SAFETY INFORMATION.....................1-1
Further safe-riding points .................1-5
DESCRIPTION.....................................2-1
Left view ...........................................2-1
Right view .........................................2-3
Controls and instruments .................2-5
INSTRUMENT AND CONTROL
FUNCTIONS........................................3-1
Main switch/steering lock .................3-1
Indicator and warning lights .............3-2
Turn signal indicator lights .............3-2
High beam indicator light .................3-2
Oil level warning light .......................3-3
Speedometer ....................................3-3
Multi-function display .......................3-4
Handlebar switches ..........................3-6
Dimmer switch ..................................3-6
Turn signal switch ............................3-6
Horn switch.......................................3-6
Start switch .......................................3-6
Front brake lever...............................3-6
Rear brake lever................................3-7
Fuel and 2-stroke engine oil
tank caps .......................................3-7
Fuel ...................................................3-8
Catalytic converter............................3-9
2-stroke engine oil ..........................3-10
Kickstarter.......................................3-10
Rider seat........................................3-11Storage compartment.....................3-11
Adjusting the shock absorber
assembly .....................................3-12
Luggage hook .................................3-13
FOR YOUR SAFETY–
PRE-OPERATION CHECKS...............4-1
Pre-operation check list....................4-2
OPERATION AND IMPORTANT
RIDING POINTS..................................5-1
Starting a cold engine ......................5-1
Starting off ........................................5-2
Acceleration and deceleration ..........5-2
Braking..............................................5-3
Tips for reducing fuel consumption..5-3
Engine break-in.................................5-4
Parking ..............................................5-4
PERIODIC MAINTENANCE
AND ADJUSTMENT............................6-1
Periodic maintenance and
lubrication chart ............................6-2
Removing and installing the
cowling and panel .........................6-5
Checking the spark plug ..................6-6
Final transmission oil ........................6-7
Coolant .............................................6-8
Air filter element ................................6-9
Adjusting the carburetor .................6-10Adjusting the throttle cable free
play ..............................................6-10
Tires ................................................6-11
Cast wheels ....................................6-12
Checking the front brake lever
free play .......................................6-13
Adjusting the rear brake lever
free play .......................................6-13
Checking the front brake pads
and rear brake shoes ..................6-14
Checking the brake fluid level ........6-15
Changing the brake fluid ................6-16
Checking and lubricating the
throttle grip and cable .................6-16
Lubricating the front and rear
brake levers .................................6-16
Checking and lubricating the
centerstand .................................6-17
Checking the front fork ...................6-18
Checking the steering.....................6-18
Checking the wheel bearings .........6-19
Battery ............................................6-19
Replacing the fuse ..........................6-20
Replacing the headlight bulb
or a front turn signal light bulb ....6-21
Replacing the tail/brake light bulb
or a rear turn signal light bulb .....6-23
Replacing the license plate light
bulb .............................................6-24
Replacing an auxiliary light bulb.....6-24
Troubleshooting ..............................6-25
TABLE OF CONTENTS
●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
1
SAFETY INFORMATION
1-4
modifications not specifically recom-
mended by Yamaha, even if sold and
installed by a Yamaha dealer.
Aftermarket Parts, Accessories,
and Modifications
While you may find aftermarket pro-
ducts similar in design and quality to
genuine Yamaha accessories, recog-
nize that some aftermarket accesso-
ries or modifications are not suitable
because of potential safety hazards to
you or others. Installing aftermarket
products or having other modifica-
tions performed to your vehicle that
change any of the vehicle’s design or
operation characteristics can put you
and others at greater risk of serious
injury or death. You are responsible
for injuries related to changes in the
vehicle.
Keep the following guidelines in mind,
as well as those provided under “Loa-
ding” when mounting accessories.
●Never install accessories or carry
cargo that would impair the per-
formance of your scooter. Care-
fully inspect the accessory befo-
re using it to make sure that it
does not in any way reduceground clearance or cornering
clearance, limit suspension tra-
vel, steering travel or control ope-
ration, or obscure lights or reflec-
tors.
• Accessories fitted to the hand-
lebar or the front fork area can
create instability due to impro-
per weight distribution or
aerodynamic changes. If
accessories are added to the
handlebar or front fork area,
they must be as lightweight as
possible and should be kept to
a minimum.
• Bulky or large accessories may
seriously affect the stability of
the scooter due to aerodyna-
mic effects. Wind may attempt
to lift the scooter, or the scoo-
ter may become unstable in
cross winds. These accesso-
ries may also cause instability
when passing or being passed
by large vehicles.
• Certain accessories can dis-
place the operator from his or
her normal riding position. This
improper position limits the fre-edom of movement of the ope-
rator and may limit control abi-
lity, therefore, such accesso-
ries are not recommended.
●Use caution when adding electri-
cal accessories. If electrical
accessories exceed the capacity
of the scooter’s electrical system,
an electric failure could result,
which could cause a dangerous
loss of lights or engine power.
Aftermarket Tires and Rims
The tires and rims that came with your
scooter were designed to match the
performance capabilities and to pro-
vide the best combination of hand-
ling, braking, and comfort. Other tires,
rims, sizes, and combinations may
not be appropriate. Refer to page
6-11 for tire specifications and more
information on replacing your tires.
