EBU17421
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 lights and warning lights .............. 4-1
Display unit ................................................ 4-4
Self-diagnosis device .................................. 4-5
Handlebar switches .................................... 4-6
Throttle lever ............................................... 4-8
Speed limiter ............................................... 4-8
Front brake lever ......................................... 4-9
Brake pedal and rear brake lever ................ 4-9
Drive select lever ....................................... 4-10
Fuel tank cap ............................................ 4-11
Fuel ........................................................... 4-12 Seat .......................................................... 4-13
Storage compartment............................... 4-14
Front carrier .............................................. 4-15
Rear carrier ............................................... 4-15
Front and rear shock absorbers .............. 4-15
Trailer hitch (for equipped models) ........... 4-17
Auxiliary DC jack....................................... 4-18
Winch pre-wiring ...................................... 4-18
PRE-OPERATION CHECKS .......................... 5-1 Fuel ............................................................. 5-3
Engine oil .................................................... 5-3
Final gear oil ............................................... 5-3
Differential gear oil ...................................... 5-3
Coolant ....................................................... 5-3
Front and rear brakes ................................. 5-3
Throttle lever ............................................... 5-4
Tires ............................................................ 5-4
Chassis fasteners ....................................... 5-7
Instruments, lights and switches ................ 5-7
OPERATION .................................................. 6-1 Starting the engine ..................................... 6-1UBB561E0.book Page 1 Monday, March 26, 2018 11:15 AM
Operating the drive select lever and driving in reverse ....................................... 6-2
Engine break-in ........................................... 6-4
Parking ........................................................ 6-4
Parking on a slope ...................................... 6-5
Accessories and loading ............................. 6-5
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................................ 7-17
CROSSING THROUGH SHALLOW WATER .................................................... 7-18
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: Emission
control system .......................................... 8-3
Periodic maintenance chart: General maintenance and lubrication .................... 8-5
Removing and installing panels ................ 8-10
Checking the spark plug........................... 8-17
Engine oil and oil filter cartridge ............... 8-19
Final gear oil ............................................. 8-24
Changing the differential gear oil.............. 8-27
Coolant ..................................................... 8-28
Cleaning the air filter ................................. 8-32
Cleaning the spark arrester ...................... 8-35
V-belt cooling duct check hose ................ 8-36
V-belt case drain plug............................... 8-37
Adjusting the throttle lever free play ......... 8-38
Valve clearance......................................... 8-38
Brakes....................................................... 8-38
Checking the front brake pads and rear brake friction plates ................................ 8-39
Checking the brake fluid level .................. 8-39
Changing the brake fluid .......................... 8-41
Checking the front brake lever free play... 8-41
Adjusting the rear brake lever and brake pedal ....................................................... 8-41
Axle boots................................................. 8-46
Brake light switches ................................. 8-47
Checking and lubricating the cables ........ 8-48
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5-1
5
EBU19203
PRE-OPERATION CHECKS
EBU19226Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition. Always
follow the inspection and maintenance procedures and schedules described in the Owner’s Manual.
WARNING
EWB00482Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equip-
ment damage. Do not operate the vehicle if you find any problem. If a problem cannot be corrected
by the procedures provided in this manual, have the vehicle inspected by a Yamaha dealer. Before using this vehicle, check the following points:
ITEMROUTINE PAGE
Fuel • Check fuel level in fuel tank,
and add recommended fuel if neces-
sary.
• Check fuel line for leakage. Correct if necessary. 4-12, 5-3
Engine oil • Check oil level in engine, and add recommended oil to specified
level if necessary.
• Check ATV for oil leakage. Correct if necessary. 5-3, 8-19
Final gear oil • Check ATV for oil leakage. Correct if necessary. 5-3, 8-24
Differential gear oil • Check ATV for oil leakage. Correct if necessary. 5-3, 8-27
Coolant • Check coolant level in reservoir, and add recommended coolant to
specified level if necessary.
• Check cooling system for leakage. Correct if necessary. 5-3, 8-28
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5-3
5
EBU38000FuelMake sure there is sufficient gasoline in the tank
before starting off. Refuel if necessary. (See page
4-12.)EBU19561Engine oilMake sure that the engine oil is at the specified
level. Add oil as necessary. (See page 8-19.)EBU19591Final gear oilMake sure that the final gear oil is at the specified
level. Add oil as necessary. (See page 8-24.)EBU19601Differential gear oilMake sure that the differential gear oil is at the
specified level. Add oil as necessary. (See page
8-27.)EBU19632CoolantMake sure that the coolant is at the specified level.
Add coolant as necessary. (See page 8-28.)
TIPThe coolant level must be checked on a cold en-
gine since the level varies with engine tempera-
ture. EBU28533Front and rear brakesBrake levers and brake pedal
Check that there is no free play in the front
brake lever. If there is free play, have a Yamaha
dealer check the brake system.
