2002 YAMAHA YZF600 lock

PERIODIC MAINTENANCE AND MINOR REPAIR
6-19
6
EAU01335
Air intake duct Check that the screen of the intake
duct is not blocked. Clean the screen if
necessary.
EAU00630
Adjusting the carburetors The carburetors are important parts of
the engine and require very sophisti-
cated adjustment. Therefore, most car-
buretor adjustments should be left to a
Yamaha dealer, who has the neces-
sary professional knowledge and expe-
rience. The adjustment described in
the following section, however, may be
serviced by the owner as part of routine
maintenance.
EC000095
CAUTION:_ The carburetors have been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine. _
EAU00632
Adjusting the engine idling
speed The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
1. Start the engine and warm it up for
several minutes at 1,000–
2,000 r/min while occasionally rev-
ving it to 4,000–5,000 r/min.NOTE:_ The engine is warm when it quickly re-
sponds to the throttle. _
1. Air intake ductU4TVE6.book Page 19 Saturday, August 4, 2001 12:14 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
6
EAU00692
Adjusting the clutch lever free
play The clutch lever free play should mea-
sure 10–15 mm as shown. Periodically
check the clutch lever free play and, if
necessary, adjust it as follows.
1. Loosen the locknut at the clutch le-
ver.
2. To increase the clutch lever free
play, turn the adjusting bolt in di-
rection
a. To decrease the clutch
lever free play, turn the adjusting
bolt in direction
b.
3. Tighten the locknut.
NOTE:_ If the specified free play cannot be ob-
tained as described above or if the
clutch does not operate correctly, have
a Yamaha dealer check the internal
clutch mechanism. _
EAU00712
Adjusting the brake pedal
position The top of the brake pedal should be
positioned approximately 42 mm below
the top of the footrest as shown. Peri-
odically check the brake pedal position
and, if necessary, have a Yamaha
dealer adjust it.
1. Locknut
2. Clutch lever free play adjusting bolt
c. Clutch lever free play
a. Distance between brake pedal and footrest
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
6 Observe these precautions:


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


Use only the recommended quali-
ty brake fluid, otherwise the rubber
seals may deteriorate, causing
leakage and poor braking perfor-
mance.


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


Be careful that water does not en-
ter the brake fluid reservoir when
refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.


Brake fluid may deteriorate paint-
ed surfaces or plastic parts. Al-
ways clean up spilled fluid
immediately.


As the brake pads wear, it is nor-
mal for the brake fluid level to
gradually go down. However, if the
brake fluid level goes down sud-
denly, have a Yamaha dealer
check the cause.
EAU03976
Changing the brake fluid Have a Yamaha dealer change the
brake fluid at the intervals specified in
the NOTE after the periodic mainte-
nance and lubrication chart. In addition,
have the oil seals of the master cylin-
ders and calipers as well as the brake
hoses replaced at the intervals listed
below or whenever they are damaged
or leaking.

Oil seals: Replace every two
years.


Brake hoses: Replace every four
years.
1. Minimum level mark
Recommended brake fluid: DOT 4Rear
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-29
6
EAU00744
Drive chain slack The drive chain slack should be
checked before each ride and adjusted
if necessary.
To check the drive chain slack
1. Place the motorcycle on a level
surface and hold it in an upright
position.NOTE:_ When checking and adjusting the drive
chain slack, the motorcycle should be
positioned straight up and there should
be no weight on it. _
2. Shift the transmission into the neu-
tral position.
3. Move the rear wheel by pushing
the motorcycle to locate the tight-
est portion of the drive chain, and
then measure the drive chain
slack as shown.
4. If the drive chain slack is incorrect,
adjust it as follows.
EAU03752
To adjust the drive chain slack
1. Loosen the axle nut, then loosen
the locknut at each end of the
swingarm.
2. To tighten the drive chain, turn the
adjusting nut at each end of the
swingarm in direction
a. To loos-
en the drive chain, turn the adjust-
ing nut at each end of the
swingarm in direction
b, and then
push the rear wheel forward.
a. Drive chain slack
Drive chain slack:
20–30 mm
1. Axle nut
2. Alignment marks
3. Drive chain slack adjusting nut
4. Locknut
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
NOTE:_ Using the alignment marks on each
side of the swingarm, make sure that
both adjusting nuts are in the same po-
sition for proper wheel alignment. _
EC000096
CAUTION:_ Improper drive chain slack will over-
load the engine as well as other vital
parts of the motorcycle and can lead
to chain slippage or breakage. To
prevent this from occurring, keep
the drive chain slack within the
specified limits. _3. Tighten the locknuts, and then
tighten the axle nut to the specified
torque.
EAU03006
Lubricating the drive chain The drive chain must be cleaned and
lubricated at the intervals specified in
the periodic maintenance and lubrica-
tion chart, otherwise it will quickly wear
out, especially when riding in dusty or
wet areas. Service the drive chain as
follows.
EC000097
CAUTION:_ The drive chain must be lubricated
after washing the motorcycle or
riding in the rain. _1. Clean the drive chain with kero-
sene and a small soft brush.
ECA00053
CAUTION:_ To prevent damaging the O-rings,
do not clean the drive chain with
steam cleaners, high-pressure
washers or inappropriate solvents. _2. Wipe the drive chain dry.
3. Thoroughly lubricate the drive
chain with a special O-ring chain
lubricant.
ECA00052
CAUTION:_ Do not use engine oil or any other
lubricants for the drive chain, as
they may contain substances that
could damage the O-rings. _
Tightening torque:
Axle nut:
117 Nm (11.7 m·kgf)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-38
6
EW000119
WARNING
_ Headlight bulbs get very hot. There-
fore, keep flammable products away
from a lit headlight bulb, and do not
touch the bulb until it has cooled
down. _3. Place a new headlight bulb into
position, and then secure it with
the bulb holder.
EC000104
CAUTION:_ Take care not to damage the follow-
ing parts:

