Page 1
Do not remove this Owner’s Manual from the vehicle. Read this manual carefully
before operating the vehicle as it contains important safety information.
Page 2
Read this manual carefull y.
WARNING
CAUTION
WARNING
This Owner’s Manual contains important information on safety, operation and maintenance of your KYMCO Sento scooter.
Any one who operates your scooter should carefully read and understand the contents of this manual before riding the scooter.
For your safety, understand and follow all of the warnings contained in this Owner’s Manual and the labels applied to your scooter .
This Owner’s Manual should be considered a permanent part of the vehicle, keep it with your scooter at all times.
ON-ROAD USE ONLY This scooter has been designed to be used on the road.
Particularly important information is called out in this manual by the following icons and notations:
The SAFETY ALERT symbol with the exclamation point in the triangle means ATTENTION!
BE ALERT! YOUR SAFETY CAN BE AFFECTED.
Failure to follow instructions associated with a WARNING symbol could result in severe injury or
death to the rider, a passenger, a bystander, or a person inspecting or repairing the scooter.
A CAUTION symbol indicates that special precautions must be taken to avoid damaging
the scooter.
NO NO
NO
NO NO
TETE
TE
TETE
The NOTE symbol indicates key information about a procedure or to clarify an operation.
California Proposition 65
This product contains or emits chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm.
Page 3
TABLE OF CONTENTS
Manual Icon Legend .................................................... (inside of front-cover)
CA Prop 65 Warning .................................................... (inside of front-cover)
Table of Contents .......................................................................................... 1
SECTION 1 - SAFETY.................................................................2 - 6
Forward ......................................................................................................... 2
Scooter Safety ......................................................................................... 3 - 4
Load Limits & Guidelines ............................................................................. 5
Accessories & Modifications ........................................................................ 6
SECTION 2 - CONTROLS & FEATURES ............................... 7 - 15
Locations of Parts & Controls ...................................................................... 7
Keys ............................................................................................................... 8
Ignition Switch ............................................................................................... 9
Right-hand Handlebar Switch ...................................................................... 9
Engine-stop Switch ....................................................................................... 9
Electric Start Button .................................................................................... 10
Left-hand Handlebar Switch ....................................................................... 10
Headlight Dimmer Switch ........................................................................... 10
Turn Signal Switch ...................................................................................... 10
Turn Signals ................................................................................................ 11
Under-seat Storage Compartment ............................................................ 11
Helmet Posts ............................................................................................... 12
Main Stand .................................................................................................. 12
Instruments ................................................................................................. 13
Service Indicator Light ................................................................................ 13
Security Combination Lock ........................................................................ 14
Passenger Pegs ......................................................................................... 14
SECTION 3 - OPERATION ..................................................... 16 - 32
Break-in Recommendations ....................................................................... 16
Tire Break-in ................................................................................................ 17
Pre-ride Inspection ............................................................................... 18 -25
Engine Oil Inspection ................................................................................. 19
Brake Inspection ..................................................................................19 - 20
Tire Inspe ction ............................................................................................ 21
Fuel Level / Filler Cap ................................................................................ 22
Steering & Handlebar Inspection ............................................................... 23
Instrument Inspection ................................................................................. 23
Horn & Lights Inspection ............................................................................ 24
Chassis Inspection ..................................................................................... 25
Starting the Engine (electric start) ...................................................... 26 - 27
Starting the Engine (kick start) ................................................................... 27
Riding Your Scooter .............................................................................28 - 31
Parking Your Scooter .................................................................................. 32
SECTION 4 - MAINTENANCE............................................... 33 - 48
Importance of Maintenance ....................................................................... 33
Maintenance Schedule ........................................................................34 - 35
Tires ............................................................................................................. 36
Tire Pressure ............................................................................................... 36
Air Filter Maintenance ................................................................................ 37
Fuel Hoses .................................................................................................. 38
Battery .................................................................................................. 38 - 39
Fuses ........................................................................................................... 39
Engine Oil .................................................................................................... 40
Engine Oil Level Inspection & Change ............................................... 40 - 41
Transmission Fluid Inspection & Change .................................................. 42
Spark Plug ................................................................................................... 43
Brake Fluid Level Inspection ...................................................................... 43
Cleaning Your Scooter ......................................................................... 44 - 45
Storage .................................................................................................46 - 47
Maintenance Record .................................................................................. 48
Specifications .............................................................................................. 49
Emission Information & EP A Warranty ...................................................... 50
KYMCO Limited Scooter W arranty ............................................................ 51
Index ............................................................................................................ 52
Identification Numbers Record .................................. (inside of back-cover)
1
Page 4
SECTION 1 FORWARD & SAFETY INTRODUCTION
Thank you for purchasing this KYMCO Sento scooter , and welcome to the KYMCO riding family .
Please read this owner's manual carefully before riding so that you will be thoroughly familiar with the
proper operation of your scooter ’s controls, its features, its capabilities, and its limitations.
To ensure a long, trouble-free life for your scooter , provide it with the proper care and maintenance as
described in this manual.
For replacement parts and accessories, you should always use genuine KYMCO products, as they have
been specially designed for your vehicle and manufactured to meet KYMCO's demanding standards.
Keep this owner's manual aboard your scooter at all times, so that you can refer to it whenever you need
information. This manual should be considered a permanent part of the scooter and should remain with the
scooter when it is sold.
All information, illustrations, photographs and specifications contained in this manual are based on the
latest product information available at the time of publication. Due to improvements or other changes, there
may be information in this manual that differs slightly from your vehicle. KYMCO reserves the right to make
product and publication changes at any time, without notice, and without incurring any obligation.
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Page 5
SCOOTER SAFETY
IMPORTANT SAFETY INFORMATION
Your scooter can provide you many years of service and pleasure if you take responsibility for your own safety and understand the challenges that you can meet on the road. There is
much that you can do to protect yourself when you ride. Y ou
will find many helpful recommendations throughout this
manual. Here are some very important safety tips:
Wear a helmet
Scooter safety equipment starts with a quality helmet. One of
the most serious injuries you can suffer in a crash is a head
injury. Always wear a properly approved helmet. Y ou should
also wear suitable eye protection.
Make yourself easy to see
To make yourself more visible, wear bright reflective clothing,
position yourself so other drivers can see you, signal before
turning or changing lanes, and use your horn when it will help
others notice you.
Know your limits
Ride within the boundaries of your own skill at all times. Knowing these limits and staying within them will help you to avoid
accidents.
Keep your scooter in safe condition
For safe riding, it's important to inspect your scooter before
every ride and perform all recommended maintenance. Never
exceed load limits, and only use accessories that have been
approved by KYMCO for this scooter .
Inspect your scooter before riding
Do not forget to perform an entire safety inspection to ensure
you, and your passenger's safety , before each ride.
Be extra safety conscious on bad weather days
Riding on bad weather days, especially wet ones, requires extra caution. Braking distance can double on a rainy day . Stay
off of the painted surfaces, manhole covers and greasy appearing areas on the pavement, as they can be especially slippery. Use extreme caution at railway crossings and on metal
gratings and bridges. Whenever your are in doubt about the
road conditions, slow down.
Modification
Modification of your scooter , or removal of original equipment
may render the vehicle unsafe or illegal. Obey all applicable
equipment regulations in your area.
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SCOOTER SAFETY
PROTECTIVE APPAREL
For your safety, always wear an approved motorcycle or scooter
helmet, eye protection, boots, gloves, long pants, and a longsleeved shirt or jacket whenever you ride your scooter .
Helmets and protection
Your helmet is your most important piece of riding gear because it offers the best protection against head injuries. Y our
helmet should fit your head comfortably and securely . Always
wear a face shield or goggles to protect your eyes and to aid
your vision.
Additional riding gear
In addition to a helmet and eye protection, you should also use:
• Sturdy boots with nonslip soles to help protect your
feet and ankles
• Leather gloves to keep your hands warm and help pre-
vent blisters, cuts, burns and bruises
• A motorcycle or scooter riding suit or jacket that has
been designed for comfort as well as protection. Bright
colored and reflective clothing can help make you more
noticeable in traffic. Be sure to avoid loose clothes that
could get caught on any part of your scooter .
33
3
33
22
2
22
11
1
11
55
5
55
1 Wear gloves
2 Clothes should be fit properly (not too tight or loose)
3 Always wear a helmet. Y ou should also wear eye protection
4 Wear bright or reflective clothing
5 Footwear should be the proper size, have low heels,
and offer ankle protection
44
4
44
Not wearing a helmet increases your chance of serious
injury or death in a crash.
