light YAMAHA TW125 2000 User Guide

5-5
OPERATION AND IMPORTANT RIDING POINTS
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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.
EAU01128Engine break-in
There is never a more important
period in the life of your motorcy-
cle than the period between zero
and 1,600 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 1,600 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.
EAU015000 ~ 1,000 km
Avoid operation above 1/3 throttle.
1,000 ~ 1,600 km
Avoid cruising speeds in excess of
1/2 throttle.
EC000057
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After 1,000 km of operation, be
sure to replace the engine oil and
clean the oil filter element and oil
strainer.
1,600 km and beyond
Proceed with normal riding.
EC000049
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If any engine trouble should occur
during the break-in period, consult
a Yamaha dealer immediately.
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6-8
PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU01833Spark plug
Removal
1. Remove the spark plug cap.
2. Use the spark plug wrench in
the tool kit to remove the spark
plug 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.
The ideal color on the white insula-
tor around the center electrode is a
medium-to-light tan color for a
motorcycle that is being ridden
normally.
Do not attempt to diagnose such
problems yourself. Instead, take
the motorcycle to a Yamaha deal-
er. You should periodically remove
and inspect the spark plug because
heat and deposits will cause any
spark plug to slowly break down
and erode. If electrode erosion
becomes excessive, or if carbon
and other deposits are excessive,
you should replace the spark plug
with the specified plug.
Specified spark plug:
DR8EA (NGK)
12
1
EAU01145Cowling C
To remove
Remove the cowling screw and
pull outward on the areas shown.
To install
Place in the original position and
install the screw.
1. Cowling C
2. Screw
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6-9
PERIODIC MAINTENANCE AND MINOR REPAIR
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1
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.
1. 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 cap.
EAU00517*
Engine oil
Oil level measurement
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.
Spark plug gap:
0.6 ~ 0.7 mm
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kg)
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6-21
PERIODIC MAINTENANCE AND MINOR REPAIR
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ba
Free play
The rear brake pedal free play
should be adjusted to 20 ~ 30 mm
at the brake pedal end. Turn the
adjusting nut on the brake rod in
direction ato increase free play or
in direction bto decrease free
play.
1. Adjusting nut
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.
1
2
a
b
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
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6-25
PERIODIC MAINTENANCE AND MINOR REPAIR
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EC000096
cC
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
w
Check the operation of the brake
light after adjusting the rear brake.
EAU01106*Drive 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.
The drive chain should be lubri-
cated every 500 km. First, remove
all dirt and mud from the chain
with a brush or cloth. Then, spray
any of the many brands of spray-
type chain lubricant between
both rows of side plates and on
all center rollers.
To clean the chain thoroughly,
remove it from the motorcycle,
dip it in solvent, and clean out as
much dirt as possible. Then, take
the chain out of the solvent to
dry it, and immediately lubricate
it to prevent it from rusting.
EC000097
cC
Be sure to oil the chain after wash-
ing the motorcycle or riding in the
rain.
Tightening torque:
Wheel axle nut:
90 Nm (9.0 m·kg)
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6-32
PERIODIC MAINTENANCE AND MINOR REPAIR
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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.
EAU01158Headlight bulb replacement
If the headlight bulb burns out,
replace the bulb as follows:
1. Remove cowling C. (See page
6-8 for removal and installa-
tion procedures.)
2. Remove the headlight unit by
removing the bolts.
1. Bolt (´2)
3. Remove the headlight connec-
tor and the bulb holder cover.
1. Connector
2. Bulb holder cover
1
1
2
Specified fuse: 20A
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6-33
PERIODIC MAINTENANCE AND MINOR REPAIR
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9 4. Turn the bulb holder counter-
clockwise to remove it and
then 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.
5. Put a new bulb into position
and secure it in place with the
bulb holder.
1. Bulb holder
6. Install the bulb holder cover,
connector and headlight unit.
7. Install the cowling.
8. If the headlight beam adjust-
ment is necessary, ask a
Yamaha dealer to make that
adjustment.EAU00855Turn signal and taillight bulb
replacement
1. Remove the screws and the
lens.
1. Screw
11
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6-37
PERIODIC MAINTENANCE AND MINOR REPAIR
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9 3. Turn the chain adjusting plates
on each side fully in direction
b.
4. Elevate the rear wheel.
5. Remove the axle nut.
6. Pull out the rear axle.
7. Push the wheel forward and
remove the drive chain.
8. Remove the wheel assembly.
EAU01497Rear wheel installation
1. Install the wheel assembly and
insert the axle from the left-
hand side. Be sure that the
chain adjusting plates are
installed with the punched side
outward and the slot in the
brake shoe plate fits over the
stopper on the swingarm.
2. Install and adjust the drive
chain. (See page 6-24 for
details about adjusting the
drive chain slack.)
3. Install the axle nut and let the
motorcycle down.4. Tighten the axle nut to the
specified torque.
5. Insert the brake rod into the
brake cam lever and install the
brake pedal free play adjusting
nut.
6. Adjust the rear brake pedal
free play. (See page 6-20.)EW000103
w
Check the operation of the brake
light after adjusting the rear brake.
Tightening torque:
Axle nut:
90 Nm (9.0 m·kg)
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7-2
MOTORCYCLE CARE AND STORAGE
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9 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
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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.
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Headlight bulb typeIncandescence
Bulb voltage, wattage ´quantity
Headlight 12 V, 45 W/40 W ´1
Stop/tail light 12 V, 21 W/5 W ´1
Front flasher light 12 V, 21 W ´2
Rear flasher light 12 V, 21 W ´2
Marker light 12 V, 4 W ´1
Meter light 12 V, 3.4 W ´1
Neutral indicator light 12 V, 3.4 W ´1
High beam indicator light 12 V, 3.4 W ´1
Turn indicator light 12 V, 3.4 W ´1
Fuse
Main 20 A
SPECIFICATIONS
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