●Do not run engine indoors. Even
if you try to ventilate engine
exhaust with fans or open win-
dows and doors, carbon monoxi-
de can rapidly reach dangerous
levels.
●Do not run engine in poorly venti-
lated or partially enclosed areas
such as barns, garages, or car-
ports.
●Do not run engine outdoors whe-
re engine exhaust can be drawn
into a building through openings
such as windows and doors.
Loading
Adding accessories or cargo to your
scooter can adversely affect stability
and handling if the weight distribution
of the scooter is changed. To avoid
the possibility of an accident, use
extreme caution when adding cargo
or accessories to your scooter. Use
extra care when riding a scooter that
has added cargo or accessories.
Here, along with the information
about accessories below, are some
general guidelines to follow if loading
cargo to your scooter:The total weight of the operator, pas-
senger, accessories and cargo must
not exceed the maximum load limit.
Operation of an overloaded vehicle
could cause an accident.
When loading within this weight limit,
keep the following in mind:
●Cargo and accessory weight
should be kept as low and close
to the scooter as possible. Secu-
rely pack your heaviest items as
close to the center of the vehicle
as possible and make sure to dis-
tribute the weight as evenly as
possible on both sides of the
scooter to minimize imbalance or
instability.
●Shifting weights can create a
sudden imbalance. Make sure
that accessories and cargo are
securely attached to the scooter
before riding. Check accessory
mounts and cargo restraints fre-
quently.
●Properly adjust the suspension
for your load (suspension-adjus-
table models only), and check the
condition and pressure of your
tires.
●Never attach any large or heavy
items to the handlebar, front fork,
or front fender. Such items can
create unstable handling or a
slow steering response.
●This vehicle is not designed to
pull a trailer or to be attached
to a sidecar.
Genuine Yamaha Accessories
Choosing accessories for your vehicle
is an important decision. Genuine
Yamaha accessories, which are avai-
lable only from a Yamaha dealer, have
been designed, tested, and approved
by Yamaha for use on your vehicle.
Many companies with no connection
to Yamaha manufacture parts and
accessories or offer other modifica-
tions for Yamaha vehicles. Yamaha is
not in a position to test the products
that these aftermarket companies
produce. Therefore, Yamaha can neit-
her endorse nor recommend the use
of accessories not sold by Yamaha or
Maximum load:
CS50 169 kg (373 lb)
CS50M 169 kg (373 lb)
CS50Z 166 kg (366 lb)
1
SAFETY INFORMATION
1-3
EAUS1424
Multi-function display
1. Select button
2. Odometer/tripmeter
3. Clock
4. Fuel meter
EWA12312
sWARNING
Be sure to stop the vehicle before
making any setting changes to the
multi-function display. Changing
settings while riding can distract
the operator and increase the risk
of an accident.
The multi-function display is equip-
ped with the following:
●a digital clock
●an odometer (which shows the
total distance traveled)
●a tripmeter (which shows the dis-
tance traveled since it was last
set to zero)
●a fuel gauge
●a self-diagnosis device
●a function button (which selects,
sets and resets various modes of
the multi-function display)
TIP
●Be sure to turn the key to “ ”
before using the button.
●For the U.K. only: The odometer
and tripmeter are displayed in
miles.
To set the clock:
1. Select the odometer and push
the button for at least two
seconds.
2. When the hour digits start flas-
hing, push the button to set the
hours.3. To change the ten-minute digit,
push the button for at least two
seconds.
4. When the ten-minute digit starts
flashing, push the button to set it.
5. To change the one-minute digit,
push the button for at least two
seconds.
km/h
01020304050607080
1
43 2
INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
6. When the one-minute digit starts
flashing, push the button to set it.
7. Push the button for at least two
seconds to start the clock.
TIP
After setting the clock, be sure to
push the button for at least two
seconds before turning the key to
“ ”, otherwise the clock will not be
set.
Odometer and tripmeter modes
Pushing the button switches the dis-
play between the odometer mode
“ODO” and the tripmeter “TRIP” in
the following order:
ODO TRIP ODO
1. Odometer
2. Tripmeter
To reset the tripmeter, select it by
pushing the button, and then push it
again for at least two seconds.
Fuel gauge
The fuel gauge indicates the amount
of fuel in the fuel tank. The display
segments of the fuel gauge disappear
towards “E” (Empty) as the fuel level
decreases. When only one segment is
left near “E”, refuel as soon as possi-
ble.
Self-diagnosis device
This model is equipped with a self-
diagnosis device for the fuel electrical
circuit.
If a problem is detected in the fuel
electrical circuit, all LCD segments ofthe fuel gauge will flash. If this occurs,
have a Yamaha dealer check the vehi-
cle.
PRESS
BUTTON
PRESS
BUTTON
INSTRUMENT AND CONTROL FUNCTIONS
3-5
3
eyes, see your doctor immediately.
If gasoline spills on your skin, wash
with soap and water. If gasoline
spills on your clothing, change your
clothes.
EAU13270
Your Yamaha engine has been desig-
ned to use regular unleaded gasoline
with a research octane number of 91
or higher. If knocking (or pinging)
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark
plug life and reduce maintenance
costs.
EAU13432
Catalytic converter
This model is equipped with a cataly-
tic converter in the exhaust system.
EWA10861
sWARNING
The exhaust system is hot after
operation. To prevent a fire hazard
or burns:
●Do not park the vehicle near
possible fire hazards such as
grass or other materials that
easily burn.
●Park the motorcycle in a place
where pedestrians or children
are not likely to touch the hot
exhaust system.
●Make sure that the exhaust
system has cooled down befo-
re doing any maintenance
work.
●Do not allow the engine to idle
more than a few minutes. Long
idling can cause a build-up of
heat.
