Page 32 of 72

EAU15980
EWA10870
s s
WARNING
●Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer
regarding any control or func-
tion that you do not thoroughly
understand.
●Never start the engine or ope-
rate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of cons-
ciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.
●For safety, always start the
engine with the centerstand
down.
EAU16561
Starting a cold engineECA10250
CAUTION:
See page 5-4 for engine break-in
instructions prior to operating the
vehicle for the first time.
1. Turn the key to “h”, and when
the oil level warning light comes
on, turn it to “f”.
ECA10240
CAUTION:
If the oil level warning light does
not come on, have a Yamaha dealer
check the electrical circuit.
2. Close the throttle completely.
3. While applying the front or rear
brake, start the engine by pus-hing the start switch or by pus-
hing the kickstarter lever down.
NOTE:
If the engine fails to start by pushing
the start switch, release the switch,
wait a few seconds, and then try
again. Each starting attempt should
be as short as possible to preserve
the battery. Do not crank the engine
more than 5 seconds on any one
attempt. If the engine does not start
with the starter motor, try using the
kickstarter.
ECA11040
CAUTION:
For maximum engine life, never
accelerate hard when the engine is
cold!
ZAUM0367
m
OPERATION AND IMPORTANT RIDING POINTS
5-1
5
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EAU16792
Braking
1. Close the throttle completely.
2. Apply both front and rear brakes
simultaneously while gradually
increasing the pressure.
EWA10300
s s
WARNING
●Avoid braking hard or suddenly
(especially when leaning over
to one side), otherwise the sco-
oter may skid or overturn.
●Railroad crossings, streetcar
rails, iron plates on road cons-
truction sites, and manhole
covers become extremely slip-
pery when wet. Therefore, slow
down when approaching suchareas and cross them with cau-
tion.
●Keep in mind that braking on a
wet road is much more difficult.
●Ride slowly down a hill, as bra-
king downhill can be very diffi-
cult.
EAU16820
Tips for reducing fuel
consumption
Fuel consumption depends largely on
your riding style. Consider the follo-
wing tips to reduce fuel consumption:
●Avoid high engine speeds during
acceleration.
●Avoid high engine speeds with no
load on the engine.
●Turn the engine off instead of let-
ting it idle for an extended length
of time (e.g., in traffic jams, at
traffic lights or at railroad cros-
sings).
OPERATION AND IMPORTANT RIDING POINTS
5-3
5
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Page 39 of 72
PERIODIC MAINTENANCE AND MINOR REPAIR
6-4
6
ODOMETER READING
ANNUAL
NO. ITEM CHECK OR MAINTENANCE JOB
1000 km 6000 km 12000 km 18000 km 24000 kmCHECK
(600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi)
21 *V-belt• Replace. Every 10000 km (6000 mi)
22 *Front and rear brake
• Check operation.√√√√√ √
switches
23Moving parts and cables• Lubricate.√√√√ √
Throttle grip housing • Check operation and free play.
24 * • Adjust the throttle cable free play if necessary.√√√√ √
and cable
• Lubricate the throttle grip housing and cable.
25 *Lights, signals • Check operation.
and switches• Adjust headlight beam.√√√√√ √
EAUM2070
NOTE:
●The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
●Hydraulic brake service
• Regularly check and, if necessary, correct the brake fluid level.
• Every two years change the brake fluid.
• Replace the brake hoses every four years and if cracked or damaged.
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Page 40 of 72
EAU18740
Removing and installing the
cowling and panel
1. Cowling
1. Panel A
The cowling and panel shown above
need to be removed to perform some
of the maintenance jobs described inthis chapter. Refer to this section
each time a cowling or panel needs to
be removed and installed.
EAUT1140
Cowling A
T
o remove the cowling
1. Remove the cowling screws.
1. Cowling
2. Screw
2. Disconnect the headlight coupler,
the turn signal lead couplers, and
the auxiliary light lead coupler.
1. Headlight coupler
2. Auxiliary light lead coupler
3. Turn signal light lead coupler
3. Pull the cowling off as shown.
T
o install the cowling
1. Connect the headlight coupler,
the turn signal lead couplers, and
the auxiliary light lead coupler.
2. Place the cowling in the original
position, and then install the
screws.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-5
6
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EAUM1250
Panel A
T
o remove the panel
1. Open the storage compartment.
(See page 3-11.)
2. Remove the screw, and then take
the panel off.
1. Screw
2. Panel
To install the panel
1. Place the panel in the original
position, and then install the
screw.
