SKY TEAM CORPORATION LTD.
1104 CARNIVAL COMMERCIAL BLDG.
18 JAVA ROAD NORTH POINT HONGKONG
TEL:00852 25089428
FAX:00852 25089478
EMAIL:SKYTEAM_HK@HOTMAIL.COM
HTTP://WWW.SKYTEAM.CN
Respectable consumer:
Thank you for purchasing this Skyteam motorcycle and welcome to the family of Skyteam motorcycle
riders.
Skyteam motorcycle, famous for its reasonable design, advanced process and beautiful appearance,
are sold well at home and abroad, and are highly appraised by old and new customers.
Skyteam motorcycle, as an ideal riding tool instead of walk and a light-duty transportation tool, will
provide happiness for your work.
The proper operation and simple maintenance that your motorcycle requires is outlined in this manual,
read carefully this manual before riding the motorcycle, it will provide you with efficient help for operating
and maintaining your Skyteam motorcycle. To ensure your motorcycle in good condition and safe riding,
use the genuine Skyteam accessories. If you have any questions, or if you ever need a special service or
repairs, remember that your Skyteam dealer knows your motorcycle best and is dedicated to your complete
satisfaction.
Welcome to your opinions and suggestions for improving Skyteam motorcycle, wish our friendship
forever and ever.
FOREWORD
ALL INFORMATION IN THIS MANUAL IS SUBJECT TO CHANGES
WITHOUT PRIROR NOTICE FROM THE MANUFACTURER
TABLE OF CONTENTS
Important precautions
Consumer information
Component locations
Controls
Key
Ignition switch
Instrument panel
Left handlebar
Right handlebar
Seat lock
Fuel tank cap
Fuel cock
Kick starter lever
Rear brake pedal
Gearshift lever
Steering lock
Helmet holder
Fuel and engine oil recommendation
Running-in
Inspection before riding
Riding tips
Starting the engine
Starting off
Drive on slope
Braking and parking
Checks and maintenance
Periodic maintenance chart
Lubrication
Battery and fuse
Air cleaner
Spark plug
Transmission oil
Carburetor
Throttle cable adjustment
Drive chain
Brakes
Rear brake switch
Tires
Change of bulb
Troubleshooting
Specifications
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3
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12
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14
15
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16
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18
19
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21
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CONSUMER INFORMATION
ACCESSORY INSTALLATION AND SAFETY
PRECAUTION TIPS
There are great varieties of accessories available
to Skyteam owners. The addition of unsuitable
accessories can lead to unsafe operation
conditions. For proper installation of accessories,
we have laid down some principles which will help
you for the correct choice and installation of
accessories.
(1)If you want to install a accessory which will result
in a extra weight or a aerodynamic effect to your
motorcycle, try to install it as low as possible and
as close as possible to the center of gravity of your
motorcycle. Check carefully the holder for installing
accessories to make sure for its firmness. The infirm
installation will lead to unstable and dangerous
conditions due to weight deviation.
(2)Check the net clearance and turning angle to
make sure that they are adequate. The improper
load, which may occurs after installing accessories,
will very likely lower their safety factors, Checks
should also be made that this improper load will
not hinder the idling, tuning and other control
actions.
(3)Fixing the accessories on handlebars or front
fork will result in unstable operation. This extra
weight will reduce the maneuverability of your
motorcycle during turning operations, meanwhile,
this extra weight will also cause unstable condition
due to vibration at the front end. Therefore, fixing
accessories on handlebars or front fork should be
minimized.
(4)Things like wind glass, windshield, waist support,
bags across seat and suitcases all have a
aerodynamic effect on the stability of your
motorcycle, when there is a side wind or large
vehicles passing by. The improper installation or
bad design of accessories will affect your driving
3
BREAK-IN INFORMATION FOR YOUR MOTORCYCLE
The fist 1,600km is the most important in the life of your motorcycle. Proper running - in operation
during this time will help ensure maximum life and performance of your new motorcycle.
Motorcycle reliability and performance depend on special care and restraint exercised during running-
in period. It is important that you avoid operating the engine in the manner which could expose the
engine parts to excessive heat.
Please refer to the "running-in" section for specific running - in recommendation.
Please read this manual and following its instructions carefully.
To emphasize special information, the words WARNING, CAUTION and NOTE carry special meaning
and should be carefully reviewed.
IMPORTANT PRECAUTIONS
WARNING:
CAUTION:
NOTE:
The personal safety of the rider may be involved, disregarding this information could
result in injury to the rider.
These instructions point out special service procedures or precautions that must be
followed to avoid damaging the machine.
These provide special information to make maintenance easier or important instructions
clearer.
2
CHECKS BEFORE RIDING
Review thoroughly the instructions in the
"CHECK BEFORE RIDING" section of this manual.
Do not forget to perform all the safety checks to
ensure the safety of the rider.
FAMILIARIZE YOURSELF WITH THE
MOTORCYCLE
Your riding skill and your mechanical knowledge
form the safe riding practices. We suggest that you
practice riding your motorcycle in an non - traffic
situation without obstacles until you are thoroughly
familiar with your machine and its controls.
Remember that practice makes perfect.
KNOW YOUR SAFETY SPEED 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.
BE EXTRA SAFETY CONSCIOUS ON BAD
WEATHER DAYS
Riding on bad weather days, especially wet
ones, requires extra caution. Braking distance
doubles on a rainy day. Stay off the painted surface
marks, Manhole covers and greasy appearing
areas as they can be especially slippery. Use
extreme caution at railway crossings and on metal
grating and bridges. Whenever in doubt about road
condition. SLOW DOWN!