Check for correct free play in the rear brake le-
ver and brake pedal. If the free play is incorrect,
adjust it. (See page 8-41.)
Check operation of the levers and pedal. They
should move smoothly and there should be a
firm feeling when the brake is applied. If not,
have a Yamaha dealer check them.
Brake fluid level (front brake)
Check the brake fluid level. Add fluid if necessary.
(See page 8-39.)
Specified brake fluid:DOT 4
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8-8
8
23 Differential gear oil• Change.
• Check ATV for oil leakage, and correct if neces-
sary. √√
24 Final gear oil • Change.
• Check ATV for oil leakage, and correct if neces-
sary. √ √√√
25 Cooling system • Check coolant level and ATV for coolant leakage,
and correct if necessary. √√√√√
• Replace coolant. Every 2 years
26 *Moving parts and
cables
•Lubricate.
√√√√
27 *Throttle lever • Check operation.
• Check throttle lever free play, and adjust if neces-
sary.
• Lubricate cable and lever housing. √√√√√
28 *Front and rear
brake switches • Check operation and correct if necessary.
√√√√√
29 *Lights and switches • Check operation and correct if necessary.
• Adjust headlight beams.
√√√√√
NO.
ITEM CHECK OR MAINTENANCE
JOB INITIAL
EVERY
Whichev- er comes first month136612
km (mi) 240
(150) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320UBB561E0.book Page 8 Monday, March 26, 2018 11:15 AM
8-27
8
EBU23439Changing the differential gear oilThe differential gear case must be checked for oil
leakage before each ride. If any leakage is found,
have a Yamaha dealer check and repair the ATV.
In addition, the differential gear oil must be
changed as follows at the intervals specified in the
periodic maintenance and lubrication chart.1. Park the ATV on a level surface.
2. Place an oil pan under the differential gear case to collect the used oil.
3. Remove the differential gear oil filler bolt, the differential gear oil drain bolt and their gasket
to drain the oil from the differential gear case. 4. Install the drain bolt and its new gasket, and
then tighten the bolt to the specified torque.
5. Refill with the specified amount of the recom- mended differential gear oil. NOTICE: Be
sure no foreign material enters the differ-
ential gear case.
[ECB00412]
1. Differential gear oil filler bolt
2. Gasket
21
1. Differential gear oil drain bolt
2. GasketTightening torque: Differential gear oil drain bolt:10 N·m (1.0 kgf·m, 7.4 lb·ft)
12
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8-28
8
TIPDo not exceed the specified differential gear oil
quantity when filling. Overfilling will cause the oil
to seep out of the breather hose during and af-
ter riding.
The differential gear case capacity is greater
than the recommended oil quantity, therefore
the oil level cannot be accurately checked from
the oil filler hole. 6. Check the oil filler bolt gasket for damage,
and replace it if necessary.
7. Install the oil filler bolt and its gasket, and then tighten the bolt to the specified torque. 8. Check the differential gear case for oil leak-
age. If oil is leaking, check for the cause.
EBU23472CoolantThe coolant level should be checked regularly. In
addition, the coolant must be changed at the in-
tervals specified in the periodic maintenance and
lubrication chart.TIPIf genuine Yamaha coolant is not available, use an
ethylene glycol antifreeze containing corrosion in-
hibitors for aluminum engines and mix with dis-
tilled water at a 1:1 ratio.
Recommended differential gear oil:Yamaha Friction Modified Shaft Drive Gear Oil or SAE 80 API GL-4 Hypoid gear oil
Oil quantity: 0.35 L (0.37 US qt, 0.31 Imp.qt)
Tightening torque: Differential gear oil filler bolt:23 N·m (2.3 kgf·m, 17 lb·ft)
Recommended coolant:YAMALUBE coolant
Coolant quantity: Coolant reservoir (up to full level):0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator (including all routes): 1.32 L (1.40 US qt, 1.16 Imp.qt)
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10-2
10
Cooling system:Liquid cooled
Valve train: SOHC
Number of cylinders:
Single cylinder
Displacement: 421 cm³
Bore × stroke:
84.5 × 75.0 mm (3.33 × 2.95 in)
Compression ratio:
10.0 : 1
Starting system: Electric starter
Lubrication system: Wet sumpEngine oil:Recommended brand:YAMALUBE
SAE viscosity grades: 5W-30, 10W-30, 10W-40, 15W-40, 20W-40, 20W-50 Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Quantity: Oil change:2.30 L (2.43 US qt, 2.02 Imp.qt)
With oil filter removal: 2.40 L (2.54 US qt, 2.11 Imp.qt)
Final gear oil:Type:Yamaha Friction Modified Shaft Drive Gear Oil
Quantity: 0.38 L (0.40 US qt, 0.33 Imp.qt)Differential gear oil:Type:Yamaha Friction Modified Shaft Drive Gear Oil or SAE 80
API GL-4 Hypoid gear oil
Quantity: 0.35 L (0.37 US qt, 0.31 Imp.qt)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
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