Headlight bulb
Do not touch the glass part of
the headlight bulb to keep it free
from oil, otherwise the transpar-
ency of the glass, the luminosi-
ty of the bulb, and the bulb life
will be adversely affected. Thor-
oughly clean off any dirt and fin-
gerprints on the headlight bulb
using a cloth moistened with al-
cohol or thinner.


Headlight lens
Do not affix any type of tinted
film or stickers to the head-
light lens.
Do not use a headlight bulb of
a wattage higher than speci-
fied.
_4. Install the headlight bulb cover,
and then connect the coupler.
5. Have a Yamaha dealer adjust the
headlight beam if necessary.
EAU01623
Replacing the tail/brake light
bulb 1. Remove the tail/brake light lens by
removing the screws.
2. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.
3. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
4. Install the lens by installing the
screws.
EC000108
CAUTION:_ Do not overtighten the screws, oth-
erwise the lens may break. _
1. Do not touch this area.
1. Screw (× 2)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-39
6
EAU03497
Replacing a turn signal light
bulb 1. Remove the turn signal light lens
by removing the screw.
2. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.
3. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
4. Install the lens by installing the
screw.
ECA00065
CAUTION:_ Do not overtighten the screw, other-
wise the lens may break. _
EAU01579
Supporting the motorcycle Since this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other mainte-
nance requiring the motorcycle to
stand upright. Check that the motor-
cycle is in a stable and level position
before starting any maintenance. A
strong wooden box can be placed un-
der the engine for added stability.
To service the front wheel
1. Stabilize the rear of the motorcycle
by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack un-
der the frame in front of the rear
wheel.
2. Raise the front wheel off the
ground by using a motorcycle
stand.To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor-
cycle stand is not available, by placing
a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
1. ScrewU4TVE6.book Page 39 Saturday, August 4, 2001 12:14 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-41
6
EAU04196
To install the front wheel
1. Install the speedometer gear unit
into the wheel hub so that the pro-
jections mesh with the slots.
2. Lift the wheel up between the fork
legs.NOTE:_ Make sure that the slot in the speedom-
eter gear unit fits over the retainer on
the fork leg. _3. Insert the wheel axle.
4. Lower the front wheel so that it is
on the ground.5. Install the brake calipers by install-
ing the bolts.
NOTE:_ Make sure that there is enough space
between the brake pads before install-
ing the brake calipers onto the brake
discs. _6. Tighten the wheel axle, then the
front wheel axle pinch bolt and the
brake caliper bolts to the specified
torques.
7. Install the brake hose holders by
installing the bolts.
8. Connect the speedometer cable.
9. Install the front fender by installing
the bolts.
10. Push down hard on the handlebar
several times to check for proper
fork operation.
EAU04197
Rear wheel To remove the rear wheel
EW000122
WARNING
_

It is advisable to have a Yamaha
dealer service the wheel.


Securely support the motor-
cycle so that there is no danger
of it falling over.
_
1. Speedometer gear unit
2. Slot
3. Speedometer gear unit retainer
Tightening torques:
Wheel axle:
65 Nm (6.5 m·kgf)
Front wheel axle pinch bolt:
20 Nm (2.0 m·kgf)
Brake caliper bolt:
40 Nm (4.0 m·kgf)
1. Axle nut
2. Left wheel axle guide
3. Locknut
4. Drive chain slack adjusting nut
5. Wheel axle
U4TVE6.book Page 41 Saturday, August 4, 2001 12:14 PM