AUTOMOBILE/MOTORCYCLE ACCIDENTS
PREVENTION
Many automobile/motorcycle accidents happen
because the automobile driver does not "SEE" the
motorcyclist.
Make yourself conspicuous to help avoid the
accident that wasn't your fault:
Wear bright or reflective clothing.
Don't ride in another motorist's "blind spot".
Signal before you make a turn or lane change.
Your size and maneuverability can surprise other
motorists.
5
safety. Therefore, you should be careful for the
choice and installation of accessories.
(5)Certain accessories displace the rider from his
normal riding position. This will not only limits the
freedom of movement of the rider, but also his
control ability.
(6)Extra electrical accessories may overload the
existing electrical system. Severe overloads may
damage the wiring harness or create a dangerous
situation due to the loss of electrical power during
the operation of the motorcycle.
When carrying a load on the motorcycle, mount
it as low as possible and as close as possible to
the motorcycle. An improperly mounted load can
create a high center of gravity which is very
dangerous and make the motorcycle difficult to
handle. The size of a load can affect the
aerodynamics and the handling of the motorcycle.
Balance the load between the left and right side of
the motorcycle and fasten is firmly.
SAFE RIDING RECOMMENDATONS FOR
MOTORCYCLE RIDERS
Motorcycle riding is a great joy and an exciting
sport. Motorcycle riding also requires that some
extra precautions be taken to ensure the safety of
the rider. These precautions are:
WEAR A HELMET
Motorcycle safety equipment starts with a quality
safety helmet. One of the most serious injuries that
can happen is a head injury. Always wear a properly
approved helmet. You should also wear suitable
eye protection.
RIDING APPAREL
Tight, fancy clothing can be uncomfortable and
unsafe when riding your motorcycle. Choose good
quality motorcycle riding apparel when riding your
motorcycle.
4
The frame and/or engine serial numbers are
used to register the motorcycle. They are also used
to assist your dealer when ordering parts or
referring to special service information.
The frame number (1) is stamped on the steering
stem head right surface. The engine serial number
is stamped on the left side of crankshaft and the
motorcycle nameplate is stamped on the right side
center of frame.
Please write down the numbers here for your
reference.
SERIAL NUMBER LOCATION
7
MODIFICATION
Modification of the motorcycle, or removal of
original equipment may render the vehicle unsafe
or illegal. Obey the local regulations for available
equipment.
STEERING STEM REMOVAL
In order to reduce the occupied space, the
motorcycle steering stem can be removed or bent.
Turn off the steering stem tightening wheel (1),
making the locating boss leave the groove, then
bend the lower steering stem as per the direction
shown in the figure, making the boss coincide with
the groove and screwing up the steering stem
tightening wheel. On the contrary, the steering stem
can be returned to its original position.
6
After the steering stem is located, make sure
to screw up the steering stem tightening wheel.
WARNING
COMPONENT LOCATION
9
Throttle grip
Instrument panel Front brake lever
Night driving camp switch
Engine start switch
Steering stem tightening wheel
Lever, chokeLever, clutch
Dimmer button
Turning signal switch
Horn button
8
Frame No.
Engine No.
11
Steering lock
Ignition switch
Helmet holder
Seat lock
Passenger pedalRear shock-absorberGear shift lever
Air cleaner
Battery and fuse
Fuel tank
Driver pedal
Rear brake pedalEngine oil filler/dipstick
Kick starter lever
10
HIGH BEAM INDICATOR LIGHT(4)
This indicator light comes on when the headlight
high beam is turned on.
LEFT/RIGHT TURNING SIGNAL INDICATOR
LIGHT(5)
This indicator light comes on when the direction
signal turns left or right.
LEFT HANDLEBAR
DIMMER SWITCH(1)
Turning the right handlebar in " " position, in
this time, the front and rear lightening lamps come
on to give the warning. Shifting the dimmer switch
into " " position, the headlamp high beam indicator
light comes on. Shifting the dimmer switch into " "
position, the front and rear position indicator lights
come on.
TURN SIGNAL SWITCH(2)
Turning the switch into " " position, the left turn
signal indicator will flash intermittently, shifting the
switch into " " position, the right turn signal indicator
will flash intermittently, while in central position, the
left and right turn signal indicator lamps do not work
altogether.
13
ST50-6, ST110-6 ST125-6
CONTROLS
KEY
This motorcycle comes equipped with a pair of
identical ignition keys. Keep the spare key in a safe
place.
IGNITION SWITCH
There are two positions for ignition switch:
"OFF" POSITION
All electrical circuit is disconnected.
"ON" POSITION
All electrical circuits are connected and the
engine can be started.
INSTRUMENT PANEL
SPEEDOMETER(1)
The speedometer indicates the road speed in
kilometers per hour.
ODOMETER(2)
The odometer registers the total distance that
motorcycle has been ridden.
NEUTRAL INDICATOR LIGHT(3)
The green neutral indicator light comes on when
the transmission is in neutral. When the
transmission if engaged in other gear, this light goes
out.
ST50-6 ST110-6, ST125-6
12
(1)ignition switch
THROTTLE GRIP(4)
The throttle grip is used to control the engine
speed. Twist the throttle grip toward yourself to
increase the engine speed. Turn it away from
yourself to decrease the engine speed.
SEAT LOCK
To unlock the seat, insert the ignition key (2) into
the lock (1) and turn it counterclockwise.
