......................................................... 5-7
Cleaning ......................................................................... 9-1
Coolant .................................................................. 5-3, 8-26
Coolant temperature warning light ................................. 4-2
DDifferential gear oil ................................................ 5-3, 8-24
Drive select lever ......................................................... 4-13
Drive select lever and driving in reverse ........................ 6-3
Drive select lever safety system cable, adjusting ........ 8-38
Drive shaft universal joint, lubricating .......................... 8-49EEngine break-in .............................................................. 6-5
Engine, cold start ........................................................... 6-1
Engine idling speed ..................................................... 8-36
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge ................................... 8-17
Engine, starting a warm ................................................. 6-3
Engine stop switch ......................................................... 4-6FFinal gear oil ......................................................... 5-3, 8-21
Four-wheel-drive/differential gear lock indicator ............ 4-3
Fuel ....................................................................... 4-14, 5-3
Fuel cock ..................................................................... 4-16
Fuel gauge ..................................................................... 4-5
Fuel tank cap ............................................................... 4-14
Fuses, replacing .......................................................... 8-53HHandlebar switches ....................................................... 4-5
Headlight beam, adjusting ........................................... 8-57
Headlight bulb, replacing ............................................. 8-55
High-range indicator light ............................................... 4-3
Horn switch .................................................................... 4-6
U37S61E0.book Page 1 Tuesday, June 2, 2009 10:33 AM