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the reset button for at least two
second.
The tripmeter can be used together
with the fuel gauge to estimate the
distance that can be traveled with a
full tank of fuel. This information will
enable you to plan future fuel stops.
EAU12140
Fuel gauge
The fuel gauge indicates the amount
of fuel in the fuel tank. The needle
moves towards “E” (Empty) as the
fuel level decreases. When the needle
reaches “E”, refuel as soon as possi-
ble.
NOTE:
Do not allow the fuel tank to empty
itself completely.
EAUS1010
Clock
To set the clock
1. Turn the key to “f”.
2. Set the odometer/tripmeter dis-
play to “TOTAL” by pushing the
“SET” button.3. Push the “SET” button for at least
two seconds.
4. When the hours digits start flas-
hing, push the “SET” button to
set the hours.
5. Push the “SET” button for at least
two seconds and the minutes
digits will start flashing.
6. Push the “SET” button to set the
minutes.
7. Push the “SET” button for at least
two seconds to start the clock
and return to the odometer/trip-
meter mode.
NOTE:
The clock is displayed only when the
key is in the “f” position.
EAU12343
Handlebar switches
1. Horn switch
2. Turn signal switch
3. Dimmer swith
EAU12400
Dimmer switch “j/k”
Set this switch to “j” for the high
beam and to “k” for the low beam.
EAU12440
Turn signal switch “TURN”
To signal a right-hand turn, push this
switch to the right. To signal a left-
hand turn, push this switch to the left.
When released, the switch returns to
the center position. To cancel the turn
signal lights, push the switch in after it
has returned to the center position.
kb
a
3
INSTRUMENT AND CONTROL FUNCTIONS
3-3
13
2
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Page 33 of 56

EAU20060
Final transmission oil
1. Oil filler bolt
The final transmission case must be
checked for oil leakage before each
ride. If any leakage is found, have a
Yamaha dealer check and repair the
scooter. In addition, the final trans-
mission oil must be changed as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
1. Start the engine, warm it up by
riding the scooter for several
minutes, and then stop the engi-
ne.
1. Drain plug
2. Place the scooter on the centers-
tand.
3. Place an oil pan under the final
transmission case to collect the
used oil.
4. Remove the oil filler cap and
drain bolt to drain the oil from the
final transmission case.
5. Install the final transmission oil
drain bolt, and then tighten it to
the specified torque.
6. Add the specified amount of the
recommended final transmissionoil, and then install and tighten
the oil filler cap.
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.
Recommended final transmission
oil:
See page 8-1.
Oil quantity:
0,11 L (0,0003 Imp.qt)
Tightening torque:
Final transmission oil drain bolt:
18 Nm (1,8 m•kgf, 13,2 ft•lbf)
6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
11
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Page 52 of 56

DimensionsOverall length
1740 mm
Overall width
675 mm
Overall height
1065 mm
Seat height
770 mm
Wheelbase
1210 mm
Ground clearance
132 mm
WeightWith oil and fuel
CS50 80.5 kg
CS50Z 83.7 kg
EngineEngine type
CS50 Air cooled 2-stroke
CS50Z Liquid cooled 2-stroke
Cylinder arrangement
Forward-inclined single cylinder
Displacement
49.2 cm3
Bore x stroke
40.0 x 39.2 mm
Compression ratio
CS50 10.20 :1
CS50Z 11.40 :1
Starting system
Electric starter and kickstarter
Lubrication system
Separate lubrication (Yamaha autolube)Type
YAMALUBE 2-cycle oil or 2-stroke engine
oil
Engine oil quantityQuantity
1.4 L
Transmission oilType
YAMALUBE 4 (10W30) or SAE10W30
type SE motor oil
Oil change quantity
0.10 L
Air filter element
Wet element
Fuel
Recommended fuel
Regular unleaded gasoline
Fuel tank capacity
5.5 L
CarburetorManufacturer
CS50 DELLORTO GURTNER
CS50Z DELLORTO
Type x quantity
CS50 PHVA 12 ZS/1 PY 12/1
CS50Z PHVA 12 ZS/1
Spark plug(s)Manufacturer/model
NGK/BR8HS
Spark plug gap
0.6-0.7 mm
Clutch type
Dry, centrifugal automatic
TransmissionPrimary reduction system
Helical gear
Primary reduction ratio
52/13 (4.000)
Secondary reduction system
Spur gear
Secondary reduction ratio
CS50 42/13 (3.230)
CS50Z 43 x 13 (3.310)
Transmission type
Single speed automatic
Operation
Centrifugal automatic type
ChassisCaster angle
25.00 degree
Trail
80.0 mm
Front tireSize
110/70-12 47L
Rear tireSize
120/70-12 51L 130/70-12 56L
Maximum load
CS50 161 kg
CS50Z 158 kg
Tire air pressure (measured on cold
tires)
Front
175 kPa
Rear
200 kPa
8
SPECIFICATIONS
8-1
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Page 53 of 56
Front wheelRim size
MT 2.75X12
Rear wheelRim size
MT 3.00X12
Front brakeType
Single disc brake
Operation
Right hand operation
Recommended fluid
DOT 4
Rear brakeType
Drum brake
Operation
Left hand operation
Front suspensionType
Telescopic fork
Spring/shock absorber type
Coil spring/oil damper
Wheel travel
70.0 mm
Rear suspensionType
Unit swing
Spring/shock absorber type
Coil spring/oil damper
Wheel travel
60.0 mm
Electrical systemIgnition systemCDI
Charging system
Flywheel magneto
BatteryModel
GT4L-BS
Voltage, capacity
12 V, 4.0 Ah
Bulb voltage, wattage x quantityHeadlight
12 V, 35 W/35.0 W x 1
Tail/brake light
12 V, 21.0 W/5.0 W x 1
Front turn signal light
12 V, 16.0 W x 2
Rear turn signal light
12 V, 10.0 W x 2
Meter lighting
12 V, 1.2 W x 2
Oil level warning light
LED
Fuel level warning light
NONE
FusesMain fuse
7.5 A
8
SPECIFICATIONS
8-2
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EAU26351
Identification numbers
Record the key identification number,
vehicle identification number and
model label information in the spaces
provided below for assistance when
ordering spare parts from a Yamaha
dealer or for reference in case the
vehicle is stolen.
KEY IDENTIFICATION NUMBER:
VEHICLE IDENTIFICATION NUMBER:
MODEL LABEL INFORMATION:
EAU26381
Key identification number
The key identification number is
stamped into the key tag.Record this
number in the space provided and
use it for reference when ordering a
new key.
EAU26410
Vehicle identification number
1. Vehicle identification number
The vehicle identification number is
stamped into the frame.
NOTE:
The vehicle identification number is
used to identify your motorcycle and
may be used to register your
motorcycle with the licensing autho-
rity in your area.
EAU26540
Model label
1. Model label
The model label is affixed to the frame
under the seat. (See page 3-6.)
Record the information on this label in
the space provided. This information
will be needed when ordering spare
parts from a Yamaha dealer.
9
CONSUMER INFORMATION
9-1
1
1
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