8-25
8
To change the final gear oil
1. Park the ATV on a level surface.
2. Remove the final gear case guard by remov- ing the bolts.
3. Place an oil pan under the final gear case to collect the used oil.
4. Remove the final gear oil filler bolt, the final gear oil drain bolt and their gasket to drain the
oil from the final gear case. 5. Install the drain bolt and its new gasket, and
then tighten the bolt to the specified torque.
6. Refill with the recommended final gear oil to the brim of the filler hole as shown. NOTICE:
Be sure no foreign material enters the final
gear case.
[ECB00422]
Tightening torque: Final gear oil filler bolt:22 N·m (2.2 kgf·m, 16 lb·ft)1. Final gear case guard
2. Bolt
1
2
1. Final gear oil drain bolt
2. GasketTightening torque: Final gear oil drain bolt:22 N·m (2.2 kgf·m, 16 lb·ft)
12
UBB562E0.book Page 25 Thursday, March 14, 2019 9:59 AM
8-26
8
TIPIf the recommended oil is not available, SAE 80W-
90 API GL-5 Hypoid gear oil may be used instead.However, when using this oil, noise from the final
gear case may occur when applying the rear
brake.
7. Check the oil filler bolt gasket for damage,
and replace it if necessary.
8. Install the oil filler bolt and its gasket, and then tighten the bolt to the specified torque.
9. Check the final gear case for oil leakage. If oil is leaking, check for the cause.
10. Install the final gear case guard by installing the bolts, and then tightening them to the
specified torque.
1. Final gear oil filler bolt
2. Gasket
3. Final gear oil
4. Correct oil levelRecommended final gear oil:Yamaha Friction Modified Shaft Drive Gear Oil
Oil quantity: 0.38 L (0.40 US qt, 0.33 Imp.qt)1
2
3
4
Tightening torque: Final gear oil filler bolt:22 N·m (2.2 kgf·m, 16 lb·ft)
Tightening torque: Final gear case guard bolt:8 N·m (0.8 kgf·m, 5.9 lb·ft)
UBB562E0.book Page 26 Thursday, March 14, 2019 9:59 AM
8-28
81. 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]
TIP Do 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.
Recommended differential gear oil:
Yamaha Friction Modified Plus Shaft Drive Oil (Part No.: ACC-SHAFT-PL-32) or SAE 80
API GL-4 Hypoid gear oil
Oil quantity: 0.23 L (0.24 US qt, 0.20 Imp.qt)
1. Differential gear oil drain bolt
2. Gasket
12
Tightening torque:Differential gear oil drain bolt:10 N·m (1.0 kgf·m, 7.4 lb·ft)
UBB562E0.book Page 28 Thursday, March 14, 2019 9:59 AM
8-29
8
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. NOTICEECB02190Mix antifreeze with distilled water only. Howev-
er, if distilled water is not available, soft water
may be used for refilling. Do not use hard water
or salt water since they are harmful to the en-
gine. EBU2712ATo check the coolant level1. Park the ATV on a level surface.TIPThe coolant level must be checked on a cold en-
gine since the level varies with engine tempera-
ture. 2. Check the coolant level in the coolant reser- voir.