4
Be sure you and your passenger always wear an approved
motorcycle helmet that fits properly. You should also wear
eye protection and other protective apparel when you ride.
Page 7
LOAD LIMITS & LOADING GUIDELINES
These general guidelines may help you decide how to add
accessories to your scooter and how to load it properly .
Load limits
These specifications are the load limits for your Sento scooter.
Overloading the scooter will affect its stability and handling, be
sure to stay within the limits given below:
Maximum weight capacity (Includes the weight of the rider,
passenger, cargo and accessories): ...... 430 lbs (195 kg)
Maximum cargo weight:................................. 55 lb (25 kg)
Front glove box weight limit:..........................11 lbs (5 kg)
Under-seat compartment weight Iimit:.......... 22 lbs (10 kg)
Rear carrier (rack) weight Iimit: ..................... 22 lbs (10 kg)
Overloading or improper loading will affect vehicle handling, stability and braking, and can lead to an accident.
Never exceed the stated load capacity of your scooter.
Cargo should be properly distributed and securely at-
tached. Reduce speed when carrying cargo. Allow greater
distance for braking.
Loading guidelines
Improperly loading your scooter will affect its stability and handling. You should ride at reduced speeds when you are carrying a
passenger or cargo. Follow these guidelines whenever you carry
a passenger or cargo:
• Check that both tires are properly inflated
• To prevent loose items from creating a hazard, make
sure all cargo is securely tied down before you ride
• Place cargo weight as close to the center of the scooter
as possible
• Balance cargo weight evenly on both sides of the scooter
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ACCESSORIES & MODIFICATION
There is a large variety of accessories available to KYMCO
scooter owners. KYMCO cannot have direct control over the
quality or suitability of accessories you may wish to purchase.
The addition of unsuitable accessories to your scooter can
lead to unsafe operating conditions. It is not possible for
KYMCO to test each accessory on the market or combinations of all the available accessories; however , your KYMCO
dealer can assist you in selecting quality accessories and then
install them correctly .
Use extreme caution when selecting and installing the accessories for your scooter.
No modifications
KYMCO strongly advises you against removing any original
equipment or modifying your scooter in any way that would
change its design or operation.
Improper accessories or modifications can make your
scooter unsafe and can lead to an accident.
Never modify your scooter through the improper installation or use of accessories. All parts and accessories added
to this vehicle should be genuine KYMCO or equivalent
components designed for use on this scooter and should
be installed and used according to instruction. If you have
any questions, consult an authorized KYMCO dealer.
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SECTION 2 CONTROLS & FEATURES
Location of par ts & contr ols
33
3
33
22
2
22
11
1
11
ARAR
AR
ARAR
AQAQ
AQ
AQAQ
APAP
AP
APAP
44
4
44
55
5
55
66
6
66
88
8
88
77
7
77
AOAO
AO
AOAO
ANAN
AN
ANAN
99
9
99
AMAM
AM
AMAM
ATAT
AT
ATAT
ALAL
AL
ALAL
AKAK
AK
AKAK
1 Exhaust Muffler
2 Fuel Tank
3 Rear Rack
4 Mirrors
5 Ignition Switch
6 Right Front T urnsignal
NOTE: Write your scooter’s VIN and ESN in the boxes provided in the inside, rear cover of this Owner's Manual.
NOTE: Your scooter may differ slightly in appearance from the images in this manual.
7 left Front Turnsignal
8 Headlight
9 VIN (Frame Number)
AT Left Rear T urnsignal
AK Tail/Brake Light
AL Kick-start Lever
AM ESN (Engine Serial Number)
AN Main Stand (Center Stand)
AO Left Passenger Peg
AP Battery
AQ Right Passenger Peg
AR Oil Disptick
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CONTROLS & FEATURES
Keys
Y our Sento scooter is supplied with two identical ignition switch
keys 1. The ignition key operates the ignition switch, the steer-
ing lock, and the fuel filler cap, and is used to open the seat to
gain access to the center compartment.
11
1
11
The keys have a unique code that is stamped on the tab supplied with the keys. This code is not stamped on the scooter
and is not recorded in the vehicle's basic documentation for
security reasons. Since this code is required if you need replacement keys, record this important code in the box provided
on the inside, rear cover of this Owner's Manual.
Ignition switch
To operate the ignition switch and it’s functions:
"Position:
"
All electrical circuits are off. The engine will not start or run.
The key can be removed from the ignition switch.
" Position:
"
The ignition circuit is "ON" and engine can now be started. The
key cannot be removed from the ignition switch in this position.
" Position:
"
To open the seat, turn the key to the " " position.
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CONTROLS & FEATURES
" "Position:
Right handlebar switch
To lock the steering, turn the handlebar all the way to the left, push
down and turn the key to the " " position and remove the key. All
electrical circuits are off and the key can be removed.
" " Position:
To open the fuel filler cap, turn the key to the " " position.
Make sure that the key is at the " " position when starting
the engine.
After locking the ignition switch, turn the handlebar gently to confirm that the steering is locked. Do not park
your scooter in a position that will interfere with vehicle
or pedestrian traffic.
Do not turn the ignition switch to the lock position when
riding, as this could cause the steering to lock and you
could lose control of your scooter.
11
1
11
22
2
22
Engine stop switch
The engine stop switch turns off the ignition, stopping the engine while the scooter’s lights and horn still function.
Electric starter button
Press the electric starter button to activate the starter motor.
NOTE: The starter motor will not engage unless a brake lever is squeezed at the same time the starter button is pressed.
To prevent damage to the starter motor, do not operate
the starter motor for more than five seconds at a time. If
the scooter fails to start immediately, check the fuel level
and the battery condition, and allow the starter motor to
cool before attempting to start the engine again.
1 1
1 " & ":
1 1
2 2
2 "
2 2
":
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CONTROLS & FEATURES
Left handlebar switch
33
3
33
55
5
55
44
4
44
88
8
88
66
6
66
99
9
99
77
7
77
Dimmer switch -UP
" "switch position turns the headlight high beam on and the
high beam indicator light on the dash is activated as well.
Dimmer switch -DOWN
"
" switch position turns the headlight low beam on.
Passing light button - PRESS DOWN
Press down on the rocker switch to rapidly flick the headlight high
beam on and off to signal other vehicles that you wish to pass.
10
33
3:
33
44
4:
44
55
5:
55
Turn signal switch:
Use the turn signal indicator to signal to other traffic your intention to turn or change lanes. The turn signal light on the
dash will flash to alert the rider that the switch is engaged.
66
6 " " for turning to the "left".
66
77
7 " " for turning to the "right".
77
To cancel the turn signal, press in on the signal switch 8.
Horn button
Press the horn button to sound the horn.
NOTE: The horn will only sound when the ignition is “ON”.
99
9 "
99
":
Page 13
CONTROLS & FEATURES
Turn signals (
In most markets the Sento 50’s turn signals are mounted directly to the scooter’s body panels. However, the turn signals
on certain North American editions of the Sento 50 are mounted
externally.
ATAT
AT Front turn signal
ATAT
North American market models):
ATAT
AT
ATAT
Under-seat storage compartment
Your Sento scooter is equipped with an under-seat storage compartment that permits you to secure your helmet or other items.
To open the seat, insert the ignition switch key into the seat lock
and turn it clockwise. When the latch releases, lift up the seat.
Under-seat compartment weight Iimit: ...... 22 lbs (10 kg)
To close the seat, lower the seat and press down until it is
secured by the latch. Gently lift up on the seat to make sure it
is locked before riding.
AKAK
AK
AKAK
AKAK
AK Rear turn signals
AKAK
Never exceed the maximum weight limit of the storage
compartment, as vehicle handling and stability may be
severely affected. Do not leave the ignition switch key
under the seat.
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CONTROLS & FEATURES
Helmet posts
Your Sento scooter has two helmet posts AT so you can secure
your helmet(s) outside of the under-seat storage compartment.
ATAT
AT
ATAT
With the seat up, put the helmet’s retaining ring onto the helmet
post. Lower and press down on the seat to lock it and secure the
helmet in place. To remove the helmet, open the seat.
Do not ride your scooter with a helmet hanging from a
helmet post. The helmet can interfere with your ability to
control your scooter, causing an accident.
The under-seat storage compartment may become warm
from engine heat. Do not store food, or flammable materials, which are susceptible to heat damage in this
compartment.
12
Main stand
Your Sento scooter is equipped with a main (center) stand.
To park your scooter on the main stand, stand on the left side
of the scooter and grasp the handlebar with your left hand
while grasping the side of the rear rack with your right hand.
