2000 YAMAHA SR125 wheel

TABLE OF CONTENTS
Throttle cable free play adjustment .................. 6-12
Cam chain adjustment ..................................... 6-12
Valve clearance adjustment ............................. 6-13
Tires ................................................................. 6-13
Wheels ............................................................. 6-15
Clutch lever free play adjustment..................... 6-16
Front brake lever free play adjustment ............ 6-16
Rear brake pedal height and free play
adjustment .................................................... 6-17
Brake light switch adjustment .......................... 6-18
Checking the front brake pads and
rear brake shoes .......................................... 6-19
Inspecting the brake fluid level......................... 6-20
Brake fluid replacement ................................... 6-20
Drive chain slack check ................................... 6-21
Drive chain slack adjustment ........................... 6-22
Drive chain lubrication...................................... 6-23
Cable inspection and lubrication ...................... 6-23
Throttle cable and grip lubrication .................... 6-23
Brake and shift pedal lubrication ...................... 6-24
Brake and clutch lever lubrication .................... 6-24
Center and sidestand lubrication ..................... 6-24
Front fork inspection ........................................ 6-25
Steering inspection .......................................... 6-26
Wheel bearings ................................................ 6-26
Battery.............................................................. 6-26
Fuse replacement ............................................ 6-28
Headlight bulb replacement ............................. 6-29Turn signal and tail/brake light bulb
replacement.................................................. 6-30
Front wheel removal ........................................ 6-30
Front wheel installation .................................... 6-31
Rear wheel removal ......................................... 6-32
Rear wheel installation ..................................... 6-33
Troubleshooting ............................................... 6-33
Troubleshooting chart ...................................... 6-34
MOTORCYCLE CARE AND STORAGE ............. 7-1
Care ................................................................... 7-1
Storage .............................................................. 7-4
SPECIFICATIONS ............................................... 8-1
Specifications ..................................................... 8-1
How to use the conversion table ........................ 8-5
CONSUMER INFORMATION.............................. 9-1
Identification number records............................. 9-1
Key identification number................................... 9-1
Vehicle identification number ............................. 9-1
Model label......................................................... 9-2
789
E_3mw.book Page 2 Monday, February 5, 2001 9:54 AM

4-1
4
EAU01114
4-PRE-OPERATION CHECKS
Owners are personally responsible for their vehicle’s condition. Your motorcycle’s vital functions can start to deteriorate
quickly and unexpectedly, even if it remains unused (for instance, if it is exposed to the elements). Any damage, fluid leak or
loss of tire pressure could have serious consequences. Therefore, it is very important that, in addition to a thorough visual in-
spection, you check the following points before each ride.
EAU00340
PRE-OPERATION CHECK LIST
ITEM CHECKS PAGE
Front brake• Check operation, free play, fluid level and fluid leakage.
• Fill with DOT 4 (or DOT 3) brake fluid if necessary.
6-16 ~ 6-20
Rear brake• Check operation, condition and free play.
• Adjust if necessary.
Clutch• Check operation, condition and free play.
• Adjust if necessary.6-16
Throttle grip and housing• Check for smooth operation.
• Lubricate if necessary.6-23
Engine oil• Check oil level.
• Fill with oil if necessary.6-8 ~ 6-9
Drive chain• Check chain slack and condition.
• Adjust if necessary.6-21 ~ 6-23
Wheels and tires• Check tire pressure, wear, damage and spoke tightness.
• Tighten spokes if necessary.6-13 ~ 6-15, 6-30 ~ 6-33
Control and meter cables• Check for smooth operation.
• Lubricate if necessary.6-23
Brake and shift pedal
shafts• Check for smooth operation.
• Lubricate if necessary.6-24
Brake and clutch lever
pivots• Check for smooth operation.
• Lubricate if necessary.6-24
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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
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 24,000 km
16*Chassis fasteners• Make sure that all nuts, bolts and screws are properly tightened.ÖÖÖÖ Ö
17 Sidestand, centerstand• Check operation.
• Lubricate.ÖÖÖÖ Ö
18*Sidestand switch• Check operation.ÖÖÖÖÖ Ö
19*Front fork• Check operation and for oil leakage.ÖÖÖÖ
20*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•Clean.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 6 12 18 24
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-15
6
EAU00681
WARNING
@ l
Operating the motorcycle with
excessively worn tires decrease
riding stability and can lead to
loss of control. Have excessive-
ly worn tires replaced by a
Yamaha dealer immediately.
Brakes, tires, and related wheel
parts replacement should be
left to a Yamaha Service Techni-
cian.
l
Patching a punctured tube is
not recommended. If it is abso-
lutely necessary to do so, use
great care and replace the tube
as soon as possible with a good
quality replacement.
@
EAU00685
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 wheel. Be sure the
spokes are tight and undamaged.
If any abnormal condition exists in
a wheel, consult a Yamaha dealer.
Do not attempt even small repairs
to the wheel. If a wheel is de-
formed or cracked, it must be re-
placed.
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
6-21
6
EAU00746
Drive chain slack checkNOTE:@ Spin the wheel several times and find
the tightest position of the chain. Check
and/or adjust the chain slack while it’s
in this tightest position. @The chain slack should be checked
through the inspection window in the
chain case by the following procedure.
1. Place the motorcycle on the cen-
terstand.
2. Put the transmission in neutral.
3. While looking in the inspection
window, rotate the rear wheel.4. Chain slack is correct if the full end
of the chain link can be seen in the
usable range as shown in illustra-
tion.
5. If any portion of the top or bottom
of the chain link end is hidden, ad-
just the chain.1. Inspection window
1. USABLE RANGE
2. Too tight
3. Too loose
E_3mw.book Page 21 Monday, February 5, 2001 9:54 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6
EAU01533
Drive chain slack adjustment1. Loosen the rear brake adjusting
nut.
2. Loosen the wheel axle nut.3. To tighten the chain, turn the chain
adjusting plates in direction
a.
To loosen the chain, turn the chain
adjusting plates in direction
b and
push the wheel forward. Turn each
chain adjusting plate to exactly the
same position to maintain correct
axle alignment.
EC000096
CAUTION:@ Too little chain slack will overload
the engine and other vital parts.
Keep the slack within the specified
limits. @
4. Tighten the wheel axle nut to the
specified torque.
5. Adjust the brake pedal free play.
EW000103
WARNING
@ Check the operation of the brake
light after adjusting the rear brake. @
1. Adjusting nut
1. Axle nut
2. Chain adjusting plate
Tightening torque:
Wheel axle nut:
65 Nm (6.5 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-26
6
EAU00794
Steering inspectionPeriodically inspect the condition of the
steering. Worn out or loose steering
bearings may be dangerous. Place a
stand under the engine to raise the
front wheel off the ground. Hold the
lower end of the front forks and try to
move them forward and backward. If
any free play can be felt, ask a Yamaha
dealer to inspect and adjust the steer-
ing. Inspection is easier if the front
wheel is removed.
EW000115
WARNING
@ Securely support the motorcycle so
there is no danger of it falling over. @
EAU01144
Wheel bearingsIf there is play in the front or rear wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer in-
spect the wheel bearings.
EAU01647
BatteryRemove panel A. (See page 6-5 for re-
moval and installation procedures.)
Check the level of the battery electro-
lyte and make sure that the terminals
are tight. Fill with distilled water if the
electrolyte level is low.1. Maximum level mark
2. Minimum level mark
E_3mw.book Page 26 Monday, February 5, 2001 9:54 AM

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
E_3mw.book Page 30 Monday, February 5, 2001 9:54 AM