SYM VS150, VS2 User Manual
VS150 / VS2
SERVICE MANUAL
1.
FORWARD
This service manual contains the technical data of each component inspection and
repair for the VS150 / VS2 motorcycle. The manual is shown with illustrations and
focused on “Service Procedures”, “Operation Key Points”, and “Inspection
Adjustment” so that provides technician with service guidelines.
If the style and construction of the motorcycle, VS150 / VS2, are different from that
of the photos, pictures shown in this manual, the actual vehicle shall prevail.
Specifications are subject to change without notice.
Service Department
VMEP COMPANY
2.
CONTENTS
Page Content Index
3-1 ~ 3-18
4-1 ~ 4-13
5-1 ~5-8
6-1 ~ 6-12
7-1 ~ 7-8
8-1 ~ 8-14
9-1 ~ 9-8
10-1 ~10-14
11-1 ~11-10
12-1 ~ 12-8
GENERAL INFORMATION
SERVICE MAINTENANCE INFORMATION
LUBRICATION SYSTEM
FUEL SYSTEM
ENGINE REMOVAL
CYLINDER HEAD/VALVE
CYLINDER/PISTON
“V” TYPE BELT DRIVING SYSTEM/KICK-STARTER
FINAL DRIVING MECHANISM
ALTERNATOR
3
4
5
6
7
8
9
10
11
12
13-1 ~ 13-9
14-1 ~ 14-16
15-1 ~ 15-14
16-1 ~ 16-11
17-1 ~ 17-6
18-1 ~ 18-18
19-1 ~ 19-2
CRANKSHAFT/ CRANKCASE
BODY COVER
BRAKE SYSTEM
STEERING/FRONT WHEEL/SUSPENSION
REAR WHEEL/SUSPENSION
ELECTRICAL EQUIPMENT
ELECTRICAL DIAGRAM
13
14
15
16
17
18
19
MECHANISM ILLUSTRATIONS
VS150/VS2
ٛ
Light switch
ٛ
Start switch
Front winker
Key set
Head light
Handle lever
Fuel cap ass’y
Fuel tank
Battery cover ass’y
Luggage box
ٛ
Dimmer switch
Open switch
ٛ
Winker switch
ٛ
Horn switch
ٛ
ٛ
Tail light
Stop light
ٛ
Air cleaner
Kick starter
HOW TO USE THIS MANUAL
This service manual describes basic information of different system parts and
system inspection & service VS150 / VS2 motorcycles. In addition, please refer to
the manual contents in detailed for the model you serviced in inspection and
adjustment.
The first chapter covers general information and trouble diagnosis.
The second chapter covers service maintenance information and special tools
manual.
The third to the 11th chapters cover engine and driving systems.
The 12th to the 17th chapter is contained the parts set of assembly frame body
and body cover.
The 18th chapter is electrical equipment.
The 19th chapter is wiring diagram.
Please see index of content for quick having the special parts and system
information.
3. GENERAL INFORMATION
Symbols and Marks............................... 3-1
General safety........................................3-2
Service Precautions..............................3-3
Specifications........................................3-9
Specifications.....................................3-10
Torque Values ....................................3-11
Troubles Diagnosis............................3-13
Parts to Be Greased...........................3-17
Symbols and Marks
Symbols and marks are used in this manual to indicate what and where the special service are needed, in
case supplemental information is procedures needed for these symbols and marks, explanations will be
added to the text instead of using the symbols or marks.
Warning
Caution
Engine oil
Grease SHARK 4T is recommended.
Means that serious injury or even death may result if procedures are not
followed.
Means that equipment damages may result if procedures are not followed.
Limits to use SHARK 4T (SAE 20W-50 API SG) class oil. Warranty will
not cover the damage that caused by not apply with the limited engine oil.
(Recommended oil: SHARK 4T oil)
3
SHARK gear oil serials are recommended. (SUPER HYPOID GEAR OIL #
Gear oil
Locking sealant
Oil seal
Renew
Brake fluid
Special tools
Correct
Wrong
Indication Indication of components.
Directions
150)
Apply sealant, medium strength sealant should be used unless otherwise
specified.
Apply with lubricant.。
Replace with a new part before installation.
Use recommended brake fluid DOT3 or WELLRUN brake fluid.
Special tools
Meaning correct installation.
Meaning wrong installation.
Indicates position and operation directions
Components assembly directions each other.
