
8-64
8
EBU27695Troubleshooting chartsStarting problems or poor engine performance
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
The engine does not start.
Have a Yamaha dealer check the ATV.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug. Have a Yamaha dealer check the ATV.
The engine does not start.
Check the compression.
DryWet
Operate the electric starter.
Have a Yamaha dealer check the ATV.
The engine does not start.
Check the ignition.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
U2UD61E0.book Page 64 Monday, April 25, 2016 10:55 AM

9-1
9
EBU25861
CLEANING AND STORAGE
EBU25882CleaningFrequent, thorough cleaning of your ATV will not
only enhance its appearance but will improve its
general performance and extend the useful life of
many components.1. Before cleaning the ATV: a. Block off the end of the exhaust pipe toprevent water entry. A plastic bag and
strong rubber band may be used.
b. Make sure the spark plug and all filler caps are properly installed.
2. If the engine case is excessively greasy, apply degreaser with a paint brush. Do not apply
degreaser to the wheel axles.
3. Rinse the dirt and degreaser off with a garden hose. Use only enough pressure to do the
job. WARNING! Wet brakes may have re-
duced stopping ability, increasing the
chance of an accident. Test the brakes af-
ter washing. Apply the brakes several
times at slow speeds to let friction dry out
the linings.
[EWB02312]
NOTICE: Excessive wa-
ter pressure may cause water seepage and deterioration of wheel bearings,
brakes, transmission seals and electrical
devices. Many expensive repair bills have
resulted from improper high-pressure de-
tergent applications such as those avail-
able in coin-operated car washers.
[ECB00712]
4. Once most of the dirt has been hosed off,
wash all surfaces with warm water and mild,
detergent-type soap. An old toothbrush or
bottle brush is handy for hard-to-reach pla-
ces.
5. Rinse the ATV off immediately with clean wa- ter and dry all surfaces with a chamois, clean
towel or soft absorbing cloth.
6. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy.
7. Automotive type wax may be applied to all painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
abrasives which may mar the paint or protec-
tive finish. When finished cleaning, start the
engine and let it idle for several minutes.
U2UD61E0.book Page 1 Monday, April 25, 2016 10:55 AM

9-2
9
EBU27262StorageShort-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.
[ECB00722]
Long-term
Before storing your ATV for several months: 1. Follow all the instructions in the “Cleaning” section of this chapter.
2. Fill up the fuel tank and add fuel stabilizer (if available) to prevent the fuel from deteriorat-
ing. 3. 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.
4. Lubricate all control cables and the pivoting points of all levers and pedals.
5. 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. Alterna-
tively, turn the wheels a little every month in
order to prevent the tires from becoming de-
graded in one spot.
Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)U2UD61E0.book Page 2 Monday, April 25, 2016 10:55 AM

10-3
10
Fuel injection:Throttle body:ID mark:B161 00Spark plug (s):Manufacturer/model:
NGK/CPR7EA-9
Spark plug gap: 0.8–0.9 mm (0.031–0.035 in)Clutch:Clutch type:
Wet, centrifugal automaticTransmission:Secondary reduction system:Shaft drive
Secondary reduction ratio:
43/21 × 24/18 × 33/9 (10.011)
Transmission type: V-belt automatic
Operation: Left hand operation
Reverse gear:
23/14 × 28/23 (2.000)
Low range: 31/16 (1.938)
High range: 27/25 (1.080)Chassis:Frame type:Steel tube frame Caster angle:
4.53 °
Trail: 26.0 mm (1.02 in)
Front tire:Type:Tubeless
Size: AT26 x 8-12
Manufacturer/model:
MAXXIS/MU05YRear tire:Type:Tubeless
Size:
AT26 x 10-12
Manufacturer/model: MAXXIS/MU06YLoading:Maximum loading limit:
240.0 kg (530 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:Front:
35.0 kPa (0.350 kgf/cm², 5.0 psi)
Rear: 30.0 kPa (0.300 kgf/cm², 4.4 psi)
Minimum: Front:32.0 kPa (0.320 kgf/cm², 4.6 psi)
U2UD61E0.book Page 3 Monday, April 25, 2016 10:55 AM

12-2
12
MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................ 8-5
Maintenance chart, emission control system ................ 8-3
Model label .................................................................. 11-1
Multi-function display .................................................... 4-5NNeutral indicator light ..................................................... 4-2OOn-Command differential gear lock switch ................. 4-11
On-Command four-wheel-drive switch ....................... 4-10
Override switch .............................................................. 4-9
Owner’s manual and tool kit .......................................... 8-2PPanels, removing and installing ................................... 8-10
Park indicator light ......................................................... 4-2
Parking ........................................................................... 6-5
Parking on a slope ......................................................... 6-5
Part locations ................................................................. 3-1RRear knuckle pivots, lubricating .................................. 8-52
Reverse indicator light ................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-18
Shock absorber assemblies, adjusting the front and rear ............................................................................ 4-23
Spark arrester, cleaning ............................................... 8-40
Spark plug, checking ................................................... 8-18
Specifications .............................................................. 10-1 Speed limiter ................................................................ 4-14
Stabilizer bushes, checking ..........
............................... 8-51
Starting the engine ........................................................ 6-1
Start switch .................................................................... 4-8
Steering shaft, lubricating ............................................ 8-52
Storage .......................................................................... 9-2
Storage compartments ................................................ 4-19
TTail/brake light ............................................................. 8-61
Throttle lever ......................................................... 4-13, 5-4
Throttle lever free play, adjusting ................................ 8-42
Tires ............................................................................... 5-4
Trailer hitch (YFM70GPSH / YFM70GPLH) ................. 4-24
Troubleshooting ........................................................... 8-63
Troubleshooting charts ................................................ 8-64VValve clearance ............................................................ 8-43
V-belt case drain plug .................................................. 8-42
Vehicle identification number ...................................... 11-1WWheel hub bearings, checking .................................... 8-51
Wheel, installing ........................................................... 8-62
Wheel, removing .......................................................... 8-61
U2UD61E0.book Page 2 Monday, April 25, 2016 10:55 AM