FUEL TANK CAP
To open the fuel tank cap, open the seat and
turn the cap (3) along the lines of "A" to "ON"
position. To close the fuel tank cap, turn it along
the lines of "B" to "OFF" position.
FUEL COCK
The type of motorcycle is equipped with manual
acting fuel lever. There are three positions: "ON",
"RESERVE" and "OFF".
15
AB
Do not overfill the fuel tank. Do not fill the fuel
tank above the bottom of the filler tube as shown
in the illustration.
When refueling, always shut the engine off
and turn the ignition key to the "OFF" position.
Never refuel near an open flame.
Take care not to spill gasoline during refueling.
WARNING
NIGHT DRIVING LAMP SWITCH(1)
" ": When the engine is in working condition,
the headlamp, instrument lightening lamp and tail
lamp come on simultaneously.
" ": When the engine runs or goes out, the
headlamp and tail lamp can be lighted up to give a
warning.
" ": The headlamp, position indicator lamp,
instrument lighting lamp and tail lamp do not come
on.
ELECTRICAL START BUTTON(2)" "
“ ”: Push down the electrical start button to start
the engine.
FRONT BRAKE LEVER(3)
Squeezing the front brake lever will apply the
front brake.
HORN BUTTON(3)" "
Press the button to operate the horn.
CHOKE LEVER(4)" "
When starting a cold engine, use the choke lever.
CLUTCH LEVER(5)
When starting engine or shifting gear, the clutch
lever is used to disconnect the driving of gear
wheel.
RIGHT HANDLEBAR
14
Always use the turn signal when you intend
to change lanes or make a turn. Always be sure
to push turn signal switch to central position after
completing the turn or lane change.
WARNING
Using only the front or rear brake is dangerous
while driving in high speed. Apply the brakes
lightly and with great care.
WARNING
GEARSHIFT LEVER
Gearshift lever(1) is connected with ratchet. After
choosing one gear, the gearshift lever is returned
to its original position for choosing another gear.
The gear shift pattern is international type, i.e. the
first gear down; the second, third and forth gear
up.
Before shifting gear down, reduce the motorcycle
speed, and when shifting gear down before the
connection of clutch, increase the engine speed to
avoid over wear of rear tire and driving elements.
STEERING LOCK
17
When the gearshift is in neutral gear position,
the blue indicator(neutral gear indicator) will light.
CAUTION
"ON"
Normal position while operating the motorcycle.
At this time, the gasoline flows through the fuel lever
to carburetor.
"RES"
If the fuel level in the fuel tank is too low, turn
the lever to the "RESERVE" position to use the
reserved fuel.
"OFF"
After the engine stops for a few minutes, put the
fuel lever to "OFF" position.
KICK STARTER LEVER
The kick starter lever is located on right side of
the engine.
REAR BRAKE PEDAL
Pressing the rear brake pedal will apply the rear
brake. When operating rear brake, the rear brake
indicator light turns on.
16
When the fuel tank supply is in the "RES"
position, refilling the fuel in nearby station. After
refilling fuel, turning the fuel lever to "ON" or
"OFF" position.
NOTE
After starting the engine, check if the kick
starter lever is returned to its normal position.
WARNING
When putting the fuel lever to "ON" or "RES"
position, it is possible to cause carburetor fuel
overflow and fuel flows into the engine. When
starting engine, it is possible to cause serious
mechanical damage with fuel in the engine.
Therefore, after shut off the engine, it is
required to turn the fuel cock into "OFF" position.
WARNING
FUEL AND ENGINE OIL
RECOMMENDATION
FUEL
Use SH0041-93 unleaded type gasoline, this
gasoline should be at least 90 octanes.
By using recommended unleaded type gasoline,
it can prolong the spark plug, exhausting system
parts and motorcycle service life.
ENGINE OIL
The engine oil used in this motorcycle conform
to Chinese national standard GB11121-95 and ANS
SAEJ183E80. Please use a good quality 15W/40
SF/CD GB11121-95 engine oil. Skyteam
motorcycle special engine oil, is recommended to
be used. The ordinary engine oil, vegetable oil, or
castor- based racing oil are not recommended.
Select the recommended engine oil with different
precision class and brand according to the different
areas and temperatures.
The engine oil shown in the following chart may
be used according to the average temperature in
your riding area.
RUNNING-IN
The forward explains how important the proper
running-in is to achieve maximum life and
performance from your new Skyteam motorcycle.
The following guidelines explain proper running-
in procedures.
19
To lock the steering, turn the handlebar all the
way to the right, insert the ignition key in the steering
lock (1) and turn it clockwise. When stopping the
motorcycle, lock the steering lock.
HELMET HOLDER
The use method of helmet holder is: Insert the
ignition key (1) into the seat lock, and turn it
clockwise to unlock, then hang your helmet on the
hook (2) at the seat hinge and lower the seat to
lock. To remove a helmet, unlock the seat. Lift the
helmet off the holder and lower the seat, making
sure it is securely locked before riding.
18
Do not operate the motorcycle with a helmet
attached to the holder; the helmet may interfere
with the safe operation of the motorcycle.
WARNING
Never attempt to move the motorcycle when
the steering lock is locked, or you may lose
WARNING
MAXIMUM SPEED
This table shows the maximum speed in running-
in period.
load) can cause parts to graze and not seat in.
Allow the engine to accelerate freely through the
gears provided that the recommended maximum
limit is not exceeded. Do not, however, use full
throttle for the first 1600km.