Step down on the foot pad of the main stand with your foot
while pulling up and back on the rear rack. This lifting motion
will allow the scooter to rock backwards and up onto the main
stand.
Always park your the scooter on firm, level ground to
help prevent it from falling over. If you must park on an
incline, aim the front of your scooter uphill.
(center stand)
Page 15
CONTROLS & FEATURES
Instruments
(U.S. market)
33
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33
22
2
22
44
4
44
55
5
55
66
6
66
11
1
11
1 1
1 Fuel Gauge: This gauge indicates the amount of gasoline
1 1
in the fuel tank. As the needle approaches “E” that indicates the tank is near empty and should be refilled with
unleaded gasoline.
22
2 Speedometer: Indicates the road speed in MPH (miles
22
per our) and K/PH (kilometers per hour).
33
3 Odometer: Indicates the total riding mileage of the scooter.
33
4 4
4 High Beam Indicator Light: This light is illuminated when
4 4
the headlight high beam is on.
55
5 Turn Signal Indicator Light: Flashes when either turn
55
signal is being used.
66
6 Oil Service Indicator Light: This light will come on when
66
the mileage has been reached for the next engine oil service.
NOTE: After changing the engine oil, the oil service indicator light should be reset. Press the ignition key into the
slot on the bottom edge of the instruments.
Do not reset the oil service indicator light unless the
engine oil has been changed.
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CONTROLS & FEATURES
Security combination lock
Your Sento scooter is equipped with a security feature that can be
used to “lockout” the ignition to reduce the risk of theft.
22
2
11
1
11
A three digit combination code is supplied with the scooter stamped
into an aluminum fob 1.
NOTE: This unique combination code is not stamped on the
scooter and is not recorded in the vehicle's basic documentation for security reasons. Record this important code in the
boxes provided on the inside, rear cover of this Owner's
Manual.
22
22
2
22
22
2
22
33
3
33
NOTE: When the seat is opened, the security combination
lock dials
Input the code (using the procedure listed below) within that
time to “unlock” the ignition. If the lock lamps go out before
you rotate the dials to the security code, press the access
button
To “unlock” the security feature:
1. Rotate each dial 2to the security combination code.
2. If the combination code is correct, the engine will start.
3. If the combination code is incorrect, the engine will not start.
NOTE: Leaving the security combination lock dials
combination code position will keep the system “unlocked”.
Record the security combination code in this manual. If
you fail to document the code, only your KYMCO authorized dealer will be able to replace the security device (it cannot be reprogrammed).
Replacement of the security combination lock because
of a lost code is not a warranty defect and will be performed at the expense of the scooter’s owner.
2 2
2 will illuminate for approximately thirty seconds.
2 2
3 3
3 to reset the code entry system
3 3
2 2
2 at the
2 2
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CONTROLS & FEATURES
Passenger foot pegs
Your Sento scooter is equipped with additional pegs for use when
you are carrying a passenger.
44
4
44
1. To move the passenger pegs 4out from the scooter’s body,
press the release button 5.
2. When you are not carrying a passenger, press the pegs
back into place.
55
5
55
Riding with a passenger will change the handling characteristics of your scooter. Allow for extra braking distance and use extra care when riding in traffic.
Be sure you and your passenger always wear an approved motorcycle helmet that fits properly. You should
also wear eye protection and other protective apparel
when you ride.
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SECTION 3 OPERATION
Break-in recommendations
The first 600 miles (1,000 km) of riding are the most important
in the life of your scooter. Proper break-in operation during
this time will help ensure maximum life and performance from
your new scooter. Proper break-in operation allows the machined surfaces to polish each other and mate smoothly.
Your scooter’s reliability and performance depend on special
care and restraint exercised during the break-in period. It is
especially important that you avoid operating the engine in a
manner which could expose the engine parts to excessive heat.
The following guidelines should be followed during the breakin period:
Maximum throttle operation:
Initial 300 miles (600 km): ........ Less than 1/2 throttle
Up to 600 miles (1,000 km): ..... Less than 3/4 throttle
Vary the engine speed:
The engine speed should be varied and not held at a constant
rate for long periods of time. This allows the parts to be "loaded"
with pressure, and then unloaded, allowing the parts to cool.
This aids in the mating process of the engine and transmission components. It is essential that some stress be placed
on these components during break-in to ensure this mating
process. Do not, however, apply excessive load on the scooter's
drive line.
Avoid constant low speed:
Operating the engine at constant low speed (light load) can
cause parts to glaze and not seat in properly. Allow the engine
to accelerate freely through the gears, without exceeding the
recommended throttle openings.
Avoid using full throttle for the first 300 miles (500 km).
The initial service:
Observe your first and most critical service. The 200 mile (300
km) initial service is the most important service your scooter
will receive. During the break-in period all of the engine components will have worn in, and all of the other parts will have
seated in, so adjustments will be required. All fasteners will be
tightened, and the contaminated engine oil will be replaced.
NOTE: Completion of the 200 mile (300 km) initial service
will ensure optimum service life and performance from
your scooter. Do not delay in having this service performed
once your scooter reaches this mileage.
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OPERATION
The 200 mile (300 km) service should be performed as
outlined in the maintenance schedule section of this
owner's manual. Pay particular attention to the cautions
and warnings in maintenance schedule section.
Unless you have formal training as a service technician and have access to KYMCO technical reference
materials, it is strongly suggested that you have the
initial service performed by a KYMCO dealer.
Breaking in the new tires
New tires need proper break-in to assure maximum performance, just as your scooter's engine does. Wear in the tread
surface by gradually increasing your cornering lean angles
over the first 100 miles (160 km) before attempting maximum
lean angles. Avoid hard acceleration, hard cornering, and hard
braking for the first 100 miles (160 km).
Failure to break in your tires could cause the tires to
slip and could result in you losing control of the scooter.
Troubleshooting
It can be fustrating if your scooter fails to start or stops running
while your are riding. In the rare instance this happens, take a
few moments to checks some items and you may be back to
riding your scooter soon.
√√
√ Do you have enough gasoline in the fuel tank?
√√
√√
√ Did you follow the correct procedure for starting the
√√
engine?
√√
√ Is the battery voltage low (you may need to kick start
√√
your scooter)?
√√
√ Is the main fuse in good condition?
√√
Use extra care when riding on new tires. Perform proper
break-in of the tires as described in this Owner’s Manual
and avoid hard acceleration, hard cornering, and hard
braking for the first 100 miles (160 km).
NOTE: Use this Owner’s Manual to check components and
adjustments that are within your technical ability. If you
cannot resolve the problem, do not hesitate to contact your
KYMCO dealer for assistance.
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Page 20
OPERATION
Pre-ride inspection (PRI)
For your safety, it is very important to take a few moments
before each ride to walk around your scooter and check its
condition. If you detect any problem, be sure to address it immediately, or have it corrected by your KYMCO dealer.
Improperly maintaining your scooter or failing to correct a problem before riding can cause a crash in which
you can be seriously hurt or killed.
Always perform a pre-ride inspection before every ride
and correct any problems.
1. Engine oil level: Add engine oil if required (page 19). Check
for leaks.
2. Front and rear brakes: Check operation, make sure there
is proper free-play at the levers (page 19 & 20). Inspect the
brake pads and shoes for wear (page 20)
3. Tires: Check condition and inflation pressure (page 21 & 22).
4. Fuel level: Fill fuel tank when necessary (page 22). Check
for leaks.
7. Lights and horn: Check that headlight, tail/brake light, turn
signals, indicators and horn function properly (page 24).
8. Chassis: Check for overall proper function (page25).
Performing pre-ride inspections does not take the place
of regular maintenance. Follow the maintenance schedule recommendations on pages 33 - 48 of this manual.
After one month of use or 300 miles (500 km) of riding,
which ever occurs first, contact your KYMCO dealer to
have an initial service of your scooter performed.
This initial service is most important service in the life
of your scooter and includes checks and adjustments
that will help ensure that your scooter operates efficiently and safely.
6. Steering: Check for smooth operation in all steering positions (page 23).
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OPERATION
PRI - Engine oil level inspection
NOTE: Park your scooter on the main stand, on level ground.
11
1
11
F
L
1. Unscrew the dip stick 1, remove it and wipe it with a clean
cloth
2. Reinstall the dip stick, but
case. Touch the threaded part of the dip stick to the engine
case.
3. Remove the dip stick and visually note the oil level on the
stick. The engine oil level should be above the "L" mark but
not higher than the "F" mark. Add or remove oil as required.
