maintenance YAMAHA SR125 2000 Owner's Guide

PERIODIC MAINTENANCE AND MINOR REPAIR
6-29
6
EAU03003
Headlight bulb replacementThis motorcycle is equipped with a
quartz bulb headlight.
If the headlight bulb burns out, replace
the bulb as follows:
1. Remove the headlight unit screws.
2. Remove the connector, the head-
light unit and then the bulb holder
cover.3. Turn the bulb holder counterclock-
wise to remove it and remove the
defective bulb.
EWA00023
WARNING
@ Keep flammable products and your
hands away from the bulb while it is
on, as it is hot. Do not touch the bulb
until it cools down. @4. Put a new bulb into position and
secure it in place with the bulb
holder.
ECA00040
CAUTION:@ Avoid touching the glass part of the
bulb. Keep it free from oil; other-
wise, the transparency of the glass,
life of the bulb, and luminous flux
will be adversely affected. If oil gets
on the bulb, thoroughly clean it with
a cloth moistened with alcohol or
lacquer thinner. @5. Install the bulb holder cover, con-
nector and headlight unit.
Ask a Yamaha dealer to adjust the
headlight beam if that adjustment
is necessary.
1. Screw (´ 2)
2. Bulb holder cover
1. Bulb holder
1. Don’t touch
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
EAU00855*
Turn signal and tail/brake light
bulb replacement1. Remove the screws and the lens.
2. Push the bulb inward and turn it
counterclockwise.3. Place a new bulb in the socket.
Push the bulb inward and turn it
clockwise until it engages into the
socket.
4. Install the lens and the screws.
EC000108
CAUTION:@ Do not over-tighten the screws as
the lens may break. @
EAU00866
Front wheel removal
EW000122
WARNING
@ l
It is advisable to have a Yamaha
dealer service the wheel.
l
Securely support the motor-
cycle so there is no danger of it
falling over.
@1. Place the motorcycle on the cen-
terstand.
2. Remove the speedometer cable
from the front wheel side.
1. Screw (´ 2)
1. Screw
1. Speedometer cable
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-31
6 3. Loosen the pinch bolt.
4. Remove the wheel axle. Make
sure the motorcycle is properly
supported.
NOTE:@ Do not depress the brake lever when
the disc and caliper are separated. @
EAU01394
Front wheel installation1. Install the speedometer gear unit
into the wheel hub. Make sure the
wheel hub and the speedometer
gear unit are installed with the pro-
jections meshed into the slots.
2. Lift up the wheel between the front
fork legs and guide the brake disc
between the brake pads. Make
sure the slot in the speedometer
gear unit fits over the stopper on
the front fork outer tube.
3. Install the wheel axle and let the
motorcycle down.4. Push down hard on the handle-
bars several times to check for
proper fork operation.
5. Tighten the wheel axle to the
specified torque.
6. Install the pinch bolt and tighten it
to the specified torque.
7. Install the speedometer cable.
1. Wheel axle
2. Pinch bolt
Tightening torque:
Wheel axle:
59 Nm (5.9 m·kg)
Pinch bolt:
20 Nm (2.0 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6
EAU01116*
Rear wheel removal
EW000122
WARNING
@ l
It is advisable to have a Yamaha
dealer service the wheel.
l
Securely support the motor-
cycle so there is no danger of it
falling over.
@1. Place the motorcycle on the cen-
terstand.
2. Remove the cotter pin and nut.
Then remove the brake torque rod
bolt from the brake shoe plate.
3. Remove the brake adjusting nut
and brake rod from the brake cam
lever.4. Loosen the chain adjusting plates
on each side.
5. Remove the axle nut.
6. Pull out the rear axle.
7. Push the wheel forward and re-
move the drive chain.
8. Remove the wheel assembly.
1. Adjusting nut
2. Brake rod
3. Brake torque rod
4. Cotter pin
1. Axle nut
2. Chain adjusting plate
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-33
6
EAU01723*
Rear wheel installation1. Install the rear wheel and the axle.
2. Install the axle nut and let the
motorcycle down.
3. Insert the brake rod into the brake
cam lever and install the brake
pedal free play adjusting nut.
4. Install the brake torque rod bolt
and tighten to the specified tight-
ening torque. Then install a new
cotter pin.
5. Adjust the drive chain free play.
(See page 6-22.)
6. Tighten the axle nut to the speci-
fied tightening torque.7. Adjust the rear brake pedal height
and free play. (See page 6-17.)
EW000103
WARNING
@ Check the operation of the brake
light after adjusting the rear brake. @
EAU01008
TroubleshootingAlthough Yamaha motorcycles receive
a rigid inspection before shipment from
the factory, trouble may occur during
operation.
Any problem in the fuel, compression,
or ignition systems can cause poor
starting and loss of power. The trouble-
shooting chart describes a quick, easy
procedure for making checks.
If your motorcycle requires any repair,
bring it to a Yamaha dealer. The skilled
technicians at a Yamaha dealership
have the tools, experience, and know-
how to properly service your motor-
cycle. Use only genuine Yamaha parts
on your motorcycle. Imitation parts may
look like Yamaha parts, but they are of-
ten inferior. Consequently, they have a
shorter service life and can lead to ex-
pensive repair bills. Specified torque:
Brake torque rod bolt:
25 Nm (2.5 m·kg)
Specified torque:
Axle nut:
65 Nm (6.5 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-34
6
EAU03009
Troubleshooting chart
EW000125
WARNING
@ Never check the fuel system while smoking or in the vicinity of an open flame. @
Check if there is fuel in
the fuel tank.1. Fuel
Enough fuel.
No fuel.
Go to compression check.
Supply fuel.
Engine doesn’t start, go to compression check.
Use the electric starter.2. Compression
There is compression.
No compression.
Go to ignition check.
Ask a Yamaha dealer to
inspect.
Remove spark plug and
check electrodes.3. Ignition
Wet.
Dry.
Wipe clean with dry cloth and correct
spark gap or replace spark plug.
Ask a Yamaha dealer to inspect.
Engine doesn’t start, ask a Yamaha
dealer to inspect.Engine doesn’t start, go to battery
check.Open throttle half-way and start
the engine.
Use the electric starter.4. Battery
Engine turns over
quickly.
Engine turns over
slowly.
Battery good.Check fluid, recharge,
check connections.
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MOTORCYCLE CARE AND STORAGE
7-5
7 a. Remove the spark plug cap and
spark plug.
b. Pour a teaspoonful of engine oil
into the spark plug bore.
c. Install the spark plug cap onto the
spark plug and place the spark
plug on the cylinder head so that
the electrodes are grounded. (This
will limit sparking during the next
step.)
d. Turn the engine over several times
with the starter. (This will coat the
cylinder wall with oil.)
e. Remove the spark plug cap from
the spark plug, install the spark
plug and then the spark plug cap.
EWA00003
WARNING
@ When turning the engine over, be
sure to ground the spark plug elec-
trodes to prevent damage or injury
from sparking. @
6. Lubricate all control cables and
the pivoting points of all levers and
pedals as well as of the sidestand/
centerstand.
7. Check and, if necessary, correct
the tire air pressure, then raise the
motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
8. Cover up the muffler outlet with a
plastic bag to prevent moisture
from entering.9. Remove the battery and fully
charge it. Store it in a cool, dry
place and recharge it once a
month. Do not store the battery in
an excessively cold or warm place
(less than 0 °C or more than
30 °C). For more information, see
“Battery storage” in the chapter
“PERIODIC MAINTENANCE AND
MINOR REPAIRS”.
NOTE:@ Make any necessary repairs before
storing the motorcycle. @
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