ALLOW THE ENGINE OIL TO CIRCULATE
BEFORE RIDING
Allow sufficient idling time after warm or cold
engine start up before applying load or reviving the
engine. This allows time for the lubricating oil to
reach all critical engine components.
PERFORM YOUR FIRST, AND THE MOST
CRITICAL, SERVICE
The first 1,000km service is the most important
one that your motorcycle will receive. During
running-in, all engine components will have worn
in and all the other parts will have seated in. At this
time all adjustment should be made, all fasteners
should be tightened and the dirty oil be replaced.
VARY THE ENGINE SPEED
The engine speed should be varied and not held
at a constant speed. This allows all the parts in the
engine to be loaded and unloaded. The parts will
cool down when they are unloaded. This is
conductible for matching between the engine parts.
During running- in period, it is necessary to apply
a reasonable stress on all the engine parts to
ensure the best matching between them. The stress
or load applied to engine parts should be adequate,
not excessive.
AVOID CONSTANT LOW SPEED
Operating the engine at constant low speed (light
20
Initial 160km
Up to 800km
Up to 1600km
Less than 30km/h
Less than 33km/h
Less than 40km/h
CHECK FOR:
Timely performance of the first 1,000km service
will ensure optimum service life and performance
of the engine.
INSPECTION BEFORE RIDING
Before riding the motorcycle. Be sure to check
the following items. Never underestimate the
importance of these checks and perform all of them
before riding the motorcycle.
(1)Smoothness
(2)No restriction of movement
(3)No play or looseness
(1)Correct pedal and lever play
(2)No dragging
(3)Brake shoes to be within the wear
limit
(1)Correct pressure
(2)Adequate tread depth
(3)No crack or cuts
Enough fuel for the planned distance
Operation of all lights and indicator
lights-headlamp, tail lamp, brake
lamp, instrument lighting lamp, turning
signal lamp
Correct function
Enough amount of oil
(1)Correct play in the throttle cable
(2)Smooth operation and positive
return of the throttle grip to the
closed position
(1)Correct play in clutch
(2)Smooth operation
21
The first 1,000km service should be performed
as outlined in the maintenance schedule section
of this owner's manual. Pay particular attention
to the caution and warning in maintenance
schedule section.
CAUTION
WHAT TO CHECK
STEERING
BRAKES
TYRES
FUEL
LIGHTING
HORN
ENGINE OIL
THROTTLE
DRIVE CHAIN
A
B
STARTING THE ENGINE
Check the fuel lever to make sure that is at "ON"
position, insert the ignition switch and turn it
clockwise to the "ON" position.
When the transmission is in neural, neutral
indicator will light.
WHEN THE ENGINE IS COLD
Turn the choke lever from "A" position to "B"
position, push the electric start button or depress
the kick starter lever to start the engine.
Immediately after the engine starts, let the engine
RIDING TIPS
22
Always start the engine with the transmission
in neutral.
WARNING
(1) If it is the first time that you have ridden a
motorcycle of this type, we suggest that you
practice on a non-public road to become
thoroughly familiar with controls and operation
of the motorcycle.
(2) One-hand riding is extremely dangerous.
Keep both hands firmly on the handlebars and
feet securely on the footrests. Under no
circumstances should both hands be removed
from the handlebars.
(3) Don't brake hard in the midst of cornering.
Slow down to a safe speed before negotiating a
corner.
(4) When the road surface is wet or slippery,
there is a reduction in tire traction. You should
reduce speed when ever these conditions exists
as braking and cornering ability are reduced.
(5) At side winds which may be experienced at
the exits of tunnels, when passing by the cut of
hill, or when being overtaken by larger vehicles,
you should reduce speed and ride alertly.
(6) Obey the speed limit and traffic regulations
at all times.
WARNING
A
B
ST125-6
ST50-6, ST110-6
run until the engine sufficiently warms up, then
return the choke lever to its original position. When
the engine runs smoothly and the choke lever is in
its disengaged position, the engine is warmed up
sufficiently. The more cool is the temperature, the
more time is needed for warming up the engine.
WHEN THE ENGINE IS WARM
Open the throttle by 1/8 to 1/4. push the electric
starter button or depress the kick starter lever. The
operation of the carburetor choke system is usually
not necessary when the engine is warm(the choke
lever should be at "A" position).
STARTING OFF
Automatic clutch
Stamp down the shifting lever, the first gear is
engaged. Twist the throttle lever toward yourself,
at the same time, smoothly and slowly loosen the
clutch lever. Due to engagement of clutch, the
motorcycle moves forward.
For shifting to next higher gear, slowly increase
the speed, then shut off the throttle. Turn shifting
lever to next higher gear and open the throttle, the
highest gear can be engaged by following these
steps.
23
If 2~3 times operation can not start the engine,
open the throttle grip 1/8 to 1/4 turn, then restart
the engine.
A motorcycle not used for long-time or poor
vaporized fuel may cause difficult starting, in this
time, don't turn the throttle grip, but repeatedly
start the engine.
NOTE
Do not run the engine indoor where there is
little or no ventilation available. Carbon monoxide
fumes are extremely poisonous. Never leave the
motorcycle running while unattended, even for
WARNING
Do not let engine run excessively without
riding, or it will overheat and may damage
internal engine components.
CAUTION
Pulling in the clutch lever and letting the linkage
gear in the transmission disconnected, reduce the
motorcycle speed and shift the gear into neutral,
until full brake.
Before stopping the motorcycle, observe the neutral
indicator light to distinguish if it is in neutral gear.
