tires YAMAHA YFM660R 2003 Owners Manual

EBU00015
1-CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ...................... 1-1
SAFETY INFORMATION ......................... 2-1
DESCRIPTION AND MACHINE
IDENTIFICATION ................................... 3-1
Identification number records .............. 3-3
Key identification number .................... 3-5
Vehicle identification number .............. 3-5
Model label ........................................... 3-7
CONTROL FUNCTIONS ........................ 4-1
Main switch........................................... 4-1
Indicator and warning lights ................. 4-3
Handlebar switches ........................... 4-11
Throttle lever ..................................... 4-15
Speed limiter ...................................... 4-17
Clutch lever ....................................... 4-19
Brake lever ......................................... 4-19
Brake pedal ........................................ 4-21
Parking brake .................................... 4-23
Shift pedal ......................................... 4-27
Reverse knob ..................................... 4-27
1234
Fuel tank cap .................................... 4-29
Fuel cock ........................................... 4-29
Starter (choke) ................................... 4-31
Seat.................................................... 4-33
Front shock absorber adjustment ...... 4-35
Rear shock absorber adjustment ....... 4-37
PRE-OPERATION CHECKS .................. 5-1
Front and rear brakes .......................... 5-5
Fuel ...................................................... 5-9
Engine oil ........................................... 5-13
Coolant............................................... 5-17
Chain ................................................. 5-19
Throttle lever ...................................... 5-21
Fittings and fasteners......................... 5-21
Lights ................................................. 5-21
Switches............................................. 5-21
Tires .................................................. 5-23
How to measure tire pressure ........... 5-27
Tire wear limit .................................... 5-29
5
U5LP62.book Page 1 Wednesday, May 8, 2002 11:24 AM

1-5
5 For Europe
5 For Oceania6
5LP-21696-M0
27.5 kPa0.275 kgf/cm
2
4.0 psi 27.5 kPa
0.275 kgf/cm
2
4.0 psiGBDEF
INLPS
Set with tires cold.
Pneus à froid. Bei kalten Reifen.
Ajuste con los
neumáticos an frío.Impostare a pneumatici
freddi.
Ställ in med kalla däck. Wanneer de banden
koud zijn.
Regular com pneus
frios.
U5LP62.book Page 5 Wednesday, May 8, 2002 11:24 AM

1-11
5 Pour l’Europe
5 Pour l’Océanie6
5LP-21696-M0
27.5 kPa0.275 kgf/cm
2
4.0 psi 27.5 kPa
0.275 kgf/cm
2
4.0 psiGBDEF
INLPS
Set with tires cold.
Pneus à froid. Bei kalten Reifen.
Ajuste con los
neumáticos an frío.Impostare a pneumatici
freddi.
Ställ in med kalla däck. Wanneer de banden
koud zijn.
Regular com pneus
frios.
U5LP62.book Page 11 Wednesday, May 8, 2002 11:24 AM

1-17
5 Para Europa
5 Para Oceanía6
5LP-21696-M0
27.5 kPa0.275 kgf/cm
2
4.0 psi 27.5 kPa
0.275 kgf/cm
2
4.0 psiGBDEF
INLPS
Set with tires cold.
Pneus à froid. Bei kalten Reifen.
Ajuste con los
neumáticos an frío.Impostare a pneumatici
freddi.
Ställ in med kalla däck. Wanneer de banden
koud zijn.
Regular com pneus
frios.
U5LP62.book Page 17 Wednesday, May 8, 2002 11:24 AM

2-13

Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such
as ice, go slowly and be very cautious in order
to reduce the chance of skidding or sliding out
of control.


Never operate an ATV in fast flowing water or
in water deeper than that recommended in this
manual. Remember that wet brakes may have
reduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.


Always be sure there are no obstacles or peo-
ple behind you when you operate in reverse.
When it is safe to proceed in reverse, go slowly.


Always use the size and type tires specified in
this manual.