2. Close the storage compartment.
EAU19621
Checking the spark plug
1. Spark plug gap
The spark plug is an important engine
component, which should be chec-
ked periodically, preferably by a
Yamaha dealer. Since heat and depo-
sits will cause any spark plug to
slowly erode, it should be removed
and checked in accordance with the
periodic maintenance and lubrication
chart. In addition, the condition of the
spark plug can reveal the condition of
the engine.
The porcelain insulator around the
center electrode of the spark plug
should be a medium-to-light tan (the
ideal color when the vehicle is riddennormally). If the spark plug shows a
distinctly different color, the engine
could be operating improperly. Do not
attempt to diagnose such problems
yourself. Instead, have a Yamaha
dealer check the vehicle.
If the spark plug shows signs of elec-
trode erosion and excessive carbon
or other deposits, it should be repla-
ced.
Before installing a spark plug, the
spark plug gap should be measured
with a wire thickness gauge and, if
necessary, adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
Spark plug gap:
0.6-0.7 mm (0.024-0.028 in)
Specified spark plug:
BR8HS/NGK (for CS50 CS50Z)
BPR4HS/NGK (for CS50M)
1
ZAUM0037
PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6
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Page 43 of 72

EWA11310
s s
WARNING
●Make sure that no foreign
material enters the final trans-
mission case.
●Make sure that no oil gets on
the tire or wheel.
7. Check the final transmission case
for oil leakage. If oil is leaking,
check for the cause.
EAUS1200
Coolant (only for liquid-
cooled models)
The coolant level should be checked
before each ride. In addition, the coo-
lant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUM2101
To check the coolant level
1. Place the vehicle on a level surfa-
ce and hold it in an upright posi-
tion.
NOTE:
●The coolant level must be chec-
ked on a cold engine since the
level varies with engine tempera-
ture.
●Make sure that the vehicle is
positioned straight up when
checking the coolant level. A
slight tilt to the side can result in
a false reading.
2. Check the coolant level through
the check window.
NOTE:
The coolant should be between the
minimum and maximum level marks.
1. Coolant level window
2. Maximum level mark
3. Minimum level mark
3. If the coolant is at or below the
minimum level mark, remove the
cowling A. (See page 6-5.)
4. Open the reservoir cap, and then
add coolant to the maximum
level mark.
Coolant reservoir capacity:
0.25 L (0.26 US qt) (0.22 Imp.qt)
Recommended final transmission
oil:
See page 8-1.
Oil quantity:
0.11 L (0.12 US qt) (0.10 Imp.qt)
PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
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EAUS1430
Replacing the headlight bulb
or a front turn signal light
bulb
If a bulb burns out, replace it as
follows.
ECA10670
CAUTION:
It is advisable to have a Yamaha
dealer perform this job.
Headlight bulb
1. Remove cowling A.
2. Disconnect the headlight leads,
and then unhook the headlight
bulb holder as shown.
1. Headlight couplers
2. Headlight bulb holder
3. Remove the bulb holder by
pulling it and then, remove the
defective bulb by turning it coun-
terclockwise.
1. Bulb holder
2. Push in and turn counterclockwise.
3. Remove the bulb.
4. Headlight bulb
EWA10790
s s
WARNING
Headlight bulbs get very hot. The-
refore, keep flammable products
away from a lit headlight bulb, and
do not touch the bulb until it has
cooled down.
4. Insert a new headlight bulb into
the bulb holder and turn it clock-
wise.
5. Place the bulb holder in its origi-
nal position, and then secure it
with its holder as shown.
6. Connect the headlight leads and
install the cowling.
7. Have a Yamaha dealer adjust the
headlight beam if necessary.
GGYYBB
1 2
3
4
GYB
1
2
PERIODIC MAINTENANCE AND MINOR REPAIR
6-21
6
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Left turn signal light bulb
1. Remove cowling A.
2. Remove the socket (together
with the bulb) by turning it coun-
terclockwise.
1. Socket
3. Remove the defective bulb from
the socket by pulling it out.
1. Turn signal light bulb
4. Insert a new bulb into the socket.
5. Install the socket by turning it
clockwise.
6. Install the cowling.
Right turn signal light bulb
1. Remove cowling A.
2. Remove the socket (together
with the bulb) by turning it clock-
wise.
1. Socket
3. Remove the defective bulb from
the socket by pulling it out.
4. Insert a new bulb into the socket.
5. Install the socket by turning
counterclockwise.
6. Install the cowling.
EAUS1250
Replacing the tail/brake light
bulb or a rear turn signal
light bulb
Tail/brake light bulb
1. Remove the tail/brake light bulb
lens by removing the screws.
1. Screws
2. Tail/brake light lens
2. Remove the defective bulb by
pushing it in and turning it coun-
terclockwise.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6
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