Place the motorcycle on a firm and level ground.
Before starting the engine, remember to shift the
gear into neutral.
Turn the ignition switch to the "OFF" position to
stop the engine.
Remove the ignition key from the switch.
Turn the fuel cock to the "OFF" position.
Lock the steering for security.
CHECKS AND MAINTENANCE
The chart below indicates the intervals between
periodic service in kilometers and months. As the
end of each interval, be sure to check, inspect,
lubricate and service as instructed. If your
motorcycle is used under high stress conditions
such as continuous full throttle operation, or is
operated in a dusty climate, certain services should
be performed more often to ensure reliability of the
motorcycle section.
Steering components, suspension and wheel
components are key items and require very special
and careful servicing. For maximum safety we
suggest that by your authorized Skyteam dealer
or qualified service personnel.
25
The more high speed of vehicle is, the more
long distance of braking needs. Be sure of the
safe distance between front vehicle or object and
yourself.
WARNING
Manual clutch
Keeping the engine running at idle speed, pulling
in the clutch lever and wait a minute, stamp down
the shifting lever with left foot toe to engage the
first gear. Slowly open the throttle and lightly leave
the clutch lever, the gear is engaged and the
motorcycle moves forward.
For shifting to next higher gear, firstly open the
throttle, then shut off the throttle, at same time leave
the clutch, stamp down the shifting lever to 2nd
gear. Then lightly loosen clutch lever to let the gear
engaged, then slowly open the throttle.
DRIVING ON SLOPE
When climbing and feeling that impetus is not
enough, shift gear down to let the engine run in its
power range.
Shifting gear should be performed quickly to avoid
the loss of impetus.
When driving on downhill, shift gear down to
facilitate the brake.
Don't let the engine run too quickly.
BRAKING AND PARKING
Twist the throttle grip away from yourself to close
the throttle completely.
Apply the front and rear brakes evenly and at the
same time.
24
Using only the front or rear brake is dangerous
and can cause skidding and loss of control. Apply
and brakes lightly and with great care on a wet
or slippery surface. Brakes hard on glossy or
rugged and rough road is very dangerous.
WARNING
An inexperienced driver often uses only the
rear brake, this will accelerate the brake system
wear and prolong the brake distance.
NOTE
Before starting off you must put the side stand
back in its position entirely. Don't let it hang.
WARNING
Engine fixing bolts and nuts
Inlet and outlet valve clearances
(cold state)
*
*
Transmitting chain tension
Carburetor
Air cleaner
Lub oil in gear box
Lub oil filter gauze
Spark plug
Throttle grip and cable
Brakes (front, rear)
Tire pressure
Speedometer soft spindle
Front and rear wheel center bearing
Fuel tank cock
Steering
Fuel lines
All parts for fixing
*
*
*
*
* *
Item
Period
Initial
1000km
1600km 3000km 5000km
Afterwards
every
2000-3000km
C
C
C
C
---
R
C
C
C
C
C
C
C
C
C
C
C
C
C
C
CL
---
R
C
C
---
C
---
---
---
---
C
C
C
C
C
A
C
CL
R
C
C
C
C
C
---
---
C
C
C
C
C
A
A
C
---
R
C
C
C
C
C
C
O
C
C
C
C
C
C and A
C and A
C and A
CL
R
C
C
C
C
C
C
C
C
C
C
C
27
PERIODIC MAINTENANCE CHART
26
Proper running-in maintenance (1,000km) is
a mandatory item for making certain that our
motorcycle is reliable and gives full performance
at all times. Be sure that this periodic
maintenance is performed thoroughly and in
accordance with the instructions in this manual.
CAUTION
LUBRICATION
The lubrication is very important for ensuring the
ability to maneuver all movable parts and prolong
the service life of motorcycle. After riding in wet or
rainy condition or at throttle fully opened, lubricating
all parts of motorcycle is required.
The main points to be lubricated are: Drain chain,
brake cable, front brake grip holder, kick starter
lever pivot.
BATTERY AND FUSE
Open the seat cushion and the battery box
cover(1), you can see the battery(2) and fuse
holder(3). Don't attempt to remove the sealing caps
from the cells, it is dangerous and you may damage
the battery. Please use a voltage gauge to check
the battery charging state(specified voltage is
12.8V).
29
KEY: C=Check, CL=Clean, A=Adjustment, R=Replace, O=Oil
NOTES:
(1)This chart is for reference of periodic maintenance, or ideally more checks and maintenance should
be carried out.
(2)Check item in the chart contains check, adjusting, clean, replace and oil.
(3)Ask a professional repairer to do some items in the chart which can't do by yourself.
(4) The inlet and outlet valves should be checked after every 1,500km. The valve clearance in cold state
is 0.05mm.
(5)The wear limit of brake shoe's brake pad is 1.5mm, the brake shoes should be replaced as a set.
(6)Check the swing situation of front and rear wheels often. If wheels swing seriously, find out the reasons
and get rid of them.
28
NOTE
Periodical checks may reveal one or more parts that may need replacement. Whenever replacing
parts on your motorcycle, it is recommended that you use genuine Skyteam replacement parts or their
equivalent. Whenever you are an expert or do it yourself mechanics, Skyteam recommends that those
items on the check chart marked with an asterisk(*), be performed by your authorized Skyteam dealer
or qualified service personnel. You may perform the unmarked items easily by referring to the instructions
Remove the bolt (1), the air clearer cover (2) in
the figure, take the polyurethane filter assembly
(3) out of the air cleaner house.
