SAFETY INFORMATION.....................1-1
DESCRIPTION.....................................2-1
Left view ...........................................2-1
Right view .........................................2-2
Controls and instruments .................2-3
INSTRUMENT AND CONTROL
FUNCTIONS........................................3-1
Main switch/steering lock .................3-1
Indicator lights ..................................3-1
Speedometer unit .............................3-2
Fuel gauge ........................................3-3
Clock .................................................3-3
Handlebar switches ..........................3-3
Front brake lever...............................3-4
Rear brake lever................................3-4
Fuel and 2-stroke engine oil tank
caps ...............................................3-4
Fuel ...................................................3-5
2-stroke engine oil ............................3-5
Kickstarter.........................................3-6
Seat...................................................3-6
Storage compartment.......................3-6
PRE-OPERATION CHECKS...............4-1
Pre-operation check list....................4-2
OPERATION AND IMPORTANT RIDING
POINTS................................................5-1
Starting a cold engine ......................5-1Starting off ........................................5-1
Acceleration and deceleration ..........5-2
Braking..............................................5-2
Engine break-in.................................5-2
Parking ..............................................5-2
PERIODIC MAINTENANCE AND
MINOR REPAIR...................................6-1
Periodic maintenance and
lubrication chart ............................6-2
Checking the spark plug ..................6-5
Final transmission oil ........................6-6
Coolant (only for liquid-cooled
models) ..........................................6-6
Cleaning the air filter element ...........6-8
Adjusting the carburetor ...................6-9
Adjusting the throttle cable free
play ................................................6-9
Tires ..................................................6-9
Adjusting the brake lever free
play ..............................................6-11
Adjusting the rear brake lever free
play ..............................................6-11
Checking the front brake pads
and rear brake shoes ..................6-12
Checking the front brake fluid
level .............................................6-13
Changing the brake fluid ................6-13
Checking and lubricating the
cables ..........................................6-13Checking and lubricating the
throttle grip and cable .................6-14
Adjusting the Autolube pump .........6-14
Lubricating the front and rear
brake levers .................................6-14
Checking and lubricating the
centerstand .................................6-14
Checking the front fork ...................6-15
Checking the steering.....................6-15
Checking the wheel bearings .........6-15
Replacing the headlight bulb or a
front turn signal light bulb ...........6-16
Replacing a turn signal light bulb
or the tail/brake light bulb ...........6-16
Replacing the license plate light
bulb .............................................6-17
Battery ............................................6-17
Replacing the fuse ..........................6-18
Troubleshooting ..............................6-19
Troubleshooting chart .....................6-20
SCOOTER CARE AND STORAGE.....7-1
Care ..................................................7-1
Storage .............................................7-3
SPECIFICATIONS...............................8-1
CONSUMER INFORMATION.............9-1
Identification numbers ......................9-1
TABLE OF CONTENTS
5RW-F8199-E3.qxd 08/09/2005 18:07 Página 7
EAU11030
Turn signal indicator lights “c” and
“d”
The corresponding indicator light flas-
hes when the turn signal switch is
pushed to the left or right.
EAU11080
High beam indicator light “j”
This indicator light comes on when
the high beam of the headlight is swit-
ched on.
EAU11130
2-stroke engine oil level warning
light “z”
This warning light comes on when the
2-stroke engine oil level is low.
The electrical circuit of the warning
light can be checked according to the
following procedure.
1. Turn the key to “ON”.
2. Shift the transmission into the
neutral position.
3. If the warning light does not
come on, have a Yamaha dealer
check the electrical circuit.
ECA11570
CAUTION
Do not operate the motorcycle until
you know that the 2-stroke engine
oil level is sufficient.
NOTE:
Even if the 2-stroke engine oil level is
sufficient, the warning light may flic-
ker when riding on a slope or during
sudden acceleration or deceleration,
but this is not a malfunction.
EAU11430
Coolant temperature warning light
“y”
This warning light comes on when the
engine overheats. When this occurs,
stop the engine immediately and
allow the engine to cool.
ECA10020
CAUTION
Do not operate the engine if it is
overheated.
EAUM1090
Speedometer unit
1. Speedometer unit
2. Fuel gauge
3. Clock
4. Odometer (TOTAL/TRIP)
5. “TRIP” button
The speedometer unit is equipped
with a speedometer, an odometer and
a tripmeter. The speedometer shows
riding speed. The odometer shows
the total distance traveled. The trip-
meter shows the distance traveled
since it was last set to zero.
Pushing the reset button switches the
display between the odometer mode
“TOTAL” and the tripmeter mode
“TRIP”. To reset the tripmeter, enter
the “TRIP” mode, and then hold down
j
d
z
c4050
30
10 2060
70
80
0
y
00000.0
23:08TOTALExF
3
INSTRUMENT AND CONTROL FUNCTIONS
3-2
14
3
2 5
5RW-F8199-E3.qxd 08/09/2005 18:07 Página 16
EAU15603
Pre-operation check list
PRE-OPERATION CHECKS
4-2
4
ITEM CHECKS PAGE
• Check fuel level in fuel tank.
Fuel• Refuel if necessary. 3-3, 3-4
• Check fuel line for leakage.
• Check oil level in oil tank.
