Page 106 of 146

8-23
86. Wash the sponge material gently but thor-
oughly in solvent. WARNING! Always use
parts cleaning solvent to clean the sponge
material. Never use low-flash-point sol-
vents or gasoline to clean the sponge ma-
terial because the engine could catch fire
or explode.
[EWB01941]
7. Squeeze the excess solvent out of the sponge
material and let it dry. NOTICE: Do not twist
the sponge material when squeezing it.
[ECB00441]
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 filter
1. Air filter element frame
2. Sponge material
3. Air filter element lock plateU4S264E0.book Page 23 Thursday, August 5, 2010 1:24 PM
Page 107 of 146

8-24
8 case. 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.EBU27082Cleaning the spark arrester Be sure the exhaust pipe and muffler are cool be-
fore cleaning the spark arrester.
1. Remove the tailpipe bolts.2. Remove the tailpipe by pulling it out of the
muffler.
3. Tap the tailpipe lightly, and then use a wire
brush to remove any carbon deposits from the
spark arrester portion of the tailpipe and inside
of the tailpipe housing.
1. Tailpipe bolt
2. Tailpipe
U4S264E0.book Page 24 Thursday, August 5, 2010 1:24 PM
Page 138 of 146

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:
2.20 L (2.33 US qt, 1.94 Imp.qt)
With oil filter cartridge replacement:
2.30 L (2.43 US qt, 2.02 Imp.qt)Final gear oil:Type:
YFM35FGIA Yamaha Friction Modified Shaft Drive Gear
Oil
YFM35FWANA Yamaha Friction Modified Shaft Drive
Gear Oil (Part No.: ACC-SHAFT-LU-00)Quantity:
0.50 L (0.53 US qt, 0.44 Imp.qt)
Differential gear oil:Type:
YFM35FGIA Yamaha Friction Modified Shaft Drive Gear
Oil or SAE 80 API GL-4 Hypoid gear oil
YFM35FWANA Yamaha Friction Modified Shaft Drive
Gear Oil (Part No.: ACC-SHAFT-LU-00) or SAE 80 API
GL-4 Hypoid gear oil
Quantity:
0.23 L (0.24 US qt, 0.20 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
YFM35FGIA Regular unleaded gasoline only
YFM35FWANA Unleaded gasoline only
Fuel tank capacity:
13.5 L (3.57 US gal, 2.97 Imp.gal)
Fuel reserve amount:
3.3 L (0.87 US gal, 0.73 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)
0 10 30 50 70 90 110 130 ˚F
–20 –10 0 10 20 30 40 50 ˚CSAE 5W-30
SAE 10W-30
SAE 10W-40
SAE 15W-40
SAE 20W-40SAE 20W-50
U4S264E0.book Page 2 Thursday, August 5, 2010 1:24 PM
Page 144 of 146

INDEX
AAccessories and loading ................................................ 6-6
Air filter element, cleaning ............................................ 8-21
Axle boots .................................................................... 8-36BBattery .......................................................................... 8-41
Brake fluid, changing .................................................... 8-31
Brake fluid level, checking ............................................ 8-30
Brake lever free play, checking the front ...................... 8-32
Brake lever, front .......................................................... 4-10
Brake levers, checking and lubricating ......................... 8-38
Brake light switches ..................................................... 8-37
Brake pads and friction plates, checking ...................... 8-29
Brake pedal and rear brake lever ................................. 4-11
Brake pedal, checking and lubricating ......................... 8-39
Brakes .......................................................................... 8-29
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................. 8-37
Carburetor, adjusting .................................................... 8-26
Carrier, front ................................................................. 4-19
Carrier, rear .................................................................. 4-19
Chassis fasteners ........................................................... 5-6
Cleaning ......................................................................... 9-1DDifferential gear oil ................................................ 5-3, 8-18
Drive select lever .......................................................... 4-12
Drive select lever and driving in reverse ........................ 6-3Drive select lever safety system cable, adjusting ......... 8-29
Drive shaft universal joint, lubricating ........................... 8-40
EEngine break-in .............................................................. 6-4
Engine, cold start ........................................................... 6-1
Engine idling speed ...................................................... 8-26
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge ................................... 8-12
Engine, starting a warm ................................................. 6-3
Engine stop switch ......................................................... 4-4FFinal gear oil .......................................................... 5-3, 8-16
Four-wheel-drive indicator light ...................................... 4-3
Fuel ....................................................................... 4-13, 5-3
Fuel cock ...................................................................... 4-15
Fuel tank cap ................................................................ 4-13
Fuses, replacing ........................................................... 8-44HHandlebar switches ........................................................ 4-4
Headlight beam, adjusting ............................................ 8-47
Headlight bulb, replacing .............................................. 8-45
Horn switch .................................................................... 4-5IIdentification numbers .................................................. 11-1
Indicator lights and warning light .................................... 4-2
Instruments, lights and switches .................................... 5-6LLabel locations ............................................................... 1-1
U4S264E0.book Page 1 Thursday, August 5, 2010 1:24 PM