YAMAHA MT-03 2006 Repair Manual

1
2
3
4
5
6
7
8
9
10
PERIODIC MAINTENANCE AND MINOR REPAIR
Adjust the suspension and tire
air pressure with regard to the
load.
Check the tire condition and air
pressure before each ride.Tire inspection
1. Tire sidewall
2. Tire tread depth
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 sidewall is cracked, have a Yama-
ha dealer replace the tire immediately.
NOTE:
The tire tread depth limits may differ
from country to country. Always com-
ply with the local regulations.
EWA10470
WARNING0
Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the ve-
hicle with excessively worn
tires decreases riding stability
and can lead to loss of control.
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.
6-17
Minimum tire tread depth
(front and rear):
1.6 mm (0.06 in)
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-17

PERIODIC MAINTENANCE AND MINOR REPAIR
Tire information
1. Tire air valve
2. Valve core
3. Valve cap
This motorcycle is equipped with cast
wheels and tubeless tires with valves.
EWA10900
WARNING0
The front and rear tires should
be of the same make and de-
sign, otherwise the handling
characteristics of the motorcy-
cle cannot be guaranteed.
After extensive tests, only the
tires listed below have been
approved for this model by
Yamaha Motor Italia S.P.A.
Always make sure that the
valve caps are securely in-
stalled to prevent air pressure
leakage.
Use only the tire valves and
valve cores listed below to
avoid tire deflation during a
ride.
6-18
1
2
3
4
5
6
7
8
9
10
Front tire:
Size:
120/70-ZR17 M/C (58W)
120/70-R17 M/C (58H)
Manufacturer/model:
DUNLOP D270F
PIRELLI SCORPION SYNC
Tire air valve:
TR412
Valve core:
#9000A (standard)
Rear tire:
Size:
160/60-ZR17 M/C (69W)
160/60-R17 M/C (69H)
Manufacturer/model:
DUNLOP D270
PIRELLI SCORPION SYNC
Tire air valve:
TR412
Valve core:
#9000A (standard)
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-18

1
2
3
4
5
6
7
8
9
10
PERIODIC MAINTENANCE AND MINOR REPAIR
EWA10600
WARNING0
This motorcycle is fitted with super-
high-speed tires. Note the following
points in order to make the most ef-
ficient use of these tires.
Use only the specified replace-
ment tires. Other tires may run
the danger of bursting at super
high speeds.
Brand-new tires can have a rel-
atively poor grip on certain
road surfaces until they have
been "broken in". Therefore, it
is advisable before doing any
high-speed riding to ride con-
servatively for approximately
100 km (60 mi) after installing a
new tire.
The tires must be warmed up
before a high-speed run.
Always adjust the tire air pres-
sure according to the operating
conditions.
EAU21960
Cast wheels
To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points regard-
ing the specified wheels.
The wheel rims should be
checked for cracks, bends or
warpage before each ride. If any
damage is found, have a Yamaha
dealer replace the wheel. Do not
attempt even the smallest repair
to the wheel. A deformed or
cracked wheel must be replaced.
The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced.
An unbalanced wheel can result
in poor performance, adverse
handling characteristics, and a
shortened tire life.
Ride at moderate speeds after
changing a tire since the tire sur-
face must first be "broken in" for it
to develop its optimal characteris-
tics.
EAU22041
Adjusting the clutch lever
free play
1. Locknut
2. Adjusting bolt
3. Clutch lever free play
The clutch lever free play should mea-
sure 10.0-15.0 mm (0.39-0.59 in) as
shown. Periodically check the clutch
lever free play and, if necessary, ad-
just it as follows.
1. Loosen the locknut at the clutch
lever.
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).
6-19
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-19

PERIODIC MAINTENANCE AND MINOR REPAIR
NOTE:
If the specified clutch lever free play
could be obtained as described
above, tighten the locknut and skip the
rest of the procedure, otherwise pro-
ceed as follows.
3. Fully turn the adjusting bolt at the
clutch lever in direction (a) to
loosen the clutch cable.
4. Loosen the locknut at the
crankcase.
1. Locknut
2. Clutch lever free play adjusting nut
(crankcase)
5. 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).
6. Tighten the locknut at the clutch
lever and the crankcase.
EAU22390
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.
6-20
1
2
3
4
5
6
7
8
9
10
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-20

1
2
3
4
5
6
7
8
9
10
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU22420
Front brake pads
1. Front brake pad wear indicator groove
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 dis-
appeared, have a Yamaha dealer re-
place the brake pads as a set.
EAU22500
Rear brake pads
1. Rear brake pad lining thickness
Check each rear brake pad for dam-
age and measure the lining thickness.
If a brake pad is damaged or if the lin-
ing thickness is less than 1.0 mm
(0.04 in), have a Yamaha dealer re-
place the brake pads as a set.
EAU22580
Checking the brake fluid
level
Front brake
1. Minimum level mark
Rear brake
1. Minimum level mark
6-21
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-21

