maintenance YAMAHA YZF-R6 2000 Owner's Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
6-18
6 8. Remove the screws holding the air
filter case cover.9. Remove the air filter element.10. Check the air filter element’s con-
dition. If it is damaged or exces-
sively dusty, it should be replaced.
1. Screw (´ 6)
1. Air filter element
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-19
6
EC000082*
CAUTION:@ l
Make sure the air filter element
is properly seated in the air filter
case.
l
The engine should never be run
without the air filter installed.
Excessive piston and/or cylin-
der wear may result.
@11. Reverse the removal procedure
for installation.
EW000131
WARNING
@ Make sure that the fuel hoses and
vacuum hose are properly connect-
ed, in place and not pinched. If a
hose is damaged, be sure to replace
it. @
EAU01335
Air intake ductCheck that the screen of the intake
duct is not blocked. Clean the screen if
necessary.1. Air intake duct
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
6
EAU00630
Carburetor adjustmentThe carburetors are important parts of
the engine and require very sophisti-
cated adjustment. Most adjustments
should be left to a Yamaha dealer who
has the professional knowledge and
experience to do so. However, the idle
speed may be adjusted by the owner
as part of routine maintenance.
EC000095
CAUTION:@ The carburetors were set at the
Yamaha factory after many tests. If
they are changed, poor engine per-
formance and damage may result. @
EAU00632
Idle speed adjustment1. Start the engine and warm it up for
a few minutes at approximately
1,000 to 2,000 r/min. Occasionally
rev the engine to 4,000 to
5,000 r/min. The engine is warm
when it quickly responds to the
throttle.
2. Set the idle to the specified engine
speed by adjusting the throttle
stop screw. Turn the screw in di-
rection
a to increase engine
speed and in direction
b to de-
crease engine speed.
NOTE:@ If the specified idle speed cannot be
obtained by performing the above ad-
justment, consult a Yamaha dealer. @
1. Throttle stop screw
Standard idle speed:
1,250 ~ 1,350 r/min
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-21
6
EAU00635
Throttle cable free play
inspectionThere should be a free play of 6 ~
8 mm at the throttle grip. If the free play
is incorrect, ask a Yamaha dealer to
make this adjustment.
EAU00637
Valve clearance adjustmentThe correct valve clearance changes
with use, resulting in improper fuel/air
supply or engine noise. To prevent this,
the valve clearance must be adjusted
regularly. This adjustment however,
should be left to a professional
Yamaha service technician.
EAU00658
TiresTo ensure maximum performance,
long service and safe operation, note
the following:
Tire air pressure
Always check and adjust the tire pres-
sure before operating the motorcycle.
EW000082
WARNING
@ Tire inflation pressure should be
checked and adjusted when the
temperature of the tire equals the
ambient air temperature. Tire infla-
tion pressure must be adjusted ac-
cording to total weight of cargo,
rider, passenger, and accessories
(fairing, saddlebags, etc. if approved
for this model), and vehicle speed. @
a. Free playE_5eb_Periodic.fm Page 21 Thursday, November 18, 1999 4:06 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6
CE-33EEW000083
WARNING
@ Proper loading of your motorcycle
is important for several characteris-
tics of your motorcycle, such as
handling, braking, performance and
safety. Do not carry loosely packed
items that can shift. Securely pack
your heaviest items close to the
center of the motorcycle, and dis-
tribute the weight evenly from side
to side. Properly adjust the suspen-
sion for your load, and check the
condition and pressure of your tires.
NEVER OVERLOAD YOUR MOTOR-
CYCLE. Make sure the total weight
of the cargo, rider, passenger, and
accessories (fairing, saddlebags,
etc. if approved for this model) does
not exceed the maximum load of the
motorcycle. Operation of an over-
loaded motorcycle could cause tire
damage, an accident, or even injury. @
Tire inspection
Always check the tires before operating
the motorcycle. If center tread depth
reaches the limit as shown, if the tire
has a nail or glass fragments in it, or if
the side wall is cracked, contact a
Yamaha dealer immediately and have
the tire replaced.
Maximum load* 187 kg
Cold tire pressure Front Rear
Up to 90 kg load*250 kPa
(2.50 kg/cm
2,
2.50 bar)250 kPa
(2.50 kg/cm
2,
2.50 bar)
90 kg Maximum load*250 kPa
(2.50 kg/cm
2,
2.50 bar)290 kPa
(2.90 kg/cm
2,
2.90 bar)
High speed riding250 kPa
(2.50 kg/cm
2,
2.50 bar)250 kPa
(2.50 kg/cm
2,
2.50 bar)
* Load is the total weight of cargo, rider, passenger
and accessories.
1. Tread depth
2. Side wall
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-23
6
EW000095
WARNING
@ Operating the motorcycle with ex-
cessively worn tires decrease riding
stability and can lead to loss of con-
trol. Have excessively worn tires re-
placed by a Yamaha dealer
immediately. Brakes, tires, and relat-
ed wheel parts replacement should
be left to a Yamaha Service Techni-
cian. @CE-26ENOTE:@ These limits may be different by regula-
tion from country to country. If so, con-
form to the limits specified by the
regulations of your own country. @Tire information
This motorcycle is equipped with tube-
less tires, tire valves and cast wheels.
EW000080
WARNING
@ l
After extensive tests, the tires
mentioned below have been ap-
proved by Yamaha Motor Co.,
Ltd. for this model. No guaran-
tee for handling characteristics
can be given if tire combina-
tions other than what is ap-
proved are used on this
motorcycle. The front and rear
tires should be of the same
manufacture and design.
l
The use of tire valves and valve
cores other than listed below
could cause tire deflation dur-
ing extreme high speed riding.
