2000 YAMAHA TW125 light

5-3
OPERATION AND IMPORTANT RIDING POINTS
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9 1. Turn the fuel cock to “ON”.
2. Turn the main switch to “ON”
and the engine stop switch to
“#”.
3. Shift the transmission into
neutral.
NOTE:
When the transmission is in neu-
tral, the neutral indicator light
should be on. If the light does not
come on, ask a Yamaha dealer to
inspect it.
4. Turn on the starter (choke) and
completely close the throttle
grip.5. Start the engine by pushing
the start switch.
NOTE:
If the engine fails to start, release
the start switch, wait a few sec-
onds, then try again. Each attempt
should be as short as possible to
preserve the battery. Do not crank
the engine more than 10 seconds
on any one attempt.
6. After starting the engine, move
the starter (choke) to the
halfway position.
NOTE:
For maximum engine life, never
accelerate hard with a cold engine!
7. After warming up the engine,
turn off the starter (choke)
completely.
NOTE:
The engine is warm when it
responds normally to the throttle
with the starter (choke) turned off.
ONFUEL
RES
OFF
ON
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EAU01258Starting a warm engine
The starter (choke) is not required
when the engine is warm.
EC000046
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See the “Engine break-in” section
prior to operating the motorcycle
for the first time.
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8Do not coast for long periods
with the engine off, and do
not tow the motorcycle a long
distance. Even with gears in
neutral, the transmission is
only properly lubricated when
the engine is running.
Inadequate lubrication may
damage the transmission.
8Always use the clutch when
changing gears. The engine,
transmission, and driveline are
not designed to withstand the
shock of forced shifting and
can be damaged by shifting
without using the clutch.
1
N5
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2
1
EAU00423Shifting
The transmission lets you control
the amount of power you have
available at a given speed for start-
ing, accelerating, climbing hills,
etc. The use of the shift pedal is
shown in the illustration.
To shift into neutral, depress the
shift pedal repeatedly until it reach-
es the end of its travel, then raise
the pedal slightly.
1. Shift pedal
N. Neutral
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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.
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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.
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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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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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PERIODIC MAINTENANCE AND MINOR REPAIR
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1
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
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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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PERIODIC MAINTENANCE AND MINOR REPAIR
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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.
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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.
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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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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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