CLEANING OF AIR CLEANER FILTER
ASSEMBLY
(A)non-flammable cleaning (B)motor oil
Cleaning methods are as follows:
(1)Fill a washing pan of a proper size with non-
flammable cleaning solvent, immerse the filter
assembly in the solvent and wash it clean.
(2)Squeeze the solvent off the washed filter
assembly by pressing it between the palms of both
hands. Do not twist and wring it or it will develop
fissures.
(3)Immerse the filter assembly in a pool of motor
oil and squeeze the oil off it to make it slightly wet
with oil.
(4)Reinstall the element in the contrary order of
removal. Be absolutely sure that the element is
securely in position and is sealing properly.
31
Before and during the cleaning operation,
carefully examine the element for any tears in
the material. A torn element must be replaced
with a new one.
NOTE
The fuse is in the battery box(3), near the battery,
the electrical system is protected by a fuse. If there
is any electrical system failure while riding, then
the fuse must be checked.
There is spare fuse (2) in the fuse (1), open the
fuse holder(3). Replace the blown fuse with a new
one and install it into the fuse box.
AIR CLEANER
If the air cleaner filter assembly has become
clogged up with dust, intake resistance will result
in the reduction of output power and therefore the
increase of fuel consumption. The checks and
cleaning to the filter assembly should be conducted
with the following procedures for every 3000km.
30
If driving under dusty condition, the air cleaner
filter assembly must be cleaned or replaced more
frequently.
NOTE
Always be sure to replace the blown fuse with
the correct ampere fuse. Never use substitute,
for example aluminum foil or wire, to replace a
blown fuse. If the spare fuse installed blows in a
short period or time it means that you could have
a major electrical problem. You should consult
your Skyteam dealer immediately.
NOTE
Make sure about poles when connecting
electric wires onto the terminal on the battery.
Red wires must be connected to positive(+) pole
and black wires to negative(-) pole. Incorrect
connection can lead to damage to the charging
system and the battery.
CAUTION
6000km, change the oil according to the following
instructions.
Changing the lubricant oil in the engine should
be carried out when the engine is warm.
Remove the engine oil filler cap/dipstick (1)then
the drain cock (2) to drain the oil fully. The used oil
drainage should be carried out. Then refit the drain
cock, pour the new lubricant by the oil filler hole.
Check the lubricant level with a dipstick: insert a
dipstick into the gear box, the oil level should be
between the marks (3) and (4) (Do not screw in
the dipstick into the hole).
CARBURETOR
undisturbed carburetion is the basis of the
performance you ought to expect from your engine.
The carburetor is factory set for the best
carburetion. Do not attempt to alter its setting. There
are two adjustments that you should take care are:
Adjust engine idle speed and throttle cable play
periodically.
33
SPARK PLUG
Select the recommended plug: A7TC.
After the first 1000km and afterwards every
3000km riding, remove the carbon deposits from
the spark plug with a small metal wire brush or a
spark plug cleaner. Readjust the electrode gap of
spark plug with a gap thickness gauge to make it
between 0.6 to 0.7mm. The spark plug should be
replaced after every 6000km riding.
TRANSMISSION OIL (SHIFTING GEAR OIL)
After a long time driving, the shifting gear oil in
the transmission may degrade, which could reduce
the lubricating performance of the oil. Therefore,
after first 1000km driving and afterwards every
32
The standard spark plug for this motorcycle
has been carefully selected to meet the most
operation ranges. If the spark plug color differs
from a standard one, you should better consult
your Skyteam dealer before selecting an
alternating plug on a heat range. The selection
of an improper spark plug can lead to severe
engine damage and driving difficult.
CAUTION
Do not over torque the spark plug otherwise
threads of the cylinder head will be damaged.
Do not allow contaminants to enter the engine
through the spark plug hole when the plug is
removed.
CAUTION
Never operate the engine without the element
in position.
Operating the engine without the air cleaner
element will increase engine wear. The life of
the engine depends largely on this single
component.
NOTE
When performing the periodical check, the
following states of drive chain should be checked.
(1)Loose pins
(2)Damaged rolls
(3)Dry and rusty chain links
(4)Excessive damage
(5)Twisted and binding links
(6)Loose drive chain
If the above troubles found, the sprocket is most
probably to be damaged. Therefore the following
check of the sprocket is necessary:
(1)Excessively damaged sprocket teeth.
(2)Broken or damaged sprocket teeth.
(3)Loose lock nuts of the sprocket.
After every 1000km riding, adjust the drive chain
tension to ensure the tension distance between 15-
25mm. under severe usage, or when the
motorcycle is ridden in unusually dusty or muddy
areas, more frequent adjustment will be necessary.
DRIVE CHAIN
It is suggested that the worn chain replacement
be conducted by approved Skyteam dealer.
35
In order to assure the maximum safety, the
drive chain check and adjustment should be
carried out before the riding.
WARNING
The adjustment at every 1000km riding is the
greatest adjustment interval, in fact before every
driving, it is necessary to check the drive chain.
Excessive chain slack should cause the chain
to come off the sprocket and result an accident
or serious engine damage. The transmission
chain adjustment should be conducted as per
following methods:
WARNING
CARBURETOR IDLE SPEED CHECK AND
ADJUSTMENT
THROTTLE CABLE ADJUSTMENT
As the figure shown: there is 0.5-1mm slack at
the throttle cable. Adjust the throttle cable according
to following instruction:
Hold the throttle cable hose to check the slack.