Always use genuine parts or
their equivalent for replace-
ment.
l
Be sure to install the valve caps
securely, as these are important
to prevent air pressure leakage
during extreme high speed
riding.
@
CE-10E
CE-12E
Minimum tire tread depth
(front and rear)1.6 mm
1. Tire valve
2. Valve core
3. Valve cap with sealFRONT
Manufacturer Size Type
Bridgestone 120/60 ZR17 (55W) BT56FE
Dunlop 120/60 ZR17 (55W) D207FJ
REAR
Manufacturer Size Type
Bridgestone 180/55 ZR17 (73W) BT56RE
Dunlop 180/55 ZR17 (73W) D207N
Type
Tire valve TR412
Valve core #9000A (original)
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PERIODIC MAINTENANCE AND MINOR REPAIR
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6
EAU00684
WARNING
@ This motorcycle is fitted with super
high-speed running tires. The fol-
lowing points must be observed in
order for you to make fully effective
use of these tires.l
Never fail to use the specified
tires in tire replacement. Other
tires may have a danger of
bursting at super high-speeds.
l
New tires have a relatively low
grip on the road surface until
they have been slightly worn.
Therefore, approximately
100 km should be traveled at
normal speed before any high-
speed riding is done.
l
Before any high-speed runs, the
tires should be warmed-up suf-
ficiently.
l
Always inflate to the correct tire
pressure according to the oper-
ating conditions.
@
EAU00687
WheelsTo ensure maximum performance,
long service, and safe operation, note
the following:l
Always inspect the wheels before
a ride. Check for cracks, bends, or
warpage of the wheels. If any ab-
normal condition exists in a wheel,
consult a Yamaha dealer. Do not
attempt even small repairs to the
wheel. If a wheel is deformed or
cracked, it must be replaced.
l
Tires and wheels should be bal-
anced whenever either one is
changed or replaced. Failure to
have a wheel balanced can result
in poor performance, adverse han-
dling characteristics, and short-
ened tire life.
l
Ride at moderate speeds after
changing a tire since the tire sur-
face must first be broken in for it to
develop its optimal characteristics.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
6
EAU01356
Clutch lever free play
adjustmentThe clutch lever free play should be ad-
justed to 10 ~ 15 mm.
1. Turn the adjusting bolt at the
clutch lever in direction
a to in-
crease free play or in direction
b
to decrease free play. If the speci-
fied free play cannot be obtained,
proceed with the following steps.
2. Turn the adjusting bolt at the
clutch lever in direction
a to loos-
en the cable.3. Remove cowling A. (See page 6-6
for removal and installation proce-
dures.)
4. Loosen the locknut at the crank-
case side.
5. Turn the adjusting nut at the
crankcase in direction
a to in-
crease free play or in direction
b
to decrease free play. Then tight-
en the locknut.
6. Install the cowling.
EAU00713
Brake light switch adjustmentThe rear brake light switch is activated
by the brake pedal and is properly ad-
justed when the brake light comes on
just before braking takes effect. To ad-
just the rear brake light switch, hold the
switch body so it does not rotate while
turning the adjusting nut.
Turn the adjusting nut in direction
a to
make the brake light come on earlier.
Turn the adjusting nut in direction
b to
make the brake light come on later.
1. Adjusting bolt
2. Free play
1. Locknut
2. Adjusting nut
1. Brake light switch
2. Adjusting nut
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PERIODIC MAINTENANCE AND MINOR REPAIR
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6
EAU00721
Checking the front and rear
brake pads
EAU00725
Front brake
A wear indicator groove is provided on
each brake pad. This indicator allows
checking of brake pad wear without
disassembling the brake. Inspect the
groove. If the groove has almost disap-
peared, ask a Yamaha dealer to re-
place the pads.
EAU01641
Rear brake
A wear indicator groove is provided on
each brake pad. This indicator allows
checking of brake pad wear without
disassembling the brake. Remove the
rear caliper bolt and tilt the caliper for-
ward. Inspect the groove. If the groove has
almost disappeared, ask a Yamaha
dealer to replace the pads. Install the
caliper and caliper bolt, then tighten the
bolt to the specified torque.
1. Wear indicator groove
1. Caliper bolt
1. Wear indicator grooveTightening torque:
Caliper bolt:
40 Nm (4.0 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
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6
EAU00731
Inspecting the brake fluid
levelInsufficient brake fluid may let air enter
the brake system, possibly causing the
brakes to become ineffective.
Before riding, check that the brake fluid
is above the minimum level and replen-
ish when necessary.
Observe these precautions:l
When checking the fluid level,
make sure the top of the master
cylinder is level by turning the han-
dlebars.
l
Use only the designated quality
brake fluid. Otherwise, the rubber
seals may deteriorate, causing
leakage and poor brake perfor-
mance.
l
Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor brake performance.
l
Be careful that water does not en-
ter the master cylinder when refill-
ing. Water will significantly lower
the boiling point of the fluid and
may result in vapor lock.
l
Brake fluid may deteriorate paint-
ed surfaces or plastic parts. Al-
ways clean up spilled fluid
immediately.
l
Have a Yamaha dealer check the
cause if the brake fluid level goes
down.
1. Minimum level mark
1. Minimum level mark
Recommended brake fluid: DOT 4
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