Do not overfill the engine with oil. Overfilling the engine can cause oil leaks and/or oil contamination of
the air filter element. Always make sure the oil level is
above the "L" mark but not higher than the "F" mark.
do not thread it into the engine
Use extreme caution when performing the oil level inspection or any other checks if the scooter’s engine
has been recently run. The engine oil, engine case and
muffler can become very hot creating a burn hazard.
PRI - Brake inspection
Your scooter requires the proper brake lever free-play so the
brakes will be responsive and will not drag, causing premature wear to the brake pads.
The free-play is the measured distance between the brake
lever at rest and a fully applied brake.
0.4 - 0.6 in (10 - 20 mm)
1. Measure the free-play and the brake lever end (0.4 - 0.6 in
(10 - 20 mm).
2. Use the cable adjuster on each brake lever perch for minor
free play adjustment.
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OPERATION
3. To perform free play adjustment outside of the range of the
cable adjusters on the brake lever perches, use the adjuster
nut at the end of the brake cable where it connects to the
brake arm.
NOTE: Before adjusting the free play with the brake arm
adjuster nut, turn the adjusters on the brake lever perches
as far as they will turn in a clockwise direction.
22
2
11
1
11
4. Rotating the adjuster nut clockwise 1 reduces the clutch
lever free play. Rotating the adjuster nut counterclockwise
2 increases the clutch lever play.
22
Inspect the brake pad and shoe thickness to verify there is
enough material for the brakes to function properly.
44
4
44
33
3
33
1. If the wear indicator grooves in the front brake pads are no
longer visible 3, it is an indication that the brake pads are
worn and require replacement.
2. If the “ “ mark on the rear brake indicator 4 aligns with
the “ “ mark on the brake hub it is an indication that the
brake shoes are worn and require replacement.
For appropriate brake action, make sure the groove of the
adjusting nut is aligned with the pin in the brake arm.
20
The brakes will wear quickly if the lever is continually applied during riding (dragging the brake).
Consult your KYMCO dealer for braking system service.
Page 23
OPERATION
PRI - Tire inspection
The condition of your scooter’s tires is vital for operational efficiency and your safety. Check the tires’ inflation pressure,
the tread depth, and for damage before each ride.
Front tire (rider only): 17.5 PSI (1.25 kg/cm
Rear tire (rider only): 29.0 PSI (2.0 kg/cm2)
Front tire (rider & passenger): 25.0 PSI (1.75 kg/cm
Rear tire (rider & passenger): 32.0 PSI ( 2.25 kg/cm
2
)
2
)
2
)
11
1
11
2. Inspect the tires for nails, screws and other objects 1 that
may be imbedded into the rubber.
33
3
33
22
2
22
33
3
33
3. Check the tread depth 2 at the wear indicator points 3. If
the tread is worn smooth at these points, the tire must
be replaced.
44
4
44
1. Measure and adjust the tire pressure when the tires are
touching the ground (with no person on the scooter).
NOTE: Measure the pressure before riding as the heat generated during operation may cause improper readings.
55
5
55
44
4
44
4. Check for damage 4 (blisters or cuts) in the side wall, or
for significant flat spots 5 on the tires tread. Replace the
tire immediately if any damage of this type is present.
21
Page 24
OPERATION
The tires on your scooter must be replaced if they:
Leak air (even at a slow rate)
Have any damage on the tread or side wall areas
Have been damaged by intrusion of objects, such as a nail
Are worn as evidenced by the wear indicators
Failure to replace a tire in poor condition will cause an
unsafe riding condition on your scooter. Replace worn or
damaged tires immediately for your, and your passenger’s,
safety.
Consult your KYMCO dealer for replacement tire service.
33
3
22
2
22
33
11
1
11
Fuel recommendation
Use unleaded gasoline with a research octane number of 91
or higher. Unleaded gasoline will extend spark plug life.
PRI - Fuel level inspection / Refilling
When the fuel level gauge needle approaches “E” (indicating
the tank is nearly empty) refill the tank with unleaded gasoline.
To open the fuel filler cap:
Turn the ignition switch key from the " "position to the " "
position, and the fuel filler cap 1 will open 2.
22
Do not overfill the tank. There should be no fuel in the
filler neck
rative emission canister, resulting in poor drivability.
2. After refueling, be sure to close the filler cap securely.
Gasoline is highly flammable and explosive. You can be
burned or seriously injured while handling fuel.
* Stop the engine and keep heat, sparks, and flame away.
* Refuel only out doors.
* Clean up fuel spills immediately.
33
3. Excess fuel can contaminate the evapo-
33
Page 25
OPERATION
PRI - Steering & handlebar inspection
Before riding, inspect your scooter’s handlebars for damage
and to make sure the steering’s side-to-side and up-and-down
movement is smooth.
11
1
11
2. Apply the front brake (right lever) and press down and release pressure on the handlebar and listen for any abnormal noise.
3. As you press down and release, feel for any looseness from
the chassis transmitted to the handlebar.
4. Turn the handlebar from the center fully to the left and then
fully to the right, feeling for any loose components and listen
for any abnormal sounds.
If you detect any looseness or abnormal sounds during your steering inspection, do not ride your scooter.
Consult your KYMCO dealer for chassis service.
PRI - Instrument inspection
Before your ride, and as you begin your ride, make sure the
instruments are functioning.
1. Is the fuel level gauge needle indicating the fuel level?
2. Do the indicator lights (turn signal, for example) function?
3. Does the speedometer needle move as the scooter moves?
1. Visually inspect the handlebars 1 for any damage.
NOTE: Contact your KYMCO dealer for repair of your
scooter’s instruments if they are not functioning properly.
23
Page 26
OPERATION
PRI - Hor n & lights inspection
11
1
11
1. Turn the igntion switch to “ “ and press the horn button 1
to check if it sounds.
33
3
22
2
22
33
44
4
44
2. Turn on the headlight switch to see if the headlight 2 and
the tail light 4 are illuminated. Check the lenses for dirt or
damage.
3. Squeeze each brake lever to make sure the brake lamp in
the tail light 4 illuminates.
4. Operate the turn signal switch to make sure the turn signals
3 flash. Make sure each of the four signals flash and the
lenses are free of dirt and are not broken.
The horn is an essential safety item as it will alert other
traffic to your presence.
The headlight must be in good working order to illuminate your riding path at night.
The tail/brake light is required so others in traffic can
see your scooter and be alerted to your intention to stop
or slow down.
The turn signals indicate your turning intentions.
Because all of these systems are vital safety items, con-
tact your KYMCO dealer for replacement bulbs or electrical system service or repair should there be any malfunctions.
24
Page 27
OPERATION
PRI - Chassis inspection
Complete the pre-ride inspection of your scooter by checking
items on its chassis.
Front suspension & rear shock absorber: Check the operation of the suspension by pressing down on the handlebars
and seat. Make sure the suspension returns in a smooth fashion.
Brake lever operation: Check that the rear brake (left lever)
and the front brake (right lever) have pressure and lock the
wheels when you squeeze the levers.
Mirrors: Adjust the mirrors’ aim while seated on the scooter
BEFORE you begin riding.
License plate: Make sure your license plate is securely
mounted and your registration is up-to-date.
Reflectors: Look to make sure all of the safety reflectors are
still mounted to your scooter. Replace any missing or damaged reflectors.
Lubrication points: Occasionally check and lubricate certain
controls and points on the scooter as called out in the periodic
maintenance schedule (see page xx).
25
Page 28
OPERATION
Star ting the engine (electric start)
To start your scooter using the electric starting motor, follow
this procedure:
NOTE: Before starting, check
the engine oil and fuel levels.
Take the scooter off of the
main stand.
1. Unlock the steering with the
igntion switch key
2. Turn the igntion switch to “ “.
The brake must be adjusted and functioning properly
to lock the rear wheel during starting or the scooter
could accelerate away when the engine starts.
4. Press the starter button without rotating the throttle grip.
NOTE: If the scooter’s engine is warm and does not start
immediately, rotate the throttle grip to 1/8 to 1/4 open to
help the engine start.
3. Apply the rear brake (left lever) .
26
To prevent damage to the starter motor, do not operate
the starter motor for more than five seconds at a time. If
the scooter fails to start immediately, check the fuel level
and the battery condition, and allow the starter motor to
cool before attempting to start the engine again.
Page 29
OPERATION
NOTE: If the scooter has not been riden for a long period
of time it may be hard to start. Add fresh fuel and press
the starter button several times in succession to try to
start the engine. If the scooter does not start, contact your
KYMCO dealer as your scoooter may need to have its fuel
system cleaned and adjusted.