Loosen the lock nut (1) and adjust the cable slack
by turning adjuster (2) in or out to obtain the correct
slack.
After adjusting the slack, tighten the lock nut(1).
(1)Start up the engine and warm it up.
(2)When the engine is warm, turn the adjusting
screw in or out so that the engine may run at its
idle speed shown in “SPECIFICATIONS”.
34
It is suggested that this adjustment be
conducted by approved Skyteam dealer.
You can do it yourself with the above
procedures if a speedometer is available.
NOTE
The engine idle speed adjustment should be
carried out when the engine is in warmed state.
NOTE
DRIVE CHAIN'S CLEANING AND LUBRICATION
FRONT BRAKE
BRAKE FLUID
A Dirty drive chain can cause premature wear
or damage to the drive chain or sprockets. When
the drive chain becomes extremely dirty, it should
be removed and cleaned with detergent prior to
lubrication, then apply the special sprocket oil or
engine oil.
BRAKES
This motorcycle has hydraulic disc front brake and
rear drum brake. Brakes are items of personal
safety and should be properly adjusted. Remember
to check periodically the brake system and these
checks should
be conducted by qualified Skyteam dealer.
37
Fit the chain joint clip to the chain with its open
end toward the reverse direction of the
transmission direction.
CAUTION
Do not use the remained brake fluid from a
unsealed container, never reuse the brake fluid
remained in the last repairing, because the used
brake fluid may absorb the water from the air.
Use DOT 4 brake fluid from a sealed container.
Do not spill out the brake fluid, when the brake
fluid is glued to the paint, plastic and rubber
material, a chemical reaction shall take place,
causing the damage.
CAUTION
Brake fluid may cause irritation. Avoid contact
with skin or eyes. In case of contact, flush
thoroughly with water and call a doctor if your
eyes were exposed
WARNING
(1)Place the motorcycle on the center stand.
(2)Screw off the cotter pin (1), then loosen the
adjuster nut (2).
(3)Adjust the tension of transmission chain by
turning the adjusting nut to the right or the left. At
the same time, the alignment of aligning center
must also be held. For your convenience of
adjustment, reference marks are made on rotating
arms and all chain adjusters. They can be aligned
with each other and referenced from one end to
another. Refit the axle nut and new cotter pin and
lock the locking nut after adjusting the tension of
transmission chain between 15-25mm. Then you
can make the final check.
36
Two sprockets should be checked for wear
while changing with new sprocket, if necessary,
change them with new sprocket.
NOTE
A burned muffler can scald the person. Even
if the engine is shut off, a burned muffler can
also scald the person. The drive chain check and
adjustment should be carried out after the muffler
cooled to avoid the scald.
WARNING
Before riding the motorcycle, be sure to check
daily the following items:
(1) Check the front brake system for leakage of
brake fluid.
(2) Check the oil pressure line for leakage of
fluid or tears.
(3) Check the brake lever and brake pedal for
free play.
(4) Check the front brake lining for wear.
REAR BRAKE
When adjusting the rear brake, locate the pedal
at the most comfort riding position.
When adjusting the travel of brake pedal(1),
adjust the free travel to 20-30mm by screwing in
or out the rear brake adjusting nut(2).
39
The high pressure brake is used by disc brake
system. To ensure the safety, the replacement
interval of oil pressure line and brake fluid should
not be more than that stipulated in
"MAINTENANCE SCHEDULE" of this manual.
CAUTION
When the new brake lining begins to be used,
don't ride your motorcycle immediately after the
replacement. Apply the brake, release it, then
spin the wheel and check that it rotates freely.
Repeat this procedures several times and allow
the brake fluid to circulate normally.
WARNING
lower level mark
B RAKE LINING
The main points for checking the front brake
lining are to see whether the lining wear is out of
the range. Replace the brake lining wear is out of
the range. Replace the brake lining if the lining wear
is beyond the brake wear limit mark.
limit mark
38
If the brake system or brake linings have to
be repaired, we suggest that these repair should
be performed by your authorized Skyteam
dealer. Skyteam dealer knows your motorcycle
best and is dedicated to your complete
satisfaction.
WARNING
Check if it is short of brake fluid, check the
hose and other components for corrosion or
cracks.
CAUTION
Check that the fluid level is above the lower level
mark with the motorcycle in an upright position
Brake fluid must be added to the reservoir when
ever the fluid level begins to reach the lower level
mark . Fill the reservoir up to upper level mark.
harshly. Make sure that the tire pressure is in the
specified range always. The tire pressure should
be adjusted, when the tires are "cold".
Front tire pressure: 250kPa
Rear tire pressure: 250kPa
TIRE TREAD CONDITION
Operating the motorcycle with excessively worn
tires will decrease riding stability and can lead to
loss of control. It is recommended that the front
and rear tires be replaced when the remaining
depth of tire tread becomes 1.6mm or less.
41
lower part of right frame. Adjust the brake light
switch as the following: turning toward "A" can rise
the switch, toward "B" can drop the switch
(adjusting nut(2)), thus when the brake pedal is
pressed touching the brake, the brake light should
be on.
TIRES
Tire inflation pressure and the general tire
condition are extremely important to the proper
performance and safety of the vehicle, check your
tires frequently for both wear and inflation pressure.
TIRE PRESSURE
Improper tyre pressure may not only hastens tire
wear but also seriously affect the stability of the
motorcycle, under inflation may result in the tire
slipping, or coming off of the rim causing tire
deflation that may result in a loss of vehicle control;
over inflated tires make your motorcycle ride more
REAR BRAKE LIGHT SWITCH
The rear brake light switch (1) is located at the
40
(2)Turn ignition switch to ON position, align the
spark plug to engine and start the engine. If the
ignition system works normally, the blue flare
flashed across the spark plug gap; If there is no
flare, it needs to repair and contact the Skyteam
dealer.