ECA10701
NOTICE
Use only unleaded gasoline. The
use of leaded gasoline will cause
unrepairable damage to the cataly-
tic converter.
Recommended fuel:
REGULAR UNLEADED
GASOLINE ONLY
Fuel tank capacity:
5.5 L (1.45 US gal, 1.21 Imp.gal)
Fuel reserve amount:
1.9 L (0.50 US gal, 0.42 Imp.gal)
INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
Dimensions:Overall length:
1740 mm (68.5 in)
Overall width:
675 mm (26.6 in)
Overall height:
1065 mm (41.9 in)
Seat height:
770 mm (30.3 in)
Wheelbase:
1210 mm (47.6 in)
Ground clearance:
132 mm (5.20 in)
Weight:With oil and fuel:
CS50/CS50M: 81.0 kg (178.6 lb)
CS50Z: 84.0 kg (185.2 lb)
Engine:CS50/CS50M: Air cooled 2-stroke
CS50Z: Liquid cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
49.2 cm
3
Bore x stroke:
40.0 x 39.2 mm (1.57 x 1.54 in)
Compression ratio:
CS50: 11.60:1
CS50M: 10.10 :1
CS50Z: 11.40 :1
Starting system:
Electric starter and kickstarter
Lubrication system:
Separate lubrication (Yamaha autolube)Type:
YAMALUBE 2 or 2-stroke engine oil
Engine oil quantity:Quantity:
1.40 L (1.48 US qt, 1.23 Imp.qt)
Final transmission oil:Type:
SAE10W30 type SE motor oil
Quantity:
0.11 L (0.12 US qt) (0.10 Imp.qt)
Cooling system (CS50Z):Coolant reservoir capacity (up to the maxi-
mumlevel mark):
0.25 L (0.26 US qt) (0.22 Imp.qt)
Radiator capacity (including all routes):
0.91 L (0.96 US qt) (0.80 Imp.qt)
Air filter:Air filter element:
Wet element
Fuel:Recommended fuel:
Regular unleaded gasoline
Fuel tank capacity:
5.5 L (1.45 US gal, 1.21 Imp.gal)
Fuel reserve amount:
1.9 L (0.50 US gal, 0.42 Imp.gal)
Carburetor:Manufacturer:
GURTNER
Type x quantity:
PY12
Spark plug(s):Manufacturer/model:
CS50-CS50Z: NGK/BR8HS
CS50M: NGK/BPR4HS
Spark plug gap:
0.6-0.7 mm (0.024-0.028 in)
Clutch:Clutch type:
Dry, centrifugal automatic
Transmission:Primary reduction system:
Helical gear
Primary reduction ratio:
52/13 (4.000)
Secondary reduction system:
Spur gear
Secondary reduction ratio:
CS50: 42 x 13 (3.230)
CS50M: 45 x 12(3.750)
CS50Z: 43 x 13 (3.308)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic type
Chassis:Frame type:
Steel tube underbone
Caster angle:
25.00 º
Trail:
80.0 mm (3.15 in)
Front tire:Type:
Tubeless
SPECIFICATIONS
8-1
8
Size:
110/70-12 47L
Manufacturer/model:
CHENG SHIN TIRE / C922
Rear tire:
Type:
Tubeless
Size:
120/70-12 51L 130/70-12 56L
Manufacturer/model:
CHENG SHIN TIRE / C922
Loading:Maximum load:
CS50/CS50M: 169 kg (372 lb)
CS50Z: 166 kg (366 lb)
Tire air pressure (measured on cold
tires):
Loading condition:
0–90 kg (0–198 lb)
Front:
175 kPa (1.75 kgf/cm
2, 25 psi,
1.75 bar)
Rear:
200 kPa (2.00 kgf/cm
2, 29 psi,
2.00 bar)
90 kg (198 lb) - maximum load
Front:
175 kPa (1.75 kgf/cm
2, 25 psi,
1.75 bar)
Rear:
225 kPa (2.25 kgf/cm
2, 33 psi,
2.25 bar)
Front wheel:Wheel type:
Cast wheel
Rim size:
MT 2.75X12
Rear wheel:Wheel type:
Cast wheel
Rim size:
MT 3.00X12
Front brake:Type:
Single disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4
Rear brake:Type:
Drum brake
Operation:
Left hand operation
Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
70.0 mm (2.76 in)
Rear suspension:Type:
Unit swingSpring/shock absorber type:
Coil spring/oil damper
Coil spring/gas-oil damper (depens on
models)
Wheel travel:
60.0 mm (2.36 in)
Electrical system:Ignition system:
CDI
Charging system:
Flywheel magneto
Battery:Model:
GT4L-BS
Voltage, capacity:
12 V, 4.0 Ah
Headlight:Bulb type:
Incandescence
Bulb voltage, wattage x quantity:Headlight:
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, 10.0 W x 2
Rear turn signal light:
12 V, 10.0 W x 2
Auxiliary light:
12 V, 5.0 W x 2
Meter lighting:
12 V, 1.2 W x 2
High beam indicator light:
12 V, 1.2 W x 1
SPECIFICATIONS
8-2
8
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 NUM-
BER:
●MODEL LABEL INFORMATION:
EAU26381
Key identification number
1. 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.
TIP
The vehicle identification number is
used to identify your vehicle and may
be used to register it with the licen-
sing authority in your area.
1
1
ZAUM0070
CONSUMER INFORMATION
9-1
9
EAU26490
Model label
1. Model label
The model label is affixed to the bot-
tom of the seat. (See page 3-11).
Record the information on this label in
the space provided. This information
will be needed when ordering spare
parts from a Yamaha dealer.
1
CONSUMER INFORMATION
9-2
9