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)
UBB562E0.book Page 29 Thursday, March 14, 2019 9:59 AM
10-2
10
Carbon dioxide (CO2) level:Carbon dioxide (CO2) emissions (2016/1628):1015.0 g/kWh (YFM450FWB, YFM450FWBD)Engine:Combustion cycle:4-stroke
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:
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)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
UBB562E0.book Page 2 Thursday, March 14, 2019 9:59 AM
10-3
10
Differential gear oil:Type:Yamaha Friction Modified Plus Shaft Drive Oil (Part No.: ACC-SHAFT-PL-32) or SAE 80 API GL-4 Hypoid gear oil
(B5R1/B5R2/B5R3)
Yamaha Friction Modified Shaft Drive Gear Oil or SAE 80 API GL-4 Hypoid gear oil
(BJ5H/BB5R/BJ5D/BJ5E/BB5M)
Quantity: 0.23 L (0.24 US qt, 0.20 Imp.qt) (B5R1/B5R2/B5R3)
0.35 L (0.37 US qt, 0.31 Imp.qt)
(BJ5H/BB5R/BJ5D/BJ5E/BB5M)Coolant quantity:Radiator (including all routes):1.32 L (1.40 US qt, 1.16 Imp.qt)
Coolant reservoir (up to the maximum level mark): 0.25 L (0.26 US qt, 0.22 Imp.qt)Air filter:Air filter element:Wet element
Air filter oil grade: Foam air-filter oilFuel:Recommended fuel:Regular unleaded gasoline (Gasohol [E10] acceptable)
Minimum research octane: 91
Fuel tank capacity:
14 L (3.7 US gal, 3.1 Imp.gal)
Fuel reserve amount: 4.0 L (1.06 US gal, 0.88 Imp.gal)
Throttle body:ID mark:BB51 00Spark plug (s):Manufacturer/model:NGK/DR7EA
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)Drivetrain:Primary reduction ratio:1.000
Secondary reduction ratio: 7.944 (39/24 x 24/18 x 33/9)
Final drive:
Shaft
Clutch type: Wet, centrifugal, shoe
Transmission type: CVT automatic with reverse
Gear ratio:
Transmission ratio:2.550–0.750 : 1
Reverse gear:
1.706 (29/17)
Low range: 2.813 (45/16)
High range: 1.652 (38/23)Front tire:Size:AT25x8-12
UBB562E0.book Page 3 Thursday, March 14, 2019 9:59 AM
12-1
12
INDEX
AAccessories and loading ................................................ 6-5
Accessories, DC jack ................................................... 4-24
Air filter, cleaning ......................................................... 8-33
Axle boots .................................................................... 8-47BBattery ......................................................................... 8-53
Brake fluid, changing ................................................... 8-42
Brake fluid level, checking ........................................... 8-40
Brake lever free play, checking the front ..................... 8-42
Brake lever, front ......................................................... 4-14
Brake levers, checking and lubricating ........................ 8-49
Brake light switches ..................................................... 8-48
Brake pads and friction plates, checking .................... 8-40
Brake pedal and rear brake lever ................................. 4-14
Brake pedal, checking and lubricating ........................ 8-50
Brakes .......................................................................... 8-39
Brakes, front and rear .................................................... 5-3
Brake/tail light bulb, replacing ..................................... 8-63CCables, checking and lubricating ................................ 8-49
Carrier, front ................................................................. 4-20
Carrier, rear .................................................................. 4-20
Chassis fasteners .......................................................... 5-7
Cleaning ......................................................................... 9-1
Coolant .................................................................5-3, 8-29
Coolant temperature warning light ................................ 4-2DDifferential gear lock, indicator (equipped models) ....... 4-4Differential gear oil ......................................................... 5-3
Differential gear oil, changing ...................................... 8-27
Display unit .................................................................... 4-4
Drive select lever ......................................................... 4-15
Drive select lever and driving in reverse ........................ 6-2
Drive shaft universal joint, lubricating .......................... 8-51
EEmissions Certification label (for
Europe) .................... 11-2
Engine break-in .............................................................. 6-4
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge .................................. 8-19
Engine stop switch ........................................................ 4-9
Engine trouble warning light .......................................... 4-3
EPS warning light (equipped models) ............................ 4-3FFinal gear oil ......................................................... 5-3, 8-24
Four-wheel drive indicator light ..................................... 4-4
Four-wheel drive switch (On-Command 4WD) ............ 4-11
Fuel ....................................................................... 4-17, 5-3
Fuel tank cap ............................................................... 4-16
Fuses, replacing .......................................................... 8-57HHandlebar switches ....................................................... 4-7
Headlight beam, adjusting ........................................... 8-62
Headlight bulb, replacing ............................................. 8-59
Horn switch .................................................................... 4-9IIdentification numbers ................................................. 11-1
Indicator lights and warning lights ................................. 4-1
UBB562E0.book Page 1 Thursday, March 14, 2019 9:59 AM