NOTE: The rear brake must be held for the startr motor to
engage the engine. It is normal for the stop light to be
illuminated during starting.
Once the scooter starts the rear wheel may spin. To
avoid injury, keep your body and clothing away from
the rear wheel.
5. Allow a cold engine to warm 2 - 3 minutes before riding.
Do not press the starter button once the engine is running or the starter motor and engine can be damaged.
Your scooter's exhaust emits poisonous carbon monoxide gas. High levels of carbon monoxide can collect
rapidly in enclosed areas such as a garage. Do not run
the scooter's engine with the garage door closed. Even
with the door open, run the engine only long enough
to move your scooter out of the garage.
Star ting the engine (kick star t)
To start your scooter using the kick start lever, follow the electric starting procedure except use the kick lever in place ot the
electric start button.
4. While squeezing the rear brake lever, kick down on the
kick start lever without rotating the throttle grip.
NOTE: If the scooter’s engine is warm and does not start
immediately, rotate the throttle grip to 1/8 to 1/4 open to
help the engine start.
Once the scooter is started, fold the kick start lever
back to its original position.
27
Page 30
OPERATION
Riding your scooter
NOTE: After starting, allow the engine oil to circulate before riding your scooter. Allow sufficient idling time after
warm or cold engine start-up before applying load or revving the engine. This allows time for the lubricating oil to
reach all the critical engine components.
NOTE: Review the scooter safety recommendations on
pages x and x before you ride.
You and your passenger should always wear appropriate
safety apparel such as a helmet, eye protection, gloves
and other clothes each time you ride the scooter. Never
wear any items that will adversely affect your safety.
Make sure flammable materials such as dry grass or
leaves do not come in contact with the exhaust system
when riding, idling, or parking your scooter.
1. Make sure the throttle is closed and the rear brake brake is
engaged before moving the scooter off the main stand.
28
2. Mount the scooter from the left side and sit on the seat
upright. Place both hands on the handlebars and touch the
ground with your left foot for stablity.
3. Release the rear brake and slowly rotate the throttle grip so
the engine power will be transmitted to the rear wheel
smoothly.
Page 31
OPERATION
Use the scooter’s turn signals to signal your intention to
merge into traffic. Always scan around you and in the rear
view mirrors so you are aware of other traffic. Use caution
as you merge into traffic, keeping to the right until you
match the pace of the traffic.
22
2
22
11
1
11
4. Control the scooter ’s speed with the throttle grip.
33
3
33
5. Limit the maximum speed of your scooter during the first
600 miles (1,000 km) of operation. Keep the road speed
below 25 MPH (40 KPH)
3 3
3 during this break-in period.
3 3
Rotating the grip towards you 1 will increase the scooter’s
speed.
Rotating the grip away from you 2 will decrease the
scooter’s speed.
NOTE: Decreaseing the scooter’s speed with a balanced
application of both brake levers and a reduction of throttle
will reduce the distance required to stop.
In hot weather the engine could overheat if it idles for a
long period of time. Very slow speed traffic could also
cause the scooter to overhead. To promote engine longevity permit the engine to cool in these situations.
Avoid sudden acceleration and prolonged high speed
use that can accelerate engine wear.
Moderate use will prolong the engine life of the scooter.
29
Page 32
OPERATION
6. Use both brake levers when slowing and stopping the
scooter. Release the throttle when braking.
NOTE: Decreaseing the scooter’s speed with a balanced
application of both brake levers and a reduction of throttle
will reduce the distance required to stop. Squeeze the levers lightly at first and then increase the pressure when
stopping.
7. When riding and turning the scooter, use smooth movements.
NOTE: At certain speeds your scooter will turn more
effectivly from leaning your body, rather than pressure
on the handlebars. Practice steering in an open area free
of traffic until you are familr with the handling charteristics
of your scooter.
Avoid using just one brake to stop the scooter, as this will
affect the tires’ grip.
Avoid sudden braking as this will also affect the tires’ grip
and can cause an accident.
30
Reduce your speed when riding on uneven or loose road
surfaces. When riding downhill, use less throttle and intermittently brake to control the vehicle’s speed. These conditions reduce tire grip and can cause an accident.
Page 33
OPERATION
Reduce your speed when riding your scooter in the rain.
Wet road surfaces reduce tire grip that greatly increases
the distance required for safe braking. The wet surface
also reduces the tires’ grip during cornering. Redcuced
tire grip will make it more difficult to control your scooter
and can cause an accident.
8. As you approach a turn, or plan to stop, use the turn signals well in advance to alert other traffic of your intentions.
Scan for other vehicles around you and slowly move to the
right side of the road. Close the throttle, apply the brake
smoothly, as the brake light will warn vehicles behind you
that you are braking.
9. When you stop the scooter, press the center of the turn
signal indicator switch to cancel the signal flashing. Turn
the ignition switch to the “ “ position to stop the engine
and turn off the scooter’s electrical system.
Never operate the igntion switch while riding your scooter.
If the igntion switch is turned during riding it could turn off
the engine and lights, possibly causing you to lose control
of the scooter.
With the lights off ,your scooter may not be visible to other
trafic, and this could cause a traffic accident.
Only operate the igntion switch when the scooter is not
moving.
31
Page 34
OPERATION
Parking your scooter
Use the following procedure and suggestions when parking
your scooter.
1. Place the scooter on level ground.
2. Stand on the left side of the scooter and grasp the handlebar with your left hand while grasping the side of the rear
rack with your right hand. Step down on the foot pad of the
main stand with your foot while pulling up and back on the
rear rack. This lifting motion will allow the scooter to rock
backwards and up onto the main stand.
The scooter may fall over if it is not parked on level
ground.
Make sure flammable materials such as dry grass or
leaves do not come in contact with the exhaust system
when parking your scooter.
Lock the steering of your scooter (see page 9) to reduce the risk of theft.
Do not park your scooter in a place that hinders traffic,
or that is unsafe to you or others.
32
Page 35
SECTION 4 MAINTENANCE
The impor tance of maintenance
Maintaining your scooter properly is essential for safe, economical and trouble-free riding. It will also help reduce air pollution and maximize fuel economy .
If your scooter tips over or becomes involved in a crash,
be sure your KYMCO dealer inspects all major parts,
even if you are able to make some repairs.
To help you properly care for your scooter, the following pages
in this Owner's Manual include a maintenance schedule to
help you make sure your scooter is serviced at the appropriate intervals.
These instructions are based on the assumption that your
scooter will be used exclusively for its designed purpose. Sustained high speed operation, or operation in unusually wet or
dusty conditions, will require more frequent service than specified in the maintenance schedule. Consult your KYMCO dealer
for recommendations applicable to your individual needs and
use.
NOTE: Always follow the inspection and maintenance recommendations and schedules in this Owner's Manual.
Improperly maintaining this scooter or failing to correct a problem before you ride could result in a crash in
which you could be seriously hurt or killed.
When performing maintenance on your scooter you may
need to start the engine. Running your scooter's engine indoors or in a garage can be hazardous. Exhaust
gas contains carbon monoxide, a gas that is colorless
and odorless, and can cause death or severe injury.
Operate the engine only where there is adequate ventilation, preferably outdoors.
33
Page 36
MAINTEN ANCE
Maintenance schedule
Perform the pre-ride inspection (see pages 18 - 25) at each scheduled maintenance period. This interval should be judged by
odometer reading or months, whichever comes first.
Maintenance schedule legend (see page 35):
I: INSPECT AND CLEAN, ADJUST, LUBRICATE OR REPLACE IF NECESSARY
C: CLEAN R: REPLACE A: ADJUST L: LUBRICATE T: TIGHTEN
The maintenance schedule on page 35 specifies the maintenance required to keep your Sento 50 scooter in peak operating
condition. Maintenance work should be performed in accordance with KYMCO standards and specifications by properly trained
and equipped technicians. Your KYMCO dealer meets all of these requirements.
* Should be serviced by your KYMCO dealer , unless you have the proper tools, service data and are technically qualified.
* * In the interest of safety , we recommend these items be serviced only by your KYMCO dealer . KYMCO USA recommends
that your KYMCO dealer road test your scooter after each periodic maintenance service is completed.
Maintenance schedule notes (see page 35):
1. At higher odometer readings, repeat at the frequency interval listed here.
2. Service more frequently if the scooter is ridden in unusually wet or dusty areas.
3. Service more frequently when riding in rain or at full throttle.
4. “PRI” indicates that the item should be checked as part of the Pre-ride Inspection (see page 18 through 29)
5. “See page” indicates on which page of the Owner ’s Manual you will find information about the required maintenance.