ENGINE IMPETUS IS NOT GOOD
(1)Check the fuel supplying system of fuel tank.
(2)Check the ignition timing of ignition of ignition
system.
(3)Check the engine idle speed.
43
Don't let the spark plug to be near spark plug
opening aperture in cylinder head, because the
fuel vapor in the cylinder can ignite causing fire.
WARNING
To reduce an electrical shock possibility, the
metallic part of spark plug housing is better in
contact with the metallic part of frame no painted.
Any person who is cardiac or equipped with
cardiac pacemaker should keep away from this
test.
WARNING
Before performing the troubleshooting, it is
better to contact with Skyteam dealer. If your
motorcycle is still in guarantee period, Skyteam
dealer should help you to perform
troubleshooting, arbitrary troubleshooting may
affect the guarantee contents.
NOTE
CHANGE OF BULB
When replacing a burned bulb, it is required to
use the bulb with the same rated power. If you use
a bulb beyond the rated power, it may cause the
surcharge of electrical system or the bulb damaged.
The detail bulb rated power, refer to "electrical
system" in "specifications" of this manual.
TROUBLESHOOTING
If the engine can't be started, please perform
the following checks to find out the reasons.
(1)Whether there are sufficient fuel in the fuel
tank.
(2)Whether the fuel flows from the fuel cock into
the carburetor.
(3)Cut off the fuel lever from the carburetor, turn
the fuel cock to "OFF" position to see whether the
fuel flows from the fuel pipe.
(4)If it is certain that the fuel has flowed into
carburetor, the fuel line is normal, then check the
ignition system.
(1)Take off spark plug and connect it again to
the entrance spark plug cap.
42
Do not let fuel run off, always keep it in a
vessel. Do not splash gasoline on warm engine
and air exhausting pipe, keep away from or open
flame, never near any fire source or heat source
while performing this test.
WARNING
A standard 3.50-10 4PR tire is used for this
motorcycle's front and rear tires. The use of other
tires outside standard will cause the unstable
riding. Always use the recommended Skyteam
genuine tires.
Tire inflation pressure and the general type
condition are extremely important to the proper
performance and safety of the motorcycle. Check
your tires frequently for both wear and inflation
pressure.
WARNING
Brake
Steering angle
Negative caster
Turning dia.
ELECTRICAL
Ignition type
Generator
Battery
Spark plug
Head light
Turning signal indicator light
Tail/brake light
Instrument indicator light
Horn
Fuse
CAPACITES
Fuel tank
Air cleaner
Lubrication system
TRANSMISSION
Clutch
Transmission type
Gear ratio(crankshaft: output shaft)
First gear
Second gear
Third gear
Fourth gear
CHASSIS
Tire size
Tire pressure
Suspension
Dry
Pressure and splash lubrication
Automatic, centrifugal type
4-gear, pedal
36/11
31/18 (ST50-6/ST110-6)
27/14 (ST125-6)
25/21 (ST50-6/ST110-6)
23/17 (ST125-6)
20/22(ST50-6/ST110-6)
21/20(ST125-6)
Front tire 3.50-10 4PR
Rear tire 3.50-10 4PR
Front tire 250kPa
Rear tire 250kPa
Spring(front, rear)
Disc type (front) Drum type (rear)
42 (right and left)
25.5
4000mm
CDI
Magneto
12V 4Ah
A7TC
12V 35W/35W
12V 10W
12V 21W/5W
12V 3W, 12V 1.7W
12V 1.5A 95dB(A)
10A
2.4L
45
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SPECIFICATIONS(ST50-6,ST110-6,ST125-6)
DIMENSION AND DRY MASS
Overall length
Overall width
Overall height
Wheel base
Ground clearance
Dry mass
Max. laden weight
MAIN PERFORMANCE PARAMETERS
Fuel consumption at economical speed
Rated power
Max. torque
1550mm
620mm
950mm
1075mm
120mm
76kg
100kg
1.5L/100km
1.6kw(7500r/min) (ST50-6)
4.5kw(7500r/min) (ST110-6)
6kw(7500r/min) (ST125-6)
2.75N.m(6000r/min) (ST50-6)
6.5N.m(6000r/min) (ST110-6)
8.3N.m(6000r/min) (ST125-6)
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44
Idle speed
ENGINE
Model
Type
Bore x stroke
Piston displacement
Compression ratio
Starter system
Carburetor
1350r/min (ST50-6)
1400r/min (ST110-6)
1500r/min (ST125-6)
139FMA-2 (ST50-6)
152FMH (ST110-6)
1P52FMI (ST125-6)
Single-cylinder,
four-stroke, forced air-cooled
39mmx41.4mm (ST50-6)
52.4mmx49.5mm (ST110-6)
52.4mmx57mm (ST125-6)
49.0cm3 (ST50-6)
107cm3 (ST110-6)
123cm3 (ST125-6)
8.8:1 (ST50-6)
9.1:1 (ST110-6)
9:1 (ST125-6)
Electric and Kick start
Piston type
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All information, illustrations, photographs and
specifications contained in this manual are based on the
latest product information available at time of publication.
Due to improvements or other changes, there may be some
discrepancies in this manual. Skyteam reserve the right
to make changes at any time without notice.
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