DESCRIPTION
2-5
2
1. Rear brake lever (page 3-7)
2. Left handlebar switches (page 3-6)
3. Speedometer (page 3-3)
4. Multi-function display (page 3-4)5. Main switch/steering lock (page 3-1)
6. Right handlebar switch (page 3-6)
7. Throttle grip (page 6-10)
8. Front brake lever (page 3-6)
EAU32240
Controls and instruments
CS50/CS50M/CS50Z
1
234
5
678
INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10460
Main switch/steering lock
The main switch/steering lock con-
trols the ignition and lighting systems,
and is used to lock the steering. The
various positions are described
below.
EAU10640
“” ON
All electrical circuits are supplied with
power, and the engine can be started.
The key cannot be removed.
TIP
The headlight, meter lighting and tai-
llight come on automatically when the
engine is started.
EAU10661
“” OFF
All electrical systems are off. The key
can be removed.
EWA10061
sWARNING
Never turn the key to “ ” or “ ”
while the vehicle is moving. Other-
wise the electrical systems will be
switched off, which may result in
loss of control or an accident.
EAU10670
The 2-stroke engine oil level warning
light should come on. (See page 3-2).
EAU10681
“ ” LOCK
The steering is locked, and all electri-
cal systems are off. The key can be
removed.T
o lock the steering
1. Push.
2. Turn.
1. Turn the handlebars all the way to
the left.
2. Push the key in from the “ ”
position, and then turn it to “ ”
while still pushing it.
3. Remove the key.
To unlock the steering
1. Push.
2. Turn.
1. Push the key in, and then turn it
to “ ” while still pushing it.
EAU11003
Indicator and warning lights
1. Left turn signal indicator light “ ”
2. Oil level warning light “ ”
3. High beam indicator light “ ”
4. Right turn signal indicator light “ ”1. Left turn signal indicator light “ ”
2. Coolant temperature warning light “ ”
3. Oil level warning light “ ”
4. High beam indicator light “ ”
5. Right turn signal indicator light “ ”
EAU11030
Turn signal indicator lights “ ”
and “ ”
The corresponding indicator light flas-
hes when the turn signal switch is
pushed to the left or right.
EAU11080
High beam indicator light “ ”
This indicator light comes on when
the high beam of the headlight is swit-
ched on.
km/h
01020304050607080
14
3 25
CS50Z
km/h
01020304050607080
143 2
CS50/CS50M1
2
INSTRUMENT AND CONTROL FUNCTIONS
3-2
3
PERIODIC MAINTENANCE AND ADJUSTMENT
6-3
6
ODOMETER READING
CHECK OR ANNUAL
NO. ITEM MAINTENANCE JOB
1000 km 6000 km 12000 km 18000 km 24000 kmCHECK
(600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi)
7*Wheels• Check runout and for damage.√√√ √
• Check tread depth and for damage.
8*Tires• Replace if necessary.
√√√ √√
• Check air pressure.
• Correct if necessary.
9*Wheel bearings• Check bearing for looseness
or damage.√√√ √
• Check bearing play and steering
10 *Steering bearingsfor roughness.√√ √√ √
• Lubricate with lithium-soap-
based grease.Every 24000 km (14000 mi)
11 *Chassis fasteners• Make sure that all nuts, bolts and
screws are properly tightened.√√√ √√
12Front brake lever
pivot shaft• Lubricate with silicone grease.√√√ √√
13Rear brake lever • Lubricate with lithium-soap-
pivot shaftbased grease.√√√ √√
14Centerstand• Check operation.
• Lubricate.√√√ √√
15 *Front fork• Check operation and for oil
leakage.√√√ √
16 *Shock absorber • Check operation and shock
assemblyabsorber for oil leakage.√√√ √
17 *Carburetor• Adjust engine idling speed.√√ √√ √ √
18 *Autolube pump• Check operation.
• Bleed if necessary.√√ √√
EAU23272
Checking the front fork
The condition and operation of the
front fork must be checked as follows
at the intervals specified in the perio-
dic maintenance and lubrication
chart.
To check the condition
1. Check the inner tubes for scrat-
ches, damage and excessive oil
leakage.
To check the operation
1. Place the vehicle on a level surfa-
ce and hold it in an upright posi-
tion. WARNING! To avoid injury,
securely support the vehicle so
there is no danger of it falling
over.
[EWA10751]
2. While applying the front brake,
push down hard on the handle-
bars several times to check if the
front fork compresses and
rebounds smoothly.
ECA10590
NOTICE
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or
repair it.
EAU45511
Checking the steering
Worn or loose steering bearings may
cause danger. Therefore, the opera-
tion of the steering must be checked
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart.
1. Place the vehicle on the centers-
tand. WARNING! To avoid
injury, securely support the
vehicle so there is no danger of
it falling over.
[EWA10751]
2. Hold the lower ends of the front
fork legs and try to move them
forward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the stee-
ring.
PERIODIC MAINTENANCE AND ADJUSTMENT
6-18
6