Indicates where the bolt installation direction, --- means that bolt cross
through the component (invisibility).
3-1
3. GENERAL INFORMATION
General safety
Carbon monoxide
If you must run your engine, ensure the place is
well ventilated. Never run your engine in a closed
area. Run your engine in an open area, if you
have to run your engine in a closed area, be sure
to use an extractor.
Caution
Exhaust contains toxic gas which may cause one
to lose consciousness and even result in death.
Gasoline
Gasoline is a low ignition point and explosive
material. Work in a well-ventilated place, no flame
or spark should be allowed in the work place or
where gasoline is being stored.
Caution
Gasoline is highly flammable, and may explode
under some conditions, keep it away from
children.
Used engine oil
Caution
Prolonged contact with used engine oil (or
transmission oil) may cause skin cancer although
it might not be verified.
We recommend that you wash your hands with
soap and water right after contacting. Keep the
used oil beyond reach of children.
Hot components
Caution
Components of the engine and exhaust system
can become extremely hot after engine running.
They remain very hot even after the engine has
been stopped for some time. When performing
service work on these parts, wear insulated
gloves and wait until cooling off.
Battery
Caution
‧ Battery emits explosive gases; flame is strictly
prohibited. Keep the place well ventilated
when charging the battery.
‧ Battery contains sulfuric acid (electrolyte)
which can cause serious burns so be careful
do not be spray on your eyes or skin. If you
get battery acid on your skin, flush it off
immediately with water. If you get battery acid
in your eyes, flush it off immediately with
water and then go to hospital to see an
ophthalmologist.
‧ If you swallow it by mistake, drink a lot of
water or milk, and take some laxative such as
castor oil or vegetable oil and then go to see a
doctor.
‧ Keep electrolyte beyond reach of children.
Brake shoe
Do not use an air hose or a dry brush to clean
components of the brake system, use a vacuum
cleaner or the equivalent to avoid dust flying.
Caution
Inhaling brake shoe or pad ash may cause
disorders and cancer of the breathing system
Brake fluid
Caution
Spilling brake fluid on painted, plastic, or rubber
parts may cause damage to the parts. Place a
clean towel on the above-mentioned parts for
protection when servicing the brake system.
Keep the brake fluid beyond reach of children.
3-2
Service Precautions
y Always use with VMEP genuine parts and
recommended oils. Using non-designed parts
for VMEP motorcycle may damage the
motorcycle.
y Special tools are designed for remove and
install of components without damaging the
parts being worked on. Using wrong tools may
result in parts damaged.
y When servicing this motorcycle, use only metric
tools. Metric bolts, nuts, and screws are not
interchangeable with the English system, using
wrong tools and fasteners may damage this
vehicle.
3. GENERAL INFORMATION
y Never bend or twist a control cable to prevent
unsmooth control and premature worn out.
y Rubber parts may become deteriorated when
old, and prone to be damaged by solvent and oil.
Check these parts before installation to make
sure that they are in good condition, replace if
necessary.
y When loosening a component which has
different sized fasteners, operate with a
diagonal pattern and work from inside out.
Loosen the small fasteners first. If the bigger
ones are loosen first, small fasteners may
receive too much stress.
y Store complex components such as
transmission parts in the proper assemble order
and tie them together with a wire for ease of
installation later.
y Clean the outside of the parts or the cover
before removing it from the motorcycle.
Otherwise, dirt and deposit accumulated on the
part's surface may fall into the engine, chassis,
or brake system to cause a damage.
y Wash and clean parts with high ignition point
solvent, and blow dry with compressed air. Pay
special attention to O-rings or oil seals because
most cleaning agents have an adverse effect on
them.
y Note the reassemble position of the important
components before disassembling them to
ensure they will be reassembled in correct
dimensions (depth, distance or position).
y Components not to be reused should be
replaced when disassembled including gaskets
metal seal rings, O-rings, oil seals, snap rings,
and split pins.