PERIODIC MAINTENANCE AND MINOR REPAIR
Insufficient brake fluid may allow air to
enter the brake system, possibly caus-
ing it to become ineffective.
Before riding, check that the brake flu-
id is above the minimum level mark
and replenish if necessary. A low
brake fluid level may indicate worn
brake pads and/or brake system leak-
age. If the brake fluid level is low, be
sure to check the brake pads for wear
and the brake system for leakage.
Observe these precautions:
When checking the fluid level,
make sure that the top of the
brake fluid reservoir is level.
Use only the recommended qual-
ity brake fluid, otherwise the rub-
ber seals may deteriorate, caus-
ing leakage and poor braking
performance.
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 imme-
diately.
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
suddenly, have a Yamaha dealer
check the cause.
6-22
1
2
3
4
5
6
7
8
9
10
Recommended brake fluid:
DOT 4
EAU22730
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 addi-
tion, have the oil seals of the master
cylinders 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.
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-22

1
2
3
4
5
6
7
8
9
10
PERIODIC MAINTENANCE AND MINOR REPAIR
6-23
EAU22760
Drive chain slack
The drive chain slack should be
checked before each ride and adjusted
if necessary.
EAU22771
To check the drive chain slack
1. Drive chain slack
1. Place the motorcycle on the side-
stand.
NOTE:
When checking and adjusting the dri-
ve chain slack, there should be no
weight on the motorcycle.
2. Shift the transmission into the
neutral 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 incor-
rect, adjust it as follows.
Drive chain slack:
40.0-50.0 mm (1.57-1.97 in)
EAU34311
To adjust the drive chain slack
1. Loosen the axle nut and the lock-
nut on each side of the swingarm.
2. To tighten the drive chain, turn the
adjusting bolt on each side of the
swingarm in direction (a). To
loosen the drive chain, turn the
adjusting bolt on each side of the
swingarm in direction (b), and
then push the rear wheel forward.
NOTE:
Using the alignment marks on each
side of the swingarm, make sure that
both chain pullers are in the same po-
sition for proper wheel alignment.
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-23

PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
1
2
3
4
5
6
7
8
9
10
1. Axle nut
2. Drive chain slack adjusting bolt
3. Locknut
4. Alignment marks
ECA10570
CAUTION:
Improper drive chain slack will
overload the engine as well as oth-
er vital parts of the motorcycle and
can lead to chain slippage or break-
age. To prevent this from occurring,
keep the drive chain slack within
the specified limits.
Tightening torques:
Locknut:
16 Nm (1.6 m·kgf, 11 ft·lbf)
Axle nut:
150 Nm (15.0 m·kgf, 108 ft·lbf)
EAU23022
Cleaning and 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.
ECA10581CAUTION:
The drive chain must be lubricated
after washing the motorcycle and
riding in the rain.
1. Clean the drive chain with
kerosene and a small soft brush.
ECA11120CAUTION:
To prevent damaging the O-rings,
do not clean the drive chain with
steam cleaners, high-pressure
washers or inappropriate solvents. 3. Tighten the locknuts, then the
axle nut to their specified torques.
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-24

1
2
3
4
5
6
7
8
9
10
PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
2. Wipe the drive chain dry.
3. Thoroughly lubricate the drive
chain with a special O-ring chain
lubricant.
ECA11110CAUTION:
Do not use engine oil or any other
lubricants for the drive chain, as
they may contain substances that
could damage the O-rings.
EAU23100
Checking and lubricating
the cables
The operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubri-
cated if necessary. If a cable is dam-
aged or does not move smoothly,
have a Yamaha dealer check or re-
place it.
Recommended lubricant:
Engine oil
EWA10720
WARNING0
Damage to the outer sheath may in-
terfere with proper cable operation
and will cause the inner cable to
rust. Replace a damaged cable as
soon as possible to prevent unsafe
conditions.
EAU23111
Checking and lubricating
the throttle grip and cable
The operation of the throttle grip
should be checked before each ride.
In addition, the cable should be lubri-
cated at the intervals specified in the
periodic maintenance chart.
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-25

PERIODIC MAINTENANCE AND MINOR REPAIR
6-26
1
2
3
4
5
6
7
8
9
10
EAU23140
Checking and lubricating
the brake and clutch levers
Brake lever
Clutch lever
The operation of the brake and clutch
levers should be checked before each
ride, and the lever pivots should be lu-
bricated if necessary.
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
EAU23180
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.
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
MY03 04-06 ING 6-10-2005 9:25 Pagina 6-26