2008 YAMAHA GRIZZLY 660 differential

EBU17420
TABLE OF CONTENTS
SAFETY INFORMATION .............................. 1-1
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ............................ 2-1
DESCRIPTION .............................................. 3-1
Left 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 light ................ 4-2
Multifunction display ................................... 4-4
Handlebar switches .................................... 4-6
Throttle lever ............................................ 4-11
Speed limiter ............................................ 4-12
Front brake lever ...................................... 4-12
Brake pedal and rear brake lever ............. 4-13
Drive select lever ...................................... 4-14
Recoil starter ............................................ 4-14
Fuel tank cap ............................................ 4-14
Fuel .......................................................... 4-15Fuel cock ..................................................4-16
Starter (choke) ..........................................4-17
Seat ..........................................................4-18
Storage compartment ...............................4-19
Front carrier ..............................................4-20
Rear carrier ...............................................4-20
Adjusting the front and
rear shock absorber assemblies .............4-20
Auxiliary DC jack .......................................4-21
PRE-OPERATION CHECKS ..........................5-1
Pre-operation check list ..............................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 .................................5-4
Throttle lever ...............................................5-5
Tires ............................................................5-5
Measuring the tire pressure ........................5-6
Tire wear limit .............................................5-7
Chassis fasteners .......................................5-7
Instruments, lights and switches .................5-7U23D60E0.book Page 1 Thursday, March 15, 2007 7:59 PM

OPERATION .................................................. 6-1
Starting a cold engine ................................ 6-1
Starting a warm engine .............................. 6-3
Operating the drive select lever and
driving in reverse ...................................... 6-3
Engine break-in .......................................... 6-5
Parking ....................................................... 6-6
Parking on a slope ..................................... 6-6
Accessories and loading ............................ 6-6
RIDING YOUR ATV ...................................... 7-1
GETTING TO KNOW YOUR ATV............... 7-2
RIDE WITH CARE AND
GOOD JUDGEMENT ................................ 7-2
BE CAREFUL WHERE YOU RIDE ............. 7-9
TURNING YOUR ATV .............................. 7-13
CLIMBING UPHILL ................................... 7-14
RIDING DOWNHILL.................................. 7-17
CROSSING A SLOPE............................... 7-18
CROSSING THROUGH
SHALLOW WATER................................. 7-19
RIDING OVER ROUGH TERRAIN ........... 7-22
SLIDING AND SKIDDING ......................... 7-22
WHAT TO DO IF... .................................... 7-23
WHAT TO DO... ........................................ 7-23PERIODIC MAINTENANCE AND
MINOR REPAIR .............................................8-1
Owner’s manual and tool kit .......................8-1
Periodic maintenance chart for
the emission control system .....................8-3
General maintenance and
lubrication chart ........................................8-5
Removing and installing panels ..................8-9
Checking the spark plug ...........................8-16
Engine oil and oil filter cartridge ................8-18
Final gear oil .............................................8-22
Differential gear oil ....................................8-24
Coolant .....................................................8-26
Cleaning the air filter element ...................8-30
Cleaning the spark arrester ......................8-34
V-belt cooling duct check hose .................8-35
V-belt case drain plug ...............................8-35
Adjusting the carburetor ............................8-36
Adjusting the engine idling speed .............8-36
Adjusting the throttle cable free play .........8-37
Valve clearance ........................................8-38
Adjusting the drive select lever
safety system cable ................................8-38
Checking the front and rear brake pads ...8-38
Checking the brake fluid level ...................8-39
Changing the brake fluid ...........................8-41
Checking the front brake lever free play ...8-41U23D60E0.book Page 2 Thursday, March 15, 2007 7:59 PM

3-2
3
EBU17712Controls and instruments
NOTE:The ATV you have purchased may differ slightlyfrom the figures shown in this manual.
1. Drive select lever
2. Rear brake lever
3. Handlebar switches
4. Horn switch
5. Starter (choke)
6. Multifunction display
7. Main switch
8. On-Command four-wheel-drive/differential gear lock
switch
9. Throttle lever
10.Front brake lever
11.Auxiliary DC jackU23D60E0.book Page 2 Thursday, March 15, 2007 7:59 PM

4-2
4
EBU17813Indicator lights and warning light EBU17842Reverse indicator light “”
This indicator light comes on when the transmis-
sion is in the reverse position.Furthermore, this indicator light flashes when the
engine is being raced for 10 seconds or more.
NOTE:If the indicator light flashes under any other circum-
stances or the speedometer does not show the
speed while riding, have a Yamaha dealer checkthe speed sensor circuit.EBU17860Neutral indicator light “”
This indicator light comes on when the transmis-
sion is in the neutral position.EBU17920Coolant temperature warning light “”
This warning light comes on when the engine over-
heats. When this occurs during operation, stop the
engine as soon as it is safe to do so and allow it to
cool down for about 10 minutes.CAUTION:ECB00010
The engine may overheat if the ATV is over-
loaded. In this case, reduce the load to spec-
ification.
1. On-Command differential gear lock indicator light “DIFF.
LOCK”
2. Low-range indicator light “L”
3. High-range indicator light “H”
4. Neutral indicator light “N”
5. Reverse indicator light “R”
6. Park indicator light “P”
7. On-Command four-wheel-drive/differential gear lock
indicator “”/“”
8. Coolant temperature warning light “”U23D60E0.book Page 2 Thursday, March 15, 2007 7:59 PM