2-stroke engine oil• If necessary, add recommended oil to specified level. 3-4, 3-5
• Check vehicle for oil leakage.
Transmission oil• Check oil level in transmission case.
• If necessary, add recommended oil to specified level.6-6
• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
• Check brake pads for wear.
Front brake• Replace if necessary. 3-4, 6-11, 6-12, 6-13
• Check fluid level in reservoir.
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.
• Check operation.
Rear brake• Lubricate cable if necessary.
3-4, 6-11, 6-12
• Check lever free play.
• Adjust if necessary.
• Make sure that operation is smooth.
Throttle grip• Check cable free play.
6-9, 6-14
• If necessary, have Yamaha dealer adjust cable free play and lubricate cable
and grip housing.
• Check for damage.
Wheels and tires• Check tire condition and tread depth.
6-9, 6-15
• Check air pressure.
• Correct if necessary.
Brake levers• Make sure that operation is smooth.
• Lubricate lever pivoting points if necessary.3-4, 6-11, 6-14
Centerstand• Make sure that operation is smooth.
• Lubricate pivot if necessary.6-14
5RW-F8199-E3.qxd 08/09/2005 18:07 Página 23
ODOMETER READING (x 1000 Km) ANNUAL
NOITEM CHEK OR MAINTENANCE JOB 1 6 12 18 24CHECK
9*Wheel bearings• Check bearing for looseness or damage.√√√√
10 *Steering bearings• Check bearing play and steering for roughness.√√ √ √√• Lubricate with lithium-soap-based grease. Every 24000 km
11 *Chassis fasteners• Make sure that all nuts, bolts and screws are
properly tightened.√√√√ √
12Centerstand• Check operation.
• Lubricate.√√√√ √
13 *Front fork• Check operation and for oil leakage.√√√√
14 *Shock absorber
• Check operation and shock absorber for oil leakage.√√√√
assembly
15 *Carburetor• Adjust engine idling speed.√√ √ √√ √
16 *Autolube pump• Check operation.
• Bleed if necessary.√√√√
17 *Cooling system• Check coolant level and vehicle for coolant leakage.√√√√ √• Change. Every 3 years
18Final transmission • Check vehicle for oil leakage.√√ √oil
• Change.√√√
19 *V-belt• Replace. Every 12000 km
20 *Front and rear brake
• Check operation.√√ √ √√ √
switches
21Moving parts and
• Lubricate.√√√√ √
cables
22 *Lights, signals • Check operation.
and switches• Adjust headlight beam.√√ √ √√ √
PERIODIC MAINTENANCE AND MINOR REPAIR
6-3
6
5RW-F8199-E3.qxd 08/09/2005 18:07 Página 30
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
5RW-F8199-E3.qxd 08/09/2005 18:07 Página 33
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
5RW-F8199-E3.qxd 08/09/2005 18:07 Página 52
22-stroke engine oil .....................................3-5
AAcceleration and deceleration ...................5-2
Adjusting the Autolube pump ..................6-14
Adjusting the brake lever free play ..........6-11
Adjusting the carburetor ............................6-9
Adjusting the rear brake lever free play ...6-11
Adjusting the throttle cable free play .........6-9
BBattery......................................................6-17
Braking .......................................................5-2
CCare............................................................7-1
Changing the brake fluid..........................6-13
Checking and lubricating the cables .......6-13
Checking and lubricating the
centerstand ............................................6-14
Checking and lubricating the throttle
grip and cable ........................................6-14
Checking the front brake fluid level .........6-13
Checking the front brake pads and rear
brake shoes ...........................................6-12
Checking the front fork ............................6-15
Checking the spark plug ............................6-5
Checking the steering ..............................6-15
Checking the wheel bearings ..................6-15
Cleaning the air filter element ....................6-8
Clock ..........................................................3-3
Controls and instruments ..........................2-3
Coolant (only for liquid-cooled models).....6-6
EEngine break-in ..........................................5-2
FFinal transmission oil .................................6-6
Front brake lever ........................................3-4
Fuel ............................................................3-5
Fuel and 2-stroke engine oil tank caps .....3-4
Fuel gauge .................................................3-3
HHandlebar switches ...................................3-3
IIdentification numbers ...............................9-1
Indicator lights ...........................................3-1
KKickstarter ..................................................3-6
LLeft view .....................................................2-1
Lubricating the front and rear brake
levers .....................................................6-14
MMain switch/steering lock ..........................3-1
PParking .......................................................5-2
Periodic maintenance and lubrication
chart .........................................................6-2
Pre-operation check list .............................4-2
RRear brake lever .........................................3-4
Replacing a turn signal light bulb or the
tail/brake light bulb ................................6-16
Replacing the fuse ...................................6-18
Replacing the headlight bulb or a front
turn signal light bulb ..............................6-16
Replacing the license plate light bulb......6-17
Right view ..................................................2-2
SSeat ............................................................3-6
Speedometer unit ......................................3-2
Starting a cold engine ................................5-1
Starting off .................................................5-1
Storage.......................................................7-3
Storage compartment ................................3-6
TTires ...........................................................6-9
Troubleshooting .......................................6-19
Troubleshooting chart ..............................6-20
INDEX
5RW-F8199-E3.qxd 08/09/2005 18:07 Página 55