light YAMAHA XV125S 2000 User Guide

5-5
OPERATION AND IMPORTANT RIDING POINTS
1
2
3
4
5
6
7
8
9
EAU00424Tips for reducing fuel
consumption
Your motorcycle’s fuel consump-
tion depends to a large extent on
your riding style. The following
tips can help reduce fuel consump-
tion:
8Warm up the engine before
riding.
8Turn off the starter (choke) as
soon as possible.
8Shift up swiftly and avoid high
engine speeds during accelera-
tion.
8Do not double-clutch or rev the
engine while shifting down
and avoid high engine speeds
with no load on the engine.
8Turn off the engine instead of
letting it idle for an extended
length of time, i.e. in traffic
jams, at traffic lights or rail-
road crossings.
EAU00436Engine break-in
There is never a more important
period in the life of your motorcy-
cle than the period between zero
and 1,000 km. For this reason we
ask that you carefully read the fol-
lowing material. Because the
engine is brand new, you must not
put an excessive load on it for the
first 1,000 km. The various parts in
the engine wear and polish them-
selves to the correct operating
clearances. During this period, pro-
longed full throttle operation, or
any condition which might result in
excessive heating of the engine,
must be avoided.
EAU004430 ~ 150 km
Avoid operation above 1/3 throttle.
Stop the engine and let it cool for 5
to 10 minutes after every hour of
operation. Vary the speed of the
motorcycle from time to time. Do
not operate it at one set throttle
position.
150 ~ 500 km
Avoid prolonged operation above
1/2 throttle. Rev the motorcycle
freely through the gears, but do
not use full throttle at any time.
500 ~ 1,000 km
Avoid cruising speeds in excess of
3/4 throttle.
EC000052
cC
After 1,000 km of operation, be
sure to replace the engine oil and
oil filter.
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 30

PERIODIC MAINTENANCE AND MINOR REPAIR
1
2
3
4
5
6
7
8
9
6-8
1
EAU03053Spark plugsRemoval
1. Remove the spark plug caps.
1. Spark plug cap
1
2. Use the spark plug wrench in
the tool kit to remove the spark
plugs as shown.
1. Spark plug wrench
Inspection
The spark plug is an important engine
component and is easy to inspect.
The condition of the spark plug can
indicate the condition of the engine.
Normally, all spark plugs from the
same engine should have the same
color on the white insulator around
the center electrode. The ideal color
at this point is a medium-to-light tan
color for a motorcycle that is being
ridden normally. If one spark plug
shows a distinctly different color,
there could be something wrong with
the engine.
Do not attempt to diagnose such
problems yourself. Instead, take the
motorcycle to a Yamaha dealer. You
should periodically remove and
inspect the spark plugs because heat
and deposits will cause any spark
plug to slowly break down and erode.
If electrode erosion becomes exces-
sive, or if carbon and other deposits
are excessive, you should replace the
spark plug with the specified plug.
Specified spark plug:
CR6HSA (NGK) or
U20FSR-U (DENSO)
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 39

6-9
PERIODIC MAINTENANCE AND MINOR REPAIR
1
2
3
4
5
6
7
8
9
1
2
3
EAU01523Engine oil
Oil level inspection
1. Place the motorcycle on a level
place and hold it in an upright
position. Warm up the engine
for several minutes.
NOTE:
Be sure the motorcycle is posi-
tioned straight up when checking
the oil level. A slight tilt toward the
side can result in false readings.
1. Oil level window
2. Maximum level mark
3. Minimum level mark
a
Installation
1. Measure the electrode gap
with a wire thickness gauge
and, if necessary, adjust the
gap to specification.
2. Clean the gasket surface. Wipe
off any grime from the
threads.
3. Install the spark plug and tight-
en it to the specified torque.
a. Spark plug gap
NOTE:
If a torque wrench is not available
when you are installing a spark
plug, a good estimate of the cor-
rect torque is 1/4 to 1/2 turn past
finger tight. Have the spark plug
tightened to the specified torque as
soon as possible.
4. Install the spark plug caps.
Spark plug gap:
0.6 ~ 0.7 mm
Tightening torque:
Spark plug:
12.5 Nm (1.25 m0kg)
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 40

1
2
3
4
5
6
7
8
9
6-22
PERIODIC MAINTENANCE AND MINOR REPAIR
EW000106
w
8Brake pedal free play should
be checked whenever the
chain is adjusted or the rear
wheel is removed and then
reinstalled.
8Check the operation of the
brake light after adjusting the
rear brake.
8If it is impossible to make
proper adjustment, consult a
Yamaha dealer.
EAU00713Brake light switch
adjustment
The rear brake light switch is acti-
vated by the brake pedal and is
properly adjusted when the brake
light comes on just before braking
takes effect. To adjust the rear
brake light switch, hold the switch
body so it does not rotate while
turning the adjusting nut.
Turn the adjusting nut in direction
ato make the brake light come on
earlier.
Turn the adjusting nut in direction
bto make the brake light come on
later.
1. Brake light switch
2. Adjusting nut
1
2
a
b
EAU00720Checking the front brake
pads and rear brake shoes
EAU00725
Front brake
A wear indicator groove is provid-
ed on each brake pad. This indica-
tor allows checking of brake pad
wear without disassembling the
brake. Inspect the groove. If the
groove has almost disappeared,
ask a Yamaha dealer to replace the
pads.
1. Indicator groove
1
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 53

