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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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
Engine idle speed
1800-2200 r/min
Brake pad lining thickness-inner
4.0 mm
Limit
0.8 mm
Brake pad lining thickness-outer
4.0 mmLimit
0.8 mm
Front brake lever free play
2.0-5.0 mm
Rear brake lever free play
10.0-20.0 mm
8
SPECIFICATIONS
8-2
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22-Stroke engine oil .....................................1-1
AAcceleration and deceleration ...................2-1
Adjusting the autolube pump ....................2-1
Adjusting the carburetor ............................2-2
Adjusting the front brake lever free play....2-3
Adjusting the rear brake lever free play .....3-1
Adjusting the throttle cable free play .........3-1
BBattery........................................................3-1
Braking .......................................................3-2
CCare............................................................3-3
Changing the brake fluid............................3-3
Checking and lubricating the cables .........3-3
Checking and lubricating the centerstand.3-4
Checking and lubricating the throttle
grip and cable ..........................................3-4
Checking the front brake fluid level ...........3-4
Checking the front fork ..............................3-5
Checking the spark plug ............................3-6
Checking the steering ................................3-6
Checking the wheel bearings ....................3-6
Cheking the front brake pads and
rear brake shoes ......................................4-1
Cleaning the air filter element ....................4-2
Clock ..........................................................5-1
Controls and instruments ..........................5-1
Coolant (only for liquid-cooled models) ...5-2
EEngine break-in ..........................................5-2
FFinal transmission oil .................................5-2Front brake lever ........................................6-1
Fuel and 2 stroke engine oil tank caps......6-2
Fuel gauge .................................................6-5
HHandlebar switches ...................................6-6
IIndicator lights ...........................................6-6
KKickstarter ..................................................6-8
LLeft view .....................................................6-9
Lubricating the front and rear brake
levers .......................................................6-9
M
Main switch/steering lock ..........................6-9
PParking .....................................................6-11
Periodic maintenance and lubrication
chart .......................................................6-12
Pre-operation check list ...........................6-13
RRear brake lever .......................................6-14
Replacing a turn signal light bulb or
the tail/brake light bulb ..........................6-14
Replacing the fuse ...................................6-14
Replacing the headlight bulb or a
front turn signal light bulb .....................6-14
Replacing the license plate light bulb......6-15
Right view ................................................6-15
SSeat ..........................................................6-16
Speedometer unit ....................................6-17
Starting a cold engine ..............................6-18
Starting off ...............................................6-19Storage compartment ..............................6-20
Storage compartment ................................7-1
TTires ...........................................................7-1
To check the coolant level .........................7-3
Troubleshooting .........................................8-1
Troubleshooting chart ................................9-1
INDEX
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