Always maintain proper tire pressure as de-
scribed in this manual.
U5LP62.book Page 13 Wednesday, May 8, 2002 11:24 AM

5-1
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Front brakeCheck operation, free play, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5–5-7,
8-61–8-69
Rear brakeCheck operation, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5–5-7,
8-61–8-67, 8-71
ClutchCheck operation, condition and lever free play. 8-79
Parking brakeCheck operation, condition and cable length. 8-73–8-75
FuelCheck fuel level.
Fill with fuel if necessary.5-9–5-11
Engine oilCheck oil level.
Fill with oil if necessary.5-13–5-15,
8-17–8-31
Coolant reservoirCheck coolant level.
Fill with coolant if necessary.5-17–5-19,
8-33–8-41
Drive chainCheck chain slack and condition.
Adjust if necessary.5-19, 8-81–8-87
ThrottleCheck for proper throttle cable operation and free play. 5-21, 8-57
Wheels and tiresCheck tire pressure, wear and damage.5-23–5-29,
8-97–8-99
Fittings and fastenersCheck all fittings and fasteners. 5-21
Lights and switchesCheck for proper operation.5-21, 8-77,
8-109–8-119
U5LP62.book Page 1 Wednesday, May 8, 2002 11:24 AM

5-23
EBU00158
Tires
Always use the recommended tires.
WARNING
Use of improper tires on this ATV, or operation
of this ATV with improper or uneven tire pres-
sure, may cause loss of control, increasing
your risk of accident.
Pay attention to the following.
1. The tires listed below have been approved
by Yamaha Motor Co., Ltd. for this model.
Other tire combinations are not recom-
mended.
Manufacturer Size Type
Front DUNLOP AT21
× 7-10 KT331
Rear DUNLOP AT20
× 10-9 KT335
U5LP62.book Page 23 Wednesday, May 8, 2002 11:24 AM

5-25
2. The tires should be set to the recommend-
ed pressure:

Recommended tire pressure
Front 27.5 kPa (0.275 kgf/cm
2, 0.275 bar)
Rear 27.5 kPa (0.275 kgf/cm2, 0.275 bar)


Check and adjust tire pressures when the
tires are cold.


Tire pressures must be equal on both
sides.
3. Tire pressure below the minimum speci-
fied could cause the tire to dislodge from
the rim under severe riding conditions.
The following are minimums:
Front 24.5 kPa (0.245 kgf/cm
2, 0.245 bar)
Rear 24.5 kPa (0.245 kgf/cm2, 0.245 bar)
4. Use no more than the following pressures
when seating the tire beads.
Front 250 kPa (2.5 kgf/cm
2, 2.5 bar)
Rear 250 kPa (2.5 kgf/cm2, 2.5 bar)
Higher pressures may cause the tire to
burst. Inflate the tires very slowly and
carefully. Fast inflation could cause the
tire to burst.
U5LP62.book Page 25 Wednesday, May 8, 2002 11:24 AM

5-27 1. Low-pressure tire gauge
1. Manomètre basse pression pour pneus
1. Manómetro de baja presión
EBU00159
How to measure tire pressure
Use the low-pressure tire gauge.NOTE:The low-pressure tire gauge is included as stan-
dard equipment. Make two measurements of the
tire pressure and use the second reading. Dust or
dirt in the gauge could cause the first reading to be
incorrect.Set pressure with tires cold.
Set tire pressures to the following specifications:
Recommended
pressureMinimum Maximum
Front27.5 kPa
(0.275 kgf/cm
2,
0.275 bar)24.5 kPa
(0.245 kgf/cm
2,
0.245 bar)30.5 kPa
(0.305 kgf/cm
2,
0.305 bar)
Rear27.5 kPa
(0.275 kgf/cm
2,
0.275 bar)24.5 kPa
(0.245 kgf/cm
2,
0.245 bar)30.5 kPa
(0.305 kgf/cm
2,
0.305 bar)
U5LP62.book Page 27 Wednesday, May 8, 2002 11:24 AM

6-21
EBU00208
To decelerate:
When slowing down or stopping, release the throt-
tle and apply the brakes smoothly and evenly. As
you slow down, shift to a lower gear. Be sure that
the engine has sufficiently slowed before engaging
a lower gear. Improper use of the brakes or shift-
ing can cause the tires to lose traction, reducing
control and increasing the possibility of an acci-
dent.
WARNING
Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a low-
er gear when the engine speed is too high
could make the wheels stop rotating. This
could cause loss of control, an accident and
injury. It could also cause engine or drive train
damage.
U5LP62.book Page 21 Wednesday, May 8, 2002 11:24 AM