6. “Dealer” indicates maintenance or service procedure that should be performed by your KYMCO dealer .
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Page 37
MAINTEN ANCE
Maintenance schedule - Sento 50
ITEM
MILEAGE
200 mi 600 mi 1850 mi 3100 mi 4300 mi 5500 mi 7000 mi Pre-ride See
300 km 1000 km 3000 km 5000 km 7000 km 9000 km 11000 km inspection page
Engine oil * R R R R R R R PRI 19, 40
Engine oil strainer * C - C - C - C - 40, 41
Gear oil * R - R - R - R - 42
Spark plug * C I C R C I R - 43
Valve clearance ** A - A - A - A - Dealer
Carburetor ** I - I - I - I - Dealer
Drive belt ** - - - - I - - - Dealer
Air cleaner * C I R I R I R - 37
Battery * I I I I I I I PRI 38, 39
Fuel filter ** - - - - R - - - Dealer
Brake system ** I I I I I I I PRI 19, 43
Tires ** I I I I I I I PRI 21, 36
Bolts & nuts * T I I T I I T PRI 25
I: INSPECT AND CLEAN, ADJUST, LUBRICATE OR REPLACE IF NECESSARY
C: CLEAN R: REPLACE A: ADJUST L: LUBRICATE T: TIGHTEN
35
Page 38
MAINTEN ANCE
Tires
Failure to follow these warnings may result in an accident due to tire failure. The tires on your scooter are a
crucial link between your scooter and the road. Y ou and
your passenger's personal safety are dependant upon
the condition of your scooter's tires.
Follow these instructions:
Check tire condition and pressure, and adjust the
inflation pressure before each ride.
Avoid overloading your scooter.
Replace a tire when worn to the specified limit, or
if you find any damage such as cuts or cracks.
Always use the proper size and type of tires as
specified in this Owner's Manual.
Balance the wheel after tire installation.
Read this section of Owner's Manual carefully.
Failure to perform a reasonable break-in of the tires
could cause tire slip and loss of control.
Use extra care when riding on new tires as the grip will
be limited. Perform proper break-in of the tires, as stated
in the break-in recommendation section of this manual.
Avoid hard acceleration, hard cornering, and hard braking for the first 100 miles (160 km).
NOTE: Check the tire inflation pressure and tire tread condition at the periods listed in the periodic maintenance
schedule. For maximum safety and good tire life, the tire
pressures should be inspected more often.
Tire pr essure
Insufficient air pressure in the tires not only accelerates tire
wear but it also af fects the stability of your scooter . Underinflated tires make smooth cornering difficult and overinflated
tires decrease the amount of tire in contact with the ground,
which can lead to skids and loss of control. Make sure that the
tire pressures on your scooter are within the specified limits at
all times.
NOTE: Tire pressure should only be adjusted when the
tires are cold.
Front tire (rider only): 17.5 PSI (1.25 kg/cm
Rear tire (rider only): 29.0 PSI (2.0 kg/cm
2
)
2
)
Front tire (rider & passenger): 25.0 PSI (1.75 kg/cm2)
2
Rear tire (rider & passenger): 32.0 PSI ( 2.25 kg/cm
)
36
Page 39
MAINTEN ANCE
Air c leaner f ilter element
The air cleaner filter element should be serviced at regular
intervals. Service the element more often when riding in unusually wet or dusty areas.
1. Open seat (see page 9).
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1
11
11
1
11
22
2
22
11
1
11
11
1
11
11
1
11
11
1
11
11
1
11
2. Remove air cleaner cover screws 1.
3. Remove the air cleaner case cover 2.
4. Remove the air cleaner element 3 by removing the retaining bolts 4.
5. If lightly soiled, clean the filter with compressed air . If very
dirty (or if the filter is at the replacement interval per the maintenance schedule) discard the air cleaner element.
44
4
44
33
3
33
6. Install the cleaned or new air cleaner element. Use the KYMCO
genuine air cleaner element or an equivalent air cleaner element specified for your scooter .
7. Complete the installation by reinstalling the air cleaner parts in
the reverse order of removal.
Improper installation for the filter can cause water or
dirt to enter the engine causing premature wear.
Using the wrong KYMCO air cleaner element or a nonKYMCO air cleaner element which is not of equivalent
quality may cause premature engine wear or performance problems.
44
4
44
44
4
44
37
Page 40
MAINTEN ANCE
Fuel hoses
Check the fuel hoses and fitting for any signs of leakage.
11
1
11
22
2
22
1. Check for leakage at the fuel tank 1.
2. Check for leakage from the fuel hoses, clamps and joints 2.
Replace any fuel system component that are leaking fuel.
Contact your KYMCO dealer for fuel system service and
repairs.
Battery
Your KYMCO scooter is equipped with a maintenance-free
(sealed) battery so it is not necessary to check the battery's
electrolyte level or add distilled water .
NOTE: If your battery seems weak and/or is leaking electrolyte (causing hard starting or other electrical troubles),
contact your KYMCO dealer immediately .
Your battery is a maintenance-free type and can be permanently damaged if the cap strip is removed.
Charge the battery with a charger specifically designed
for use with a maintenance-free type battery. Using another type of charger can damage the battery.
Y our scooter's battery gives off explosive hydrogen gas
during normal operation. A spark or flame can cause
the battery to explode with enough force to kill or seriously injure you. Wear protective clothing and a face
shield, or have a qualified technician perform the battery maintenance.
38
Page 41
MAINTEN ANCE
Battery r emoval & installation
The battery is in the battery box below seat.
NOTE: Always keep ignition switch OFF when servicing
the battery.
44
4
44
33
3
33
1. When removing the battery for charging or replacement, dis-
connect the negative (-) terminal lead 3 from the battery
first, then disconnect the positive (+) terminal lead 4.
2. When installing the battery , connect the positive terminal
lead (+) first, then the negative terminal lead (-).
Fuse r eplacement
FUSE SIZE: 7A
1. Open the fuse holder 5.
Pull the fuse holder clips
6 out of the holder.
2. Slide the fuse 7 out of
the holder clips.
3. Install a new fuse 8 of
the proper specification
into the holder clips.
4. Press the fuse and the
holder clips 6 back into
the holder.
5. Close the fuse holder 5
and set it back in place.
(One MAIN fuse & one SPARE)
55
5
55
55
5
55
66
6
66
77
7
77
66
6
66
88
8
88
Fuses
When frequent fuse failures occur, it usually indicates a short
circuit or an overload in the electrical system.
NOTE: See your KYMCO dealer for electrical system
diagnosis and repair.
Never use a fuse with a different rating from that specified. Serious damage to the electrical system or a fire
hazard may result, causing a dangerous loss of lights
or engine power.
39
Page 42
MAINTEN ANCE
Engine oil
Engine oil recommendation
Use a premium quality 4-stroke engine oil to ensure longer
service life of your scooter. Only use oils that have a SJ rating
per the API service classification.
Engine oil capacity: 0.85 qt (0.8 L)
Engine oil viscosity: SAE 15W-40
If this viscosity is not available, select an alternative engine
oil according to the chart shown below.
The engine and related components can become very hot.
Use care when inspecting or adjusting the oil level to avoid
injury. If needed, let the engine and exhaust system cool
before working in those areas.
Prolonged contact with used engine oil can cause skin
cancer. Although rare, this possibly exists if you handle oil
on a frequent basis. Thoroughly wash your hands with soap
and water as soon as possible after handling used oil.
ENGINE OIL VISCOSITIES
Engine oil level inspection
Check the engine oil level each day before riding your scooter
(see page 19).
40
Engine oil replacement
Engine oil quality is the primary factor affecting engine longevity. Change your scooter's engine oil as specified in the maintenance schedule (see page 35).
NOTE: When riding your scooter in very dusty conditions,
oil changes should be performed more frequently than
specified in the maintenance schedule.
NOTE: Always dispose of used engine oil in a environmentally responsible manner. You should take the drained
oil in a sealed container to your local recycling center or
service station for reclamation. Do not throw the oil in the
trash, pour it on the ground, or pour it down a drain.
NOTE: Change the engine oil with the engine at normal
operating temperature with the scooter positioned on its
main stand to assure complete and rapid draining.
