2000 YAMAHA YZF-R1 brake

PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
6 Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail
or glass fragments in it, or if the side-
wall is cracked, have a Yamaha dealer
replace the tire immediately.
CE-26ENOTE:@ The tire tread depth limits may differ
from country to country. Always comply
with the local regulations. @
EW000079
WARNING
@ l
Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the
motorcycle with excessively
worn tires decreases riding sta-
bility and can lead to loss of
control.
l
The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.
@
Tire information
This motorcycle is equipped with cast
wheels and tubeless tires with valves.
1. Sidewall
a. Tire tread depthMinimum tire tread depth
(front and rear)1.6 mm
1. Tire air valve
2. Valve core
3. Valve cap with seal
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-23
62. Remove cowling A. (See page 6-5
for cowling removal and installa-
tion procedures.)
3. Loosen the locknut at the crank-
case.
4. To increase the clutch lever free
play, turn the adjusting nut in di-
rection
a. To decrease the clutch
lever free play, turn the adjusting
nut in direction
b.
5. Tighten the locknut.
6. Install the cowling.
EAU01357
Adjusting the brake pedal
position The top of the brake pedal should be
positioned approximately 35–40 mm
below the bottom of the footrest brack-
et as shown. Periodically check the
brake pedal position and, if necessary,
have a Yamaha dealer adjust it.
EW000109
WARNING
@ A soft or spongy feeling in the brake
pedal can indicate the presence of
air in the hydraulic system. If there
is air in the hydraulic system, have a
Yamaha dealer bleed the system be-
fore operating the motorcycle. Air in
the hydraulic system will diminish
the braking performance, which
may result in loss of control and an
accident. @
1. Locknut
2. Adjusting nut
a. Distance between brake pedal and footrest
bracket
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
6
EAU00713
Adjusting the rear brake light
switch The rear brake light switch, which is ac-
tivated by the brake pedal, is properly
adjusted when the brake light comes
on just before braking takes effect. If
necessary, adjust the brake light switch
as follows.
Turn the adjusting nut while holding the
rear brake light switch in place. To
make the brake light come on earlier,
turn the adjusting nut in direction
a. To
make the brake light come on later,
turn the adjusting nut in direction
b.
EAU00721
Checking the front and rear
brake pads The front and rear brake pads must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart.
EAU00725
Front brake pads
Each front brake pad is provided with a
wear indicator groove, which allows
you to check the brake pad wear with-
out having to disassemble the brake.
To check the brake pad wear, check
the wear indicator groove. If a brake
pad has worn to the point that the wear
indicator groove has almost disap-
peared, have a Yamaha dealer replace
the brake pads as a set.
1. Brake light switch
2. Adjusting nut
1. Wear indicator grooveFront
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
6
EAU01248
Rear brake pads
1. Remove the rear brake caliper by
removing the bolts.2. Check each rear brake pad for
damage and measure the lining
thickness. If a brake pad is dam-
aged or if the lining thickness is
less than 0.5 mm, have a Yamaha
dealer replace the brake pads as a
set.
3. Install the rear brake caliper by in-
stalling the bolts, then tightening
them to the specified torque.
EAU00731
Checking the brake fluid level Insufficient brake fluid may allow air to
enter the brake system, possibly caus-
ing it to become ineffective.
Before riding, check that the brake fluid
is above the minimum level mark and
replenish if necessary. A low brake flu-
id level may indicate worn brake pads
and/or brake system leakage. If the
brake level is low, be sure to check the
brake pads for wear and the brake sys-
tem for leakage.
1. Caliper bolt (´ 2)Rear
a. Lining thickness
Tightening torque:
Brake caliper bolt:
40 Nm (4.0 m·kg)
1. Minimum level markFront
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-26
6 Observe these precautions:
l
When checking the fluid level,
make sure that the top of the mas-
ter cylinder is level by turning the
handlebars.
l
Use only the recommended quali-
ty brake fluid, otherwise the rubber
seals may deteriorate, causing
leakage and poor braking perfor-
mance.
l
Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor braking 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
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.
EAU00742
Changing the brake fluid Have a Yamaha dealer change the
brake fluid at the intervals specified in
the periodic maintenance and lubrica-
tion chart. In addition, have the oil seals
of the brake master cylinders and cali-
pers as well as the brake hoses re-
placed at the intervals listed below or
whenever they are damaged or leak-
ing.l
Oil seals: Replace every two
years.
l
Brake hoses: Replace every four
years.
1. Minimum level mark
Recommended brake fluid: DOT 4Rear
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
EAU03163
Lubricating the brake pedal The operation of the brake pedal
should be checked before each ride,
and the pedal pivot should be lubricat-
ed if necessary.
EAU03164
Checking and lubricating the
brake and clutch levers The operation of the brake and clutch
levers should be checked before each
ride, and the lever pivots should be lu-
bricated if necessary.
EAU03165
Checking and lubricating the
sidestand The operation of the sidestand should
be checked before each ride, and the
sidestand pivot and metal-to-metal
contact surfaces should be lubricated if
necessary.
EW000113
WARNING
@ If the sidestand does not move up
and down smoothly, have a Yamaha
dealer check or repair it. @
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-31
6
EAU03166
Lubricating the rear
suspension The pivoting points of the rear suspen-
sion must be lubricated at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU02939
Checking the front fork The condition and operation of the front
fork must be checked as follows at the
intervals specified in the periodic main-
tenance and lubrication chart.
To check the condition
EW000115
WARNING
@ Securely support the motorcycle so
that there is no danger of it falling
over. @Check the inner tubes for scratches,
damage and excessive oil leakage.To check the operation
1. Place the motorcycle on a level
surface and hold it in an upright
position.
2. While applying the front brake,
push down hard on the handle-
bars several times to check if the
front fork compresses and re-
bounds smoothly.
EC000098
CAUTION:@ If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re-
pair it. @
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-37
6
EAU01358
Replacing the tail/brake light
bulb 1. Remove the passenger seat. (See
page 3-14 for passenger seat re-
moval and installation proce-
dures.)
2. Remove the tail/brake light bulb
cover.3. Remove the socket (together with
the bulb) by turning it counter-
clockwise.
4. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.
5. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
6. Install the socket (together with
the bulb) by turning it clockwise.
7. Install the bulb cover.
8. Install the passenger seat.
EAU01095
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.
1. Tail/brake light bulb cover
1. Socket
1. Screw
E_5jj_Periodic.fm Page 37 Wednesday, February 2, 2000 5:18 PM