4-3
4

Start the engine after making sure that the
warning light is out. Continuous use while
the warning light is on may cause damage tothe engine.EBU17961On-Command four-wheel-drive/differential
gear lock indicator “”/“”
The On-Command four-wheel-drive indicator “”
comes on when the On-Command four-wheel-
drive switch is set to the “4WD” position.
The On-Command differential gear lock indicator
“” in the On-Command four-wheel-drive indica-
tor also comes on when the On-Command differ-
ential gear lock switch is set to the “LOCK”
position.NOTE:
Due to the synchronizing mechanism in the dif-
ferential gear case, the four-wheel-drive indica-
tor may not come on until the ATV starts moving.
When the On-Command differential gear lock
switch is set to “LOCK”, the indicator “” willflash until the differential gear is locked.
EBU17970Park indicator light “”
This indicator light comes on when the transmis-
sion is in the park position.EBU17980High-range indicator light “”
This indicator light comes on when the transmis-
sion is in the high-range position.EBU17990Low-range indicator light “”
This indicator light comes on when the transmis-
sion is in the low-range position.EBU18001On-Command differential gear lock indicator
light “DIFF. LOCK”
This indicator light and the On-Command differen-
tial gear lock indicator in the display come on when
the On-Command differential gear lock switch is
set to the “LOCK” position.NOTE:When the switch is set to “LOCK”, the On-Com-
mand differential gear lock indicator light will flashuntil the differential gear is locked.
U23D60E0.book Page 3 Thursday, March 15, 2007 7:59 PM

4-7
4
EBU18190Override switch “OVERRIDE”
Top speed is normally limited when operating in
differential gear lock. If conditions require more en-
gine power when riding forward, push and hold this
switch to override the differential gear lock speed
limiting function. (See page 4-9.) Releasing the
switch restores the speed limiting function.
While the override switch is pushed, the segments
of the speedometer digits will appear as shown in
the figure.
NOTE:If the digits of the speedometer appear as shown
when the switch is NOT being pushed, this could
indicate a malfunction in the electrical system. In
this case, take the ATV to a Yamaha dealer at thefirst opportunity.
WARNING
EWB00150Always ride at a slow speed when the ATV is in
four-wheel-drive differential gear lock, and al-
low extra time and distance for maneuvers.
All wheels turn at the same speed when the dif-
ferential is locked, so it takes more effort to
turn the ATV. The effort needed to turn increas-
1. Override switch “OVERRIDE”U23D60E0.book Page 7 Thursday, March 15, 2007 7:59 PM

4-9
4
EBU18252On-Command differential gear lock switch
“4WD”/“LOCK”
This ATV is equipped with a switch allowing you to
lock the differential gear when in four-wheel drive.
Select the appropriate switch position according to
the terrain and the conditions.
“4WD” (four-wheel drive): Power is supplied to
the rear and front wheels.
“LOCK” (four-wheel drive with the differential
gear locked): Power is supplied to the rear and
front wheels and the differential gear is locked.
Unlike in four-wheel drive, all wheels turn at the
same speed.To lock the differential gear in four-wheel drive,
make sure the On-Command four-wheel-drive
switch is pushed in to the “4WD” position.
Stop the ATV, move the differential gear lock lever
to position (a), and then push the differential gear
lock switch in to the “LOCK” position. When the dif-
ferential gear is locked, the differential gear lock in-
dicator “DIFF. LOCK” will come on along with the
indicator “” in the multifunction display.1. On-Command four-wheel-drive switch “2WD”/“4WD”
2. On-Command differential gear lock switch “4WD”/“LOCK”
1. Differential gear lock lever
2. On-Command four-wheel-drive switch “2WD”/“4WD”
U23D60E0.book Page 9 Thursday, March 15, 2007 7:59 PM

4-10
4
To release the differential gear lock, stop the ATV
and push the switch to the “4WD” position.
WARNING
EWB00130Always stop the ATV before changing from
four-wheel drive to four-wheel-drive differen-
tial gear lock or vice-versa.
The ATV handles differently in four-wheel drive
than in differential gear lock in some circum-
stances. Changing from four-wheel drive to dif-
ferential gear lock or vice-versa while moving
may cause the ATV to handle differently unex-pectedly. This could distract the operator and
increase the risk of losing control and causing
an accident.
WARNING
EWB00140Always ride at a slow speed when the ATV is in
differential gear lock, and allow extra time and
distance for maneuvers.
All wheels turn at the same speed when the dif-
ferential gear is locked, so it takes more effort
to turn the ATV. The effort needed to turn in-
creases with the riding speed. You may lose
control and have an accident if you cannot
make a sharp enough turn for the speed youare traveling.NOTE:
When the switch is set to “LOCK”, the differential
gear lock indicator and indicator light will flash
until the differential gear is locked.
When the indicator and indicator light are flash-
ing, turning the handlebar back and forth will
help the differential gear lock to engage.
1. On-Command differential gear lock switch “4WD”/“LOCK”U23D60E0.book Page 10 Thursday, March 15, 2007 7:59 PM