Page 43
MAINTEN ANCE
11
1
11
1. Remove the oil filler/dipstick 2 from the right crankcase cover.
2. Place a suitable container (drain pan) under the left crankcase. Remove the drain bolt 1 to drain the oil.
3. Replace the drain bolt 1. Tighten it to the specified torque.
Oil drain plug torque: 18 lb-ft (25 N-m)
4. Add engine oil through the oil filler/dipstick hole.
Engine oil capacity: 0.85 qt (0.8 L)
Engine oil viscosity: SAE 15W-40
Do not overfill the engine with oil. Overfilling the engine can cause oil leaks and/or oil contamination of
the air filter element. Always make sure the oil level is
above the "L" mark but not higher than the "F" mark
on the dipstick.
NOTE: When draining the engine oil, remove the oil
strainer from the bottom of the crankcase and clean the
screen.
22
2
22
F
L
5. Wipe the dipstick 2 off with a clean cloth and reinstall it in its
hole, but
dip stick to the engine case until it touches the case.
6. Remove the dip stick and visually inspect the oil level on the
stick. The engine oil level should be above the "L" mark but
not higher than the "F" mark. Add or remove oil as required.
7. Replace the oil filler/dipstick and tighten it securely .
NOTE: After changing the engine oil, the oil service indicator light should be reset (see page 13).
do not thread it into the engine case. Push the
41
Page 44
MAINTEN ANCE
Transmission f luid change
1. Place the scooter on its main stand.
11
1
11
22
2
22
3. After the fluid has drained out, reinstall the drain bolt with a
new sealing washer and tighten it to the specified torque.
Transmission fluid drain bolt torque: 15 lb-ft (20 N-m)
4. Remove the transmission fluid filler bolt 2.
5. Add the exact specified fluid through the fluid filler hole 3.
Transmission fluid type: SAE 90
Transmission fluid capacity: 0.12 qt (0.11 L)
NOTE: The fill amount specified is the amount to use after
completely draining the used transmission fluid.
2. Place a suitable container (drain pan) under the transmis-
sion case on its left side. Remove the drain bolt 1 to
drain the fluid.
22
2
22
33
3
33
42
Do not exceed the specified amount when adding transmission fluid. If too much fluid is added to the transmission case it could be forced into the air cleaner assembly during operation, causing air filter contamination and poor engine performance.
6. Install the transmission fluid filler bolt with a new sealing washer
and tighten it to the specified torque.
Transmission fluid filler bolt torque: 15 lb-ft (20 N-m)
Using the wrong transmission fluid type or viscosity
may cause premature transmission component wear.
Page 45
MAINTEN ANCE
Spark plug
Remove the carbon deposits from the spark plug
with a small wire brush or a spark plug cleaning
machine. After cleaning (or when installing
a new spark plug) readjust the spark plug
gap to specified limit by using a spark plug
gap thickness gauge. The spark plug
should be replaced periodically. Under normal usage, a spark plug's porcelain tip should
appear light brown or tan in color. If the spark plug porcelain
tip is very white or glazed appearing, then the spark plug has
been operating too hot. In such a situation, you
should replace the standard spark plug with a spark
plug that has a colder heat range (usually a higher
number; consult with your KYMCO dealer when
selecting an alternate spark plug).
Recommended spar k plug
Spark plug type: CR7HSA
Spark plug gap: 0.024 - 0.028 in
(0.6 - 0.7 mm)
Brake f luid
Your scooter is equipped with a hydraulic front brake. Check
the brake fluid level window on the master cylinder reservoir
on the handlebars per the maintenance schedule.
UPPER LEVEL
LOWER LEVEL (add)
Adding brake fluid:
1. Remove the two Phillips screws retaining the master cylinder cap. Remove the cap.
2. Add the specified type of brake fluid to bring the level up to
the “UPPER” level in the window .
3. Wipe the master cylinder cap and gasket with a clean cloth
and reinstall the cap, tightening the screws securely .
Brake fluid type: DOT 4
An improper spark plug may have an incorrect fit or
heat range for your engine. This may cause severe engine damage which will not be covered under warranty.
Never use a spark plug with an improper heat range, as
severe engine damage may result.
Do not mix brake fluid types. Doing so may cause brake
failure and could result in an accident.
Do not allow brake fluid to touch the body work as it
will damage the painted surface.
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MAINTEN ANCE
Cleaning
Clean your scooter regularly to protect the surface finishes
and inspect for damage, wear , and oil, coolant or brake fluid
leakage.
Avoid cleaning products that are not specifically designed for
scooter, motorcycle, or automobile surfaces. Nonspecific cleaners may contain harsh detergents or chemical solvents that
could damage the metal, paint, and plastic on your scooter .
NOTE: If your scooter is still warm from recent operation,
give the engine and exhaust system time to cool off before washing. Avoid the use of high pressure water spray
(typical in coin-operated car washes), as the powerful
spray can damage components on your scooter.
Washing your scooter
1. Rinse the scooter thoroughly with cool water to remove any
loose dirt.
2. Clean the scooter with a sponge or soft cloth using cool water .
Avoid directing water at muffler outlets and electrical parts.
3. Clean the plastic parts using a cloth or sponge dampened with
a solution of mild detergent and water . Rub the soiled area
gently, rinsing it frequently with fresh water . Take care to keep
brake fluid or other chemical solvents away from the scooter ,
as they will damage the plastic and painted surfaces.
NOTE: The inside of the headlight lens may become clouded
immediately after washing the scooter. Moisture condensation inside the headlight lens will disappear gradually as it is
heated by the headlight. After washing, run the engine while
keeping the headlight on to dissipate any condensation.
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MAINTEN ANCE
4. After cleaning, rinse the scooter thoroughly with plenty of
clean water. This rinsing is required to remove detergent
residue which can corrode alloy parts.
5. Dry the scooter and then start the engine, allowing it to run
for several minutes.
6. Test the brakes before riding the scooter . Several applications of the brakes may be necessary to restore normal braking performance.
NOTE: Due to water on the brake components, braking
efficiency may be temporarily impaired immediately after
washing the scooter. Anticipate longer stopping distances
to avoid a possible accident.
Finishing touches:
After washing your scooter , consider using a commerciallyavailable spray cleaner/polish or a quality liquid or paste wax
to enhance and protect the paint's finish. Use only a nonabrasive polish or wax made specifically for scooters, motorcycles,
or automobiles. Apply the polish or wax according to the instructions on the container .
Removing r oad salt
The salt used in some communities to prevent road icing can
become very corrosive to your scooter. Wash your scooter as
soon as possible if it comes in contact with road salt (or sea
water).
1. Clean the scooter using cool water (see page 44). Do not
use warm water; as this will increase the corrosive effect of
the salt.
2. Dry the scooter and protect painted and metal surfaces
with wax or polish.
Painted alumin um wheel maintenance
Even if protected by paint, aluminum may corrode from contact with dirt, mud, or road salt. Clean the scooter's wheels
with a wet sponge and mild detergent. Avoid stiff brushes, steel
wool, or cleaners containing abrasives or chemical compounds.
After washing, rinse with plenty of water and dry with a clean
cloth . Apply touch-up paint to the wheels where damage has
occurred.
Exhaust pipe maintenance
The exhaust system is stainless steel, but it can become stained
by oil or mud. If necessary , remove heat stains with a liquid
kitchen-counter abrasive.
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MAINTEN ANCE
STORAGE GUIDE
Extended storage, such as for the winter months, requires that
you take certain steps to reduce the ef fects of deterioration
from the non-use of your scooter. Whenever possible, perform
any necessary periodic maintenance or repairs before storage
so the scooter will be in good condition for riding when it is
removed from storage.
Storage
1. Change the engine oil and filter .
2. Drain the carburetor (if equipped) and empty the fuel tank
into an approved gasoline container using a commercially
available hand siphon or an equivalent method. Spray the
inside of the tank with an aerosol rust-inhibiting oil. Close
the fuel filler cap on the fuel tank
Gasoline is highly flammable and explosive. You can
be burned or seriously injured when handling fuel. Stop
the engine and keep heat, sparks, and flame away. Refuel the scooter outdoors and wipe up any spills immediately.
46
3. To prevent rusting in the cylinder , perform the following:
Remove the spark plug cap from the spark plug, and use tape
or string to secure the cap to any convenient plastic body part
so that it is positioned away from the spark plugs.
Remove the spark plug from the engine and store it in a
safe, dry place. Do not connect the spark plug to the spark
plug cap.
Pour a tablespoon (15 - 20 cc) of clean engine oil into the
cylinder and cover the spark plug hole with a piece of cloth.
Crank the engine several times to distribute the oil.
Reinstall the spark plug and spark plug cap.
