2003 YAMAHA YFM660R lock

7-17 1. Locknut 2. Adjusting screw
1. Contre-écrou 2. Vis de réglage
1. Contratuerca 2. Tornillo de ajuste
Speed limiter
For riders inexperienced with this model, this mod-
el is equipped with a speed limiter in the throttle le-
ver housing. The speed limiter limits the power
and top speed of the ATV. Turning the adjusting
screw in decreases the top speed, and turning it
out increases the top speed. (See page 4-17 for
details.)
Loading and accessories
Use extra caution when riding the ATV with addi-
tional loads, such as accessories or cargo. The
ATV’s handling may be adversely affected. Re-
duce your speed when adding additional loads.
U5LP62.book Page 17 Wednesday, May 8, 2002 11:24 AM

7-53
WARNING
_ Use proper gear and maintain steady speed
when climbing a hill.
If you lose all forward speed:

Keep weight uphill.


Apply the brakes.


Lock the parking brake, after you are
stopped.
If you begin rolling backwards:


Keep weight uphill.


Never apply the rear brake while rolling
backwards. Apply the front brake. When
fully stopped, apply the rear brake as well,
and then lock the parking brake.
Dismount on uphill side or to a side if pointed
straight uphill. Turn the ATV around and re-
mount, following the procedure described in
the Owner’s Manual.
_
U5LP62.book Page 53 Wednesday, May 8, 2002 11:24 AM

8-49 1. Unlock. 2. Element retaining plate
1. Déverrouiller. 2. Plaquette de retenue d’élément
1. Levántelo. 2. Placa de retención del elemento
1. Frame 2. Air filter element
3. Element retaining plate
1. Armature 2.Élément du filtre à air
3. Plaquette de retenue d’élément
1. Bastidor 2. Elemento del filtro de aire
3. Placa de retención del elemento
6. Squeeze the excess solvent out of the air fil-
ter element and let it dry.CAUTION:_ Do not twist the air filter element when squeez-
ing it. _7. Inspect the air filter element and replace it if
damaged.
8. Apply foam air filter oil to the air filter element.
If foam air filter oil is not available, engine oil
may be used.NOTE:_ The air filter element should be wet but not drip-
ping. _9. Pull the air filter element over its frame.
10. Install the air filter element.
U5LP62.book Page 49 Wednesday, May 8, 2002 11:24 AM

8-57 1. Locknut 2. Adjusting bolt
a. Throttle lever free play
1. Contre-écrou 2. Boulon de réglage
a. Jeu du levier d’accélération
1. Contratuerca 2. Perno de ajuste
a. Juego libre de la palanca del acelerador
EBU00307
Throttle lever adjustmentNOTE:Adjust the engine idling speed before adjusting the
throttle lever free play.1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle lever
free play is 3–5 mm.
3. Tighten the locknut.
U5LP62.book Page 57 Wednesday, May 8, 2002 11:24 AM

8-65 1. Brake fluid reservoir cover
2. Bolt (× 2)
1. Cache du réservoir de liquide de frein
2. Boulon (× 2)
1. Cubierta del depósito de líquido de frenos
2. Perno (× 2)
Rear
Arrière
Trasero
NOTE:_ To access the rear brake fluid reservoir, remove
the reservoir cover by removing the bolts. _Observe these precautions:

When checking the brake fluid level, make sure
the top of the brake fluid reservoir is level.


Use only the designated quality brake fluid, oth-
erwise, the rubber seals may deteriorate, caus-
ing leakage and poor brake performance.


Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reaction
and lead to poor brake performance.


Be careful that water does not enter the brake
fluid reservoir when refilling. Water will signifi-
cantly lower the boiling point of the fluid and
may result in vapor lock. Recommended brake fluid: DOT 4
U5LP62.book Page 65 Wednesday, May 8, 2002 11:24 AM

8-73 1. Locknut 2. Adjusting bolt
A. Cable length
1. Contre-écrou 2. Boulon de réglage
A. Longueur de câble
1. Contratuerca 2. Perno de ajuste
A. Longitud del cable
1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
EBU01192
Parking brake adjustment
Parking brake adjustment may be required if the
parking brake does not hold properly. The cable
length
A should be adjusted to 64–68 mm.
1. Fully loosen the locknut and the adjusting bolt
at the clutch lever.
2. Loosen the locknut and the adjusting bolt at
the rear brake caliper.
3. Turn the adjusting bolt at the clutch lever in
direction
a to increase the cable length or in
direction
b to decrease the cable length.NOTE:_ If the cable cannot be adjusted to specification,
consult a Yamaha dealer. _4. Tighten the locknut at the clutch lever.
U5LP62.book Page 73 Wednesday, May 8, 2002 11:24 AM

8-75
5. Screw in the adjusting bolt at the rear brake
caliper by hand until it feels tight, then screw it
out 1/8 turn. Tighten the locknut to the speci-
fied torque.CAUTION:_ When tightening the locknut, hold the adjust-
ing bolt with a wrench so that the adjusting
bolt does not turn together with the locknut. _
WARNING
_ Operating with improperly adjusted brakes
could cause the brakes to malfunction, result-
ing in reduced braking performance. This
could increase the chance of a collision or ac-
cident. After adjusting the parking brake, block
the rear of the machine off the ground and spin
the rear wheels. Check to make sure there is
no brake drag. If brake drag is noticed, perform
the adjustment again. _
Tightening torque:
Locknut:
16 Nm (1.6 m·kgf)
U5LP62.book Page 75 Wednesday, May 8, 2002 11:24 AM

8-79 1. Locknut 2. Adjusting bolt
c. Clutch lever free play
1. Contre-écrou 2. Boulon de réglage
c. Jeu du levier d’embrayage
1. Contratuerca 2. Perno de ajuste
c. Juego libre de la palanca del embrague
1. Locknut 2. Adjusting nut
1. Contre-écrou 2.Écrou de réglage
1. Contratuerca 2. Tuerca de ajuste
EBU00741
Clutch lever free play adjustment
The clutch lever free play should be adjusted to
5–10 mm.
1. Loosen the locknut at the clutch lever.
2. Turn the adjusting bolt at the clutch lever in
direction
a to increase the free play or in di-
rection
b to decrease the free play.
3. Tighten the locknut at the clutch lever.NOTE:If the specified free play cannot be obtained, pro-
ceed with the following steps.4. Loosen the locknut at the clutch lever.
5. Turn the adjusting bolt at the clutch lever in
direction
a to loosen the cable.
6. Loosen the locknut at the crankcase side.
7. Turn the adjusting nut at the crankcase in di-
rection
a to increase the free play or in direc-
tion
b to decrease the free play.
8. Tighten the locknut at the crankcase and the
clutch lever.
U5LP62.book Page 79 Wednesday, May 8, 2002 11:24 AM