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.
0–160 km (0–100 mi) or 0–10 hours
Avoid prolonged operation above 1/2 throttle.
Vary the speed of the ATV regularly. Do not oper-
ate it at one set throttle position.
160–320 km (100–200 mi) or 10–20 hours
Avoid prolonged operation above 3/4 throttle. Rev
the engine freely, but do not use full throttle at any
time.
320 km (200 mi) or 20 hours and beyond
The ATV can now be operated normally.
U2UD61E0.book Page 4 Monday, April 25, 2016 10:55 AM
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
U2UD61E0.book Page 19 Monday, April 25, 2016 10:55 AM
12-1
12
INDEX
AAccessories and loading ................................................ 6-5
Accessories, auxiliary jack ........................................... 4-24
Air filter element, cleaning ............................................ 8-38
Axle boots .................................................................... 8-49BBattery .......................................................................... 8-53
Brake fluid, changing ...................................................8-46
Brake fluid level, checking ........................................... 8-44
Brake lever, front .......................................................... 4-15
Brake levers, checking and lubricating ........................ 8-50
Brake pads, checking the front and rear ..................... 8-43
Brake pedal and rear brake lever ................................. 4-15
Brake pedal, checking and lubricating ........................ 8-51
Brake pedal free play, adjusting .................................. 8-47
Brakes .......................................................................... 8-43
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................. 8-49
Carrier, front ................................................................. 4-23
Carrier, rear .................................................................. 4-23
Chassis fasteners ........................................................... 5-6
Cleaning ......................................................................... 9-1
Coolant ................................................................. 5-3, 8-30
Coolant temperature warning light ................................. 4-3DDifferential gear oil ............................................... 5-3, 8-28
Drive select lever .......................................................... 4-16
Drive select lever and driving in reverse ........................ 6-2
EEngine break-in .............................................................. 6-4
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge .................................. 8-21
Engine stop switch ......................................................... 4-8
Engine trouble warning light .......................................... 4-3
EPS warning light ........................................................... 4-3FFinal gear oil ......................................................... 5-3, 8-25
Four-wheel-drive/differential gear lock indicator ........... 4-4
Front and rear brake lever free play, checking ............ 8-46
Fuel ...................................................................... 4-16, 5-3
Fuel tank cap ............................................................... 4-16
Fuses, replacing ........................................................... 8-57HHandlebar switches ....................................................... 4-8
Headlight beam, adjusting ........................................... 8-61
Headlight bulb, replacing ............................................. 8-59
High-range indicator light .............................................. 4-2
Horn switch .................................................................... 4-9IIdentification numbers ................................................. 11-1
Indicator lights and warning lights ................................. 4-2
Instruments, lights and switches ................................... 5-7LLabel locations ............................................................... 1-1
Light switch .................................................................... 4-8
Low-range indicator light ............................................... 4-2
U2UD61E0.book Page 1 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