check engine YAMAHA XV125S 2000 User Guide

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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU00634Throttle cable free play
adjustment
NOTE:
Before checking the throttle cable
free play, the engine idling speed
should be adjusted.
Adjust the throttle cable by turning
the adjusting nut so that specified
free play at the throttle grip is
obtained.
1. Adjusting nut
2. Locknut
c. Free play
1. Loosen the locknut.
2. Turn the adjusting nut in direc-
tion ato increase free play
and in direction bto decrease
free play.
3. Tighten the locknut.
12ab
c
Free play:
3 ~ 5 mmEAU00637Valve clearance adjustment
The correct valve clearance
changes with use, resulting in
improper fuel/air supply or engine
noise. To prevent this, the valve
clearance must be adjusted regu-
larly. This adjustment however,
should be left to a professional
Yamaha service technician.
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU02984Brake and shift pedal
lubrication
Lubricate the pivoting parts.
EAU02985Brake and clutch lever
lubrication
Lubricate the pivoting parts.
Recommended lubricant:
Engine oil
Recommended lubricant:
Engine oil
EAU02986Sidestand lubrication
Lubricate the sidestand pivoting
point and metal-to-metal contact
surfaces. Check that the sidestand
moves up and down smoothly.
EW000113
w
If the sidestand does not move
smoothly, consult a Yamaha deal-
er.
Recommended lubricant:
Engine oil
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EAU00794Steering inspection
Periodically inspect the condition
of the steering. Worn out or loose
steering bearings may be danger-
ous. 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
steering. Inspection is easier if the
front wheel is removed.
PERIODIC MAINTENANCE AND MINOR REPAIR
Operation check
1. Place the motorcycle on a level
place.
2. Hold the motorcycle in an
upright position and apply the
front brake.
3. Push down hard on the han-
dlebars several times and
check if the fork rebounds
smoothly.
EC000098
cC
If any damage or unsmooth move-
ment is found with the front fork,
consult a Yamaha dealer.
EAU02939Front fork inspection
Visual checkEW000115
w
Securely support the motorcycle
so there is no danger of it falling
over.
Check for scratches or damage on
the inner tube and excessive oil
leakage from the front fork.
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EAU00862Supporting the motorcycle
Since the Yamaha XV125S has no
centerstand, follow these precau-
tions when removing the front and
rear wheel or performing other
maintenance requiring the motor-
cycle to stand upright.
Front wheel service
To stabilize the rear of the motor-
cycle, either use a motorcycle
stand or place a motorcycle jack
under the frame in front of the rear
wheel to prevent it from moving
from side to side. Then use a
motorcycle stand to elevate the
front wheel off of the ground.Rear wheel service
Use a motorcycle stand or motor-
cycle jack to elevate the motorcycle
so the rear wheel is off the ground.
Alternatively, two jacks can be
placed under the frame or
swingarm.
Check that the motorcycle is in a
stable and level position before
starting any maintenance. A strong
wooden box can be placed under
the engine for added stability.
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EAU00894Front wheel removalEW000122
w
8It is advisable to have a
Yamaha dealer service the
wheel.
8Securely support the motorcy-
cle so there is no danger of it
falling over.
1. Remove the speedometer
cable from the front wheel
side.
1. Speedometer cable
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PERIODIC MAINTENANCE AND MINOR REPAIR
5. Push down hard on the han-
dlebars several times to check
for proper fork operation.
6. Tightening the wheel axle to
the specified torque.
7. Install the pinch bolts and
tighten them to the specified
torque.
8. Install the speedometer cable.EAU01550Rear wheel removalEW000122
w
8It is advisable to have a
Yamaha dealer service the
wheel.
8Securely support the motorcy-
cle so there is no danger of it
falling over.
1. Remove the axle nut cotter pin
and brake torque rod cotter
pin. Tightening torque:
Wheel axle:
59 Nm (5.9 m·kg)
Pinch bolt:
20 Nm (2.0 m·kg)
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2. Loosen the axle nut and brake
torque nut.
3. Elevate the rear wheel by plac-
ing a suitable stand under the
engine.
4. Remove the brake torque rod
nut and bolt from the brake
shoe plate.
1. Brake torque rod
2. Brake torque rod cotter pin
3. Brake torque rod nut
4. Brake rod
5. Rear brake pedal free play adjusting nut
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EAU01562
Troubleshooting chart
EW000125
wNever check the fuel system while smoking or in the vicinity of an open flame.1. Fuel
2. Compression
3. Ignition
4. Battery
Remove spark
There is compression.
Go to ignition check.
No compression.
Ask a Yamaha dealer to inspect.Wet.
Dry.Wipe clean with dry cloth and correct Open throttle half-way and start the
Ask a Yamaha dealer to inspect.
Engine turns over
Engine turns overBattery good.
Check fluid, recharge,
Check if there is fuel
Enough fuel.
No fuel.
Go to compression check.Supply fuel.
in the fuel tank
electrode. plugs and check
quickly.
slowly. check connections.Engine doesn’t start, go to battery
check.engine. plug gap or replace spark plugs.
Engine doesn’t start, ask aYamaha dealer to inspect.
Engine doesn’t start, go to compression check.
Use the electric
starter. Use the electric starter.
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