6-4
6
TIPWhen in reverse, the reverse indicator light
should come on. If the indicator light does not
come on, have a Yamaha dealer check the elec-
trical circuit.
Due to the synchronizing mechanism in the en-
gine, the indicator light may not come on until
the ATV starts moving.
4. Check behind for people or obstacles, and
then release the brake pedal.
5. Open the throttle lever gradually and continue to watch to the rear while backing.EBU20683Engine break-inTIPFor ATVs equipped with an odometer or an hour
meter, follow the figures given in km (mi) or the
figures given in hours.
For ATVs not equipped with an odometer or
hour meter, follow the figures given in hours. There is never a more important period in the life
of your engine than the first 320 km (200 mi) or 20
hours of riding. For this reason, you should read
the following material carefully.
Since the engine is brand new, do not put an ex-
cessive load on it for the first 320 km (200 mi) or
20 hours. The various parts in the engine wear and
polish themselves to the correct operating clear-
ances. During this period, prolonged full-throttle
operation or any condition that might result in en-
gine overheating must be avoided.
1. Drive select lever
2. L (Low-range)
3. H (High-range)
4. N (Neutral)
5. R (Reverse)
6. P (Park)
1
23456
LHNRP
UB1660E0.book Page 4 Thursday, February 26, 2015 4:01 PM
8-19
8
4. Remove the spark plug as shown, with the
spark plug wrench included in the owner’s
tool kit.
To check the spark plug 1. Check that the porcelain insulator around the center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the vehi-
cle is ridden normally).
TIPIf the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the vehicle. 2. Check the spark plug for electrode erosionand excessive carbon or other deposits, and
replace it if necessary.
3. Measure the spark plug gap with a wire thick- ness gauge and, if necessary, adjust the gap
to specification.
1. Spark plug wrench
1
Specified spark plug:NGK/CPR7EA-9
UB1660E0.book Page 19 Thursday, February 26, 2015 4:01 PM
8-40
8case. Never operate the engine with the air
filter element removed. Doing so would al-
low unfiltered air to enter the engine, caus-
ing rapid engine wear and possible engine
damage. Additionally, the fuel injection
system would be affected resulting in poor
engine performance and possible over-
heating.
[ECB00763]
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 areas. Each time the air filter element main-
tenance is performed, check the air inlet of the air
filter case for obstructions. Check the air filter
case rubber joint to the throttle body and the rub-
ber joint manifold fittings for an air-tight seal.
Tighten all fittings securely to avoid the possibility
of unfiltered air entering the engine. EBU28904Cleaning the spark arresterBe 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, and then remove the gasket.
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
1
1
UB1660E0.book Page 40 Thursday, February 26, 2015 4:01 PM
12-1
12
INDEX
AAccessories and loading ................................................ 6-6
Accessories, auxiliary jack ........................................... 4-25
Air filter element, cleaning ............................................ 8-37
Axle boots .................................................................... 8-48BBattery .......................................................................... 8-54
Brake fluid, changing ...................................................8-45
Brake fluid level, checking ........................................... 8-44
Brake lever free play, checking the front ..................... 8-45
Brake lever, front .......................................................... 4-17
Brake levers, checking and lubricating ........................ 8-50
Brake light switches ..................................................... 8-49
Brake pads and friction plates, checking ..................... 8-43
Brake pedal and rear brake lever ................................. 4-17
Brake pedal, checking and lubricating ........................ 8-51
Brakes .......................................................................... 8-43
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................. 8-49
Carrier, front ................................................................. 4-23
Carrier, rear .................................................................. 4-23
Chassis fasteners ........................................................... 5-7
Cleaning ......................................................................... 9-1
Coolant ................................................................. 5-3, 8-30
Coolant temperature warning light ................................. 4-3DDifferential gear lock indicator (YFM70KPSG) ............... 4-5
Differential gear oil ............................................... 5-3, 8-28Drive lever (YFM70KDXG / YFM70KDHG /
YFM70KPXG / YFM70KPHG) .................................... 4-15
Drive select lever .......................................................... 4-18
Drive select lever and driving in reverse ........................ 6-2
Drive select lever safety system cable, adjusting ........ 8-43
EEngine break-in .............................................................. 6-4
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge .................................. 8-21
Engine stop switch ......................................................... 4-9
Engine trouble warning light .......................................... 4-4
EPS warning light (for EPS model) ................................. 4-4FFinal gear oil ......................................................... 5-3, 8-25
Four-wheel-drive indicator light (YFM70KDXG / YFM70KDHG) .............................................................. 4-5
Four-wheel-drive indicator (YFM70KPXG / YFM70KPHG / YFM70KPSG) ...................................... 4-5
Fuel ...................................................................... 4-19, 5-3
Fuel level warning light (YFM70KDXG / YFM70KDHG) .............................................................. 4-4
Fuel tank cap ............................................................... 4-18
Fuses, replacing ........................................................... 8-57HHandlebar switches ....................................................... 4-9
Headlight beam, adjusting ........................................... 8-62
Headlight bulb, replacing ............................................. 8-59
High-range indicator light (YFM70KPXG / YFM70KPHG / YFM70KPSG) ...................................... 4-3
UB1660E0.book Page 1 Thursday, February 26, 2015 4:01 PM
12-2
12
Horn switch .................................................................. 4-10IIdentification numbers ................................................. 11-1
Indicator lights and warning lights ................................. 4-2
Instruments, lights and switches ................................... 5-7LLabel locations ............................................................... 1-1
Light switch .................................................................. 4-10
Low-range indicator light (YFM70KPXG / YFM70KPHG / YFM70KPSG) ...................................... 4-3MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................ 8-5
Maintenance chart, emission control system ................ 8-3
Model label .................................................................. 11-1
Multi-function display (YFM70KPXG / YFM70KPHG / YFM70KPSG) .............................................................. 4-6NNeutral indicator light ..................................................... 4-3OOn-Command differential gear lock switch
(YFM70KPSG) ........................................................... 4-12
On-Command four-wheel-drive switch (YFM70KPSG) ........................................................... 4-11
Override switch (YFM70KPSG) .................................... 4-10
Owner’s manual and tool kit .......................................... 8-2PPanels, removing and installing ................................... 8-10
Park indicator light ......................................................... 4-3
Parking ........................................................................... 6-5
Parking on a slope ......................................................... 6-5 Part locations ................................................................. 3-1
RRear brake, adjusting the lever, pedal free play .......... 8-46
Rear knuckle pivots, lubricating .................................. 8-52
Reverse indicator light ................................................... 4-3
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-20
Shock absorber assemblies, adjusting the front and
rear (YFM70KPXG / YFM70KPHG / YFM70KPSG) ... 4-23
Spark arrester, cleaning ............................................... 8-40
Spark plug, checking ................................................... 8-18
Specifications .............................................................. 10-1
Speed limiter ................................................................ 4-16
Stabilizer bushes, checking .......... ............................... 8-52
Starting the engine ........................................................ 6-1
Start switch .................................................................. 4-10
Steering shaft, lubricating ............................................ 8-53
Storage .......................................................................... 9-2
Storage compartment .................................................. 4-21TTail/brake light bulb, replacing .................................... 8-63
Throttle lever ......................................................... 4-16, 5-4
Throttle lever free play, adjusting ................................ 8-42
Tires ............................................................................... 5-4
Trailer hitch (YFM70KPXG / YFM70KPHG / YFM70KPSG) ............................................................ 4-24
Troubleshooting ........................................................... 8-66
Troubleshooting charts ................................................ 8-67
UB1660E0.book Page 2 Thursday, February 26, 2015 4:01 PM