5. Remove the battery. Store it in an area protected from freezing temperatures and direct sunlight. Slow charge the battery once a month (use a quality charger designed for use
on a maintenance-free type battery).
6. Wash and dry the scooter . Wax all painted surfaces. Coat
the chrome or bare aluminum parts with rust inhibiting oil.
7. Inflate the tires to their recommended pressures. Place the
scooter on blocks to raise both tires off the ground.
8. Cover the scooter (don't use plastic or other coated materials) and store in an unheated area, free of excessive moisture, with a minimum of daily temperature variation. Do not
store the scooter in direct sunlight, as the sun's UV rays
can damage the body work and other components.
Page 49
Removal fr om stor age
1. Uncover and clean the scooter .
2. Change the engine oil if more than 1 month has passed
since the start of storage.
3. Charge the battery as required (use a quality charger designed for use on a maintenance-free type battery). Install
the battery.
4. Drain any excess aerosol rust-inhibiting oil from the fuel
tank. Fill the fuel tank with fresh gasoline.
5. Perform all the pre-ride inspection checks (see pages 18 -
25). Test ride the scooter at low speeds in a safe riding
area, away from traffic.
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MAINTEN ANCE RECORD
DATE MILEAGE S ERVICE PERFORMED & NO TES
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SPECIFICATIONS - SENT O 50
Dimensions
Overall length ............................................. 67 in (1700 mm)
Overall width ................................................. 28 in (710 mm)
Overall height ............................................. 41 in (1050 mm)
Wheel base .............................................. 46.5 in (1180 mm)
Seat height ................................................ 29.1 in (791 mm)
Dry weight ..................................................... 183 lbs (83 kg)
Capacities
Engine oil ............................................. .. 0.84 US qt. (0.8 L)
Transmission oil ...................................... 0.11 US qt (0.12 L)
Fuel tank ................................................... 1.3 US gal (5.0 L)
Maximum weight capacity ...........................248 lbs (113 kg)
Engine
Type ...................................... Four-stroke, air-cooled SOHC
Displacement ....................................... 49.5 cm3 (3.0 cu. in)
Bore and stroke .................. 1.53in X 1.61 in (39 X 41 mm)
Compression ratio .......................................................... 11:1
Spark plug .............................................................. CR7HSA
Idle peed .............................................................. 2000 RPM
Cooling system ............................................ Forced Air (fan)
Starting system ... Electric starter motor (kick-start back-up)
Transmission ................................................ Automatic CVT
Chassis
Tire size, front ......................................................... 90/90-10
Tire size, rear .......................................................... 90/90-10
Chassis material ............................................................Steel
Front suspension .........................................Telescopic forks
Rear suspension .............................. Single shock absorber
Brake (front) ........................................................... Disc type
Brake (rear) ................................................. Drum/shoe type
Electrical
Ignition type .............................................................. DC-CDI
Battery ..................................................................... 12v-5Ah
Headlight ........................................................... 12v 60/55W
Tail/brake light ................ 12v0.47W LED & (12v4.4W LED)
Turn signal light ................................................ 12v 10W X 4
Position light ............ 12v5W (front) & 12v0.47W LED (rear)
Main Fuse ......................................................................... 7A
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EMISSION CONTROL & WARRANTY INFORMA TION
Crankcase Emission Contr ol System
Your Sento scooter’s engine is equipped with a closed crankcase system. Blow-by gases are routed back in to the combustion chamber via the intake system. This system does not allow the blow-by gases to enter the atmosphere.
Exhaust Emission Contr ol System
The exhaust emissions from your Sento scooter are controlled by engine design, factory-set fuel delivery , ignition settings,
and exhaust system design. This system also includes a catalyzer in the exhaust system.
Noise Exhaust Emission Contr ol System
The engine, intake and exhaust systems of your Sento scooter were designed to comply with federal, state and local noise
level requirements. Do not modify the engine ,intake or exhaust components, as doing so will affect compliance these noise
level requirements.
Please do not modify or change any KYMCO-designed components that may alter the sound or emission level from
your Sento scooter.
KYMCO LIMITED WARRANTY
NOISE EMISSIONS
KYMCO USA Inc, 5 Stan Perkins Road, Spartanburg, SC 29307, USA warrants that this vehicle was designed, manufactured and equipped so that when new , it would conform with the applicable Motorcycle Noise Regulations of the U.S. EP A
Environmental Protection Agency.
This warranty is not limited to any particular part, component or system of the vehicle. Defects in design, assembly, or in any
part, component or system of the vehicle which, at the time of sale to the first purchaser , caused noise emission levels to
exceed applicable Federal standards in effect at the time of manufacture, are covered by this warranty .
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KYMCO LIMITED WARRANTY
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INDEX
Accessories & Modifications .................................. 6
Air Filter Maintenance .......................................... 37
Battery ........................................................... 38 - 39
Brake Fluid Level Inspection ................................ 43
Brake Inspection ........................................... 19 - 20
Break-in Recommendations ................................. 16
CA Prop 65 Warning ............. (inside of front-cover)
Chassis Inspection ............................................... 25
Cleaning Your Scooter .................................. 44 - 45
Electric Start Button .............................................. 10
Emission Information & EP A Warranty ................ 50
Engine Oil Inspection ........................................... 19
Engine Oil Level Inspection & Change ........ 40 - 41
Engine Oil ..............................................................40
Engine-stop Switch .................................................9
Forward ................................................................... 2
Fuel Hoses ............................................................ 38
Fuel Level / Filler Cap .......................................... 22
Fuses ..................................................................... 39
Headlight Dimmer Switch ..................................... 10
Helmet Posts ......................................................... 12
52
Horn & Lights Inspection ...................................... 24
Identification Numbers Record(inside of back-cover)
Ignition Switch ......................................................... 9
Importance of Maintenance ................................. 33
Index ......................................................................52
Instrument Inspection ...........................................23
Instruments ........................................................... 13
Keys ......................................................................... 8
KYMCO Limited Scooter W arranty ...................... 51
Left-hand Handlebar Switch ................................. 10
Load Limits & Guidelines ....................................... 5
Locations of Parts & Controls ................................ 7
Main Stand ............................................................ 12
Maintenance Record ............................................ 48
Maintenance Schedule ................................ 34 - 35
Manual Icon Legend ............. (inside of front-cover)
Parking Your Scooter ............................................32
Passenger Pegs ................................................... 14
Pre-ride Inspection ........................................ 18 -25
Riding Your Scooter ...................................... 28 - 31
Right-hand Handlebar Switch ................................ 9
Scooter Safety .................................................. 3 - 4
SECTION 1 - SAFETY ..................................... 2 - 6
SECTION 2 - CONTROLS & FEA TURES ..... 7 - 15
SECTION 3 - OPERA TION .......................... 16 - 32
SECTION 4 - MAINTENANCE ..................... 33 - 48
Security Combination Lock .................................. 14
Service Indicator Light .......................................... 13
Spark Plug ............................................................. 43
Specifications ........................................................49
Starting the Engine (electric start) ............... 26 - 27
Starting the Engine (kick start) ............................. 27
Steering & Handlebar Inspection ......................... 23
Storage .......................................................... 46 - 47
Table of Contents .................................................... 1
Tire Break-in .......................................................... 17
Tire Pressure .........................................................36
Tires ................................................................ 22, 36
Transmission Fluid Inspection & Change ............ 42
Turn Signals .......................................................... 11
Turn Signal Switch ................................................ 10
Under-seat Storage Compartment ...................... 11
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Identification Numbers Record
22
2
11
1
11
22
3
1. IGNITION SWITCH KEY IDENTIFICATION NUMBER
The ignition switch key identification code is stamped on tab 1 supplied with the key. If you require a replacement key , you will
need this code to obtain a new key from your authorized KYMCO dealer. Record the key number in the box above.
2. SECURITY LOCKOUT COMBINATION CODE
The security combination code is stamped on the tab 2 supplied with the scooter. Record the 3-digit code in the boxes above.
3. VEHICLE IDENTIFICATION NUMBER (VIN)
4. ENGINE SERIAL NUMBER (ESN)
Record the Vehicle Identification Number 3 and Engine Serial Number 4 in the boxes above for future reference (to assist
you in ordering parts from your authorized KYMCO dealer or for reference in case the vehicle is stolen).
NOTE: Your scooter’s keys may differ in appearance from those shown in this manual.
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5 Stan Perkins Road
Spartanburg, SC 29307
Telephone: (888) 235-3417
FAX: (864) 327-4745
Prepared: July 2008
T300-SD10RA-US-5
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