1
2
3
4
5
6
7
8
9
6-26
PERIODIC MAINTENANCE AND MINOR REPAIR
7. Adjust the free play in the
brake pedal.
EW000103
w
Check the operation of the brake
light after adjusting the rear brake.
1
6. Insert a new cotter pin into the
axle nut and bend the end of
the cotter pin as shown. If the
notch in the axle nut and the
cotter pin hole do not match,
tighten the nut slightly to align
them.
EW000110
w
Always use a new cotter pin on
the axle nut.
1. Cotter pin
EAU00769Drive chain lubrication
The chain consists of many parts
which work with each other. If the
chain is not maintained properly, it
will wear out quickly. Therefore,
the chain must be serviced regular-
ly. This service is especially neces-
sary when riding in dusty areas.
This motorcycle is equipped with a
sealed type chain. Steam cleaning,
high-pressure washes, and sol-
vents can damage chain so do not
use these for cleaning it. Use only
kerosene to clean the drive chain.
Wipe it dry, and thoroughly lubri-
cate it with SAE 30 ~ 50W motor
oil. Do not use any other lubricants
on the drive chain. They may con-
tain solvents that could damage
the sealed chain.
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 57

6-33
1
2
3
4
5
6
7
8
92. Remove the connectors, the
headlight unit and then the
bulb cover.
1. Bulb cover
2. Connector (´2)
1
2
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU00833Headlight bulb replacement
This 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.
1. Screw (´2)
EC000103
cC
Do not use fuses of higher amper-
age rating than those recommend-
ed. Substitution of a fuse of
improper rating can cause exten-
sive electrical system damage and
possibly a fire.
1
Specified fuses:
Main fuse: 20A
Signaling system fuse: 10A
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 64

1
2
3
4
5
6
7
8
9
6-34
PERIODIC MAINTENANCE AND MINOR REPAIR
3. Turn the bulb holder counter-
clockwise to remove it and
remove the defective bulb.
EW000119
w
Keep flammable products and your
hands away from a bulb while it is
on, as it is hot. Do not touch a bulb
until it cools down.
4. Put a new bulb into position
and secure it in place with the
bulb holder.
1. Bulb holder
EC000105
cC
Avoid touching the glass part of a
bulb. Keep it free from oil; other-
wise, the transparency of the
glass, life of the bulb, and lumi-
nous flux will be adversely affect-
ed. If oil gets on a bulb, thoroughly
clean it with a cloth moistened
with alcohol or lacquer thinner.
5. Install the bulb cover, connec-
tors and headlight unit.
Ask a Yamaha dealer to adjust
the headlight beam if neces-
sary.
1. Don’t touch
1
1
1
EAU03010Turn signal light bulb
replacement
1. Remove the screws and the
lens.
1. Screw (´2)
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 65

6-35
1
2
3
4
5
6
7
8
9
1
2. Remove the defective bulb by
pushing it inward and turning
it counterclockwise.
3. Install a new bulb by pushing
it inward and turning it clock-
wise.
4. Install the lense and tighten
the screws.
EC000108
cC
Do not over-tighten the screws as
the lens may break.
1. Bulb
PERIODIC MAINTENANCE AND MINOR REPAIR
1
2. Remove the defective bulb by
pushing it inward and turning
it counterclockwise.
3. Install a new bulb by pushing
it inward and turning it clock-
wise.
4. Install the lens and tighten the
screws.
1. Bulb
1
EAU01623Taillight bulb replacement
1. Remove the screws and the
lense.
1. Screw (´2)
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 66

6-39
1
2
3
4
5
6
7
8
97. Adjust the rear brake pedal
height and free play. (See page
6-21.)
EW000103
w
Check the operation of the brake
light after adjusting the rear brake.
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU01696Rear wheel installation
1. 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 speci-
fied tightening torque. Then
install a new cotter pin.
5. Adjust the drive chain free
play. (See page 6-25.)
6. Tighten the axle nut to the
specified tightening torque. Specified torque:
Brake torque rod bolt:
23 Nm (2.3 m·kg)
Specified torque:
Axle nut:
105 Nm (10.5 m·kg)
435
12
5. Remove the rear brake pedal
free play adjusting nut and
brake rod from the brake cam
lever.
6. Loosen the locknuts and chain
adjusting nuts on each side.
7. Remove the axle nut.
8. Pull out the wheel axle and
remove the wheel assembly.
1. Cotter pin
2. Alignment marks
3. Locknut
4. Chain adjusting nut
5. Axle nut
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 70

1
2
3
4
5
6
7
8
9
MOTORCYCLE CARE AND STORAGE
7-2
8Improper cleaning can damage
windshields, cowlings, panels
and other plastic parts. Use
only a soft, clean cloth or
sponge with mild detergent
and water to clean plastic.
8Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
contact with strong or abra-
sive cleaning products, solvent
or thinner, fuel (gasoline), rust
removers or inhibitors, brake
fluid, antifreeze or electrolyte.8Do not use high-pressure
washers or steam-jet cleaners
since they cause water seep-
age and deterioration in the
following areas: seals (of
wheel bearings, swingarm
bearings, forks and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.
8For motorcycles equipped
with a windshield: Do not use
strong cleaners or hard
sponges as they will cause
dulling or scratching. Some
cleaning compounds for plas-
tic may leave scratches on the
windshield. Test the product
on a small hidden part of the
windshield to make sure they
do not leave any marks. If the
windshield is scratched, use a
quality plastic polishing com-
pound after washing.After riding in the rain, near the
sea or on salt-sprayed roads
Since sea salt or salt sprayed on
the roads in the winter are
extremely corrosive in combina-
tion with water, carry out the fol-
lowing steps after each ride in the
rain, near the sea or on salt-
sprayed roads. (Salt sprayed in the
winter may remain on the roads
well into spring.)
1. Clean your motorcycle with
cold water and soap after the
engine has cooled down.
ECA00012
cC
Do not use warm water since it
increases the corrosive action of
the salt.
2. Be sure to apply a corrosion
protection spray on all (even
chrome- and nickel-plated)
metal surfaces to prevent cor-
rosion.
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 74