Page 35 of 88

PERIODIC MAINTENANCE AND MINOR REPAIR
6-3
6
10
*Wheels• Check runout, spoke tightness and for damage.
• Tighten spokes if necessary.ÖÖÖÖ
11*Tires• Check tread depth and for damage.
• Replace if necessary.
• Check air pressure.
• Correct if necessary.ÖÖÖÖ
12*Wheel bearings• Check bearing for looseness or damage.ÖÖÖÖ
13*Swingarm• Check operation and for excessive play.ÖÖÖÖ
• Lubricate with molybdenum disulfide grease. Every 50,000 km
14 Drive chain• Check chain slack.
• Make sure that the rear wheel is properly aligned.
• Clean and lubricate.Every 1,000 km and after washing
the motorcycle or riding in the rain.
15*Steering bearings• Check bearing play and steering for roughness.ÖÖÖÖÖ
• Lubricate with lithium-soap-based grease. Every 20,000 km
16*Chassis fasteners• Make sure that all nuts, bolts and screws are properly tightened.ÖÖÖÖ Ö
17 Sidestand• Check operation.
• Lubricate.ÖÖÖÖ Ö
18*Sidestand switch• Check operation.ÖÖÖÖÖ Ö
19*Front fork• Check operation and for oil leakage.ÖÖÖÖ
20*Rear shock absorber
assemblies• Check operation and shock absorbers for oil leakage.ÖÖÖÖ
21*Carburetor• Check starter (choke) operation.
• Adjust engine idling speed.ÖÖÖÖÖ Ö
22 Engine oil• Change.ÖÖÖÖÖ Ö
23 Engine oil filter element• Replace.ÖÖÖ
24*Front and rear brake
switches• Check operation.ÖÖÖÖÖ Ö
25 Moving parts and cables• Lubricate.ÖÖÖÖ Ö NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (´1,000 km)
ANNUAL
CHECK
1 10203040
E_5kr.book Page 3 Tuesday, September 12, 2000 4:46 PM
Page 36 of 88
PERIODIC MAINTENANCE AND MINOR REPAIR
6-4
6
EAU03541
NOTE:_l
The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
l
Hydraulic brake service
• Regularly check and, if necessary, correct the brake fluid level.
• Every two years replace the internal components of the brake master cylinder and caliper, and change the brake fluid.
• Replace the brake hoses every four years and if cracked or damaged.
_26
*Air induction system• Check the air cut valve and reed valve for damage.
• Replace the entire air induction system if necessary.ÖÖÖÖ Ö
27*Lights, signals and
switches• Check operation.
• Adjust headlight beam.ÖÖÖÖÖ Ö NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (´1,000 km)
ANNUAL
CHECK
1 10203040
E_5kr.book Page 4 Tuesday, September 12, 2000 4:46 PM
Page 50 of 88

PERIODIC MAINTENANCE AND MINOR REPAIR
6-18
6
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 tube
tires.
EW000078
WARNING
_ l
The front and rear tires should
be of the same make and de-
sign, otherwise the handling
characteristics of the motor-
cycle cannot be guaranteed.
l
After extensive tests, only the
tires listed below have been ap-
proved for this model by
Yamaha Motor Co., Ltd.
_CE-10EEAU00681
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.
l
It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube
very carefully and replace it as
soon as possible with a high-
quality product.
_
FRONT
Manufacturer Size Model
CHENG SHIN 80/100-18 47P C-916
INOUE 80/100-18 47PMARBELLA
NF27
REAR
Manufacturer Size Model
CHENG SHIN 130/90-15 M/C 66P C-915
INOUE 130/90-15 M/C 66PMARBELLA
NR31
E_5kr.book Page 18 Tuesday, September 12, 2000 4:46 PM
Page 52 of 88

PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
6
EAU00696
Adjusting the brake lever free
play The brake lever free play should mea-
sure 5–8 mm as shown. Periodically
check the brake lever free play and, if
necessary, adjust it as follows.
1. Loosen the locknut at the brake
lever.
2. To increase the brake lever free
play, turn the adjusting bolt in di-
rection
a. To decrease the brake
lever free play, turn the adjusting
bolt in direction
b.
3. Tighten the locknut.
EW000099
WARNING
_ l
After adjusting the brake lever
free play, check the free play
and make sure that the brake is
working properly.
l
A soft or spongy feeling in the
brake lever can indicate the
presence of air in the hydraulic
system. If there is air in the hy-
draulic system, have a Yamaha
dealer bleed the system before
operating the motorcycle. Air in
the hydraulic system will dimin-
ish the braking performance,
which may result in loss of con-
trol and an accident.
_
EAU03778
Adjusting the brake pedal
position and free play
EW000104
WARNING
_ It is advisable to have a Yamaha
dealer make these adjustments. _Brake pedal position
The top of the brake pedal should be
positioned approximately 76.6 mm
above the top of the footrest as shown.
Periodically check the brake pedal po-
sition and, if necessary, adjust it as
follows.
1. Locknut
2. Brake lever free play adjusting bolt
c. Brake lever free play
1. Footrest
a. Distance between brake pedal and footrest
b. Brake pedal free play
E_5kr.book Page 20 Tuesday, September 12, 2000 4:46 PM
Page 53 of 88

PERIODIC MAINTENANCE AND MINOR REPAIR
6-21
6 1. Loosen the locknut at the brake
pedal.
2. To raise the brake pedal, turn the
adjusting bolt in direction
a. To
lower the brake pedal, turn the ad-
justing bolt in direction
b.
3. Tighten the locknut.
EWA00044
WARNING
_ After adjusting the brake pedal posi-
tion, the brake pedal free play must
be adjusted. _
Brake pedal free play
The brake pedal free play should mea-
sure 20–30 mm at the brake pedal end.
Periodically check the brake pedal free
play and, if necessary, adjust it as
follows.
To increase the brake pedal free play,
turn the adjusting nut at the brake rod
in direction
a. To decrease the brake
pedal free play, turn the adjusting nut in
direction
b.
EW000106
WARNING
_ l
After adjusting the drive chain
slack or removing and installing
the rear wheel, always check
the brake pedal free play.
l
If proper adjustment cannot be
obtained as described, have a
Yamaha dealer make this ad-
justment.
l
After adjusting the brake pedal
free play, check the operation of
the brake light.
_
1. Brake pedal position adjusting bolt
2. Locknut
1. Brake pedal free play adjusting nut
E_5kr.book Page 21 Tuesday, September 12, 2000 4:46 PM
Page 54 of 88

PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
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.
EAU00720
Checking the front brake pads
and rear brake shoes The front brake pads and the rear
brake shoes must be checked for wear
at the intervals specified 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. Rear brake light switch
2. Rear brake light switch adjusting nut
1. Front brake pad wear indicator grooveFront
E_5kr.book Page 22 Tuesday, September 12, 2000 4:46 PM
Page 55 of 88

PERIODIC MAINTENANCE AND MINOR REPAIR
6-23
6
EAU00727
Rear brake shoes
The rear brake is provided with a wear
indicator, which allows you to check the
brake shoe wear without having to dis-
assemble the brake. To check the
brake shoe wear, check the position of
the wear indicator while applying the
brake. If a brake shoe has worn to the
point that the wear indicator reaches
the wear limit line, have a Yamaha
dealer replace the brake shoes as a
set.
EAU03294
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.Observe these precautions:
l
When checking the fluid level,
make sure that the top of the brake
fluid reservoir is level.
l
Use only the recommended quali-
ty brake fluid, otherwise the rubber
seals may deteriorate, causing
leakage and poor braking
performance.
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 brake fluid reservoir when
refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.
1. Rear brake shoe wear limit
2. Rear brake shoe wear indicatorRear
1. Minimum level mark
Recommended brake fluid: DOT 4
E_5kr.book Page 23 Tuesday, September 12, 2000 4:46 PM
Page 56 of 88

PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
6
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.
EAU03238
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 cylinder and caliper
as well as the brake hose replaced at
the intervals listed below or whenever
they are damaged or leaking.l
Oil seals: Replace every two
years.
l
Brake hose: Replace every four
years.
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. _
E_5kr.book Page 24 Tuesday, September 12, 2000 4:46 PM