3-3
3. GENERAL INFORMATION
y The length of bolts and screws for assemblies,
cover plates or boxes is different from one
another, be sure they are correctly installed. In
case of confusion, Insert the bolt into the hole to
compare its length with other bolts, if its length
out side the hole is the same with other bolts, it
is a correct bolt. Bolts for the same assembly
should have the same length.
y Tighten assemblies with different dimension
fasteners as follows: Tighten all the fasteners
with fingers, then tighten the big ones with
special tool first diagonally from inside toward
outside, important components should be
tightened 2 to 3 times with appropriate
increments to avoid warp unless otherwise
indicated. Bolts and fasteners should be kept
clean and dry. Do not apply oil to the threads.
y Remove residues of the old gasket or sealant
before reinstallation, grind with a grindstone if
the contact surface has any damage.
y The ends of rubber hoses (for fuel, vacuum, or
coolant) should be pushed as far as they can go
to their connections so that there is enough
room below the enlarged ends for tightening the
clamps.
Groove
Clamp
Connector
y Rubber and plastic boots should be properly
reinstalled to the original correct positions as
designed.
y When oil seal is installed, fill the groove with
grease, install the oil seal with the name of the
manufacturer facing outside, check the shaft on
which the oil seal is to be installed for
smoothness and for burrs that may damage the
oil seal.
Manufacturer's name
3-4
Boots
y The tool should be pressed against two (inner
and outer) bearing races when removing a ball
bearing. Damage may result if the tool is
pressed against only one race (either inner race
or outer race). In this case, the bearing should
be replaced. To avoid damaging the bearing,
use equal force on both races.
Both of these examples can result in
bearing damage.
3. GENERAL INFORMATION
y Lubricate the rotation face with specified
lubricant on the lubrication points before
assembling.
y Check if positions and operation for installed
parts is in correct and properly.
y Make sure service safety each other when
conducting by two persons.
y After service completed, make sure all
connection points is secured.
Battery positive (+) cable should be connected
firstly.
y And the two posts of battery have to be greased
after connected the cables.
y Make sure that the battery post caps are
located in properly after the battery posts had
been serviced.
y Note that do not let parts fall down.
y Before battery removal operation, it has to
remove the battery negative (-) cable firstly.
Notre tools like open-end wrench do not contact
with body to prevent from circuit short and
create spark.
y If fuse burned, it has to find out the cause and
solved it. And then replace with specified
capacity fuse.
Capacity
verification
3-5
3. GENERAL INFORMATION
y When separating a connector, it locker has to
be unlocked firstly. Then, conduct the service
operation.
y Do not pull the wires as removing a connector
or wires. Hold the connector body.
y Make sure if the connector pins are bent,
extruded or loosen.
y Insert the terminal completely.
Check if the terminal is covered by the boot.
Do not let boot open facing up.
y Secure wires and wire harnesses to the frame
with respective wire bands at the designated
locations. Tighten the bands so that only the
insulated surfaces contact the wires or wire
harnesses.
y Wire band and wire harness have to be
clamped secured properly.
y Insert the connector completely.
If there are two lockers on two connector sides,
make sure the lockers are locked in properly.
Check if any wire loose.
y Check if the connector is covered by the twin
connector boot completely and secured
properly.
y Before terminal connection, check if the boot is
crack or the terminal is loose.
y Do not squeeze wires against the weld or its
clamp.
3-6
3. GENERAL INFORMATION
y Do not let the wire harness contact with rotating,
moving or vibrating components as routing the
harness.
y Keep wire harnesses far away from the hot
parts.
Never Touch
y Protect wires or wire harnesses with electrical
tape or tube if they contact a sharp edge or
corner. Thoroughly clean the surface where
tape is to be applied.
y Secure the rubber boot firmly as applying it on
wire harness.
y Route wire harnesses to avoid sharp edges or
corners and also avoid the projected ends of
bolts and screws.
y Route harnesses so that they neither pull too
tight nor have excessive slack.
y Never use wires or harnesses which insulation
has been broken. Wrap electrical tape around
the damaged parts or replace them.
y Never clamp or squeeze the wire harness as
installing other components.
Never clamp or
squeeze the wire
harness
Never too tight
3-7
3. GENERAL INFORMATION
y Do not let the wire harness been twisted as
installation.
y Wire harnesses routed along the handlebar
should not be pulled too tight or have excessive
slack, be rubbed against or interfere with
adjacent or surrounding parts in all steering
positions.
y With sand paper to clean rust on connector
pins/terminals if found. And then conduct
connection operation later.
Clean rust
y Before operating a test instrument, operator
should read the operation manual of the
instrument. And then, conduct test in
accordance with the instruction.
Do you know how to set the
instrument to its
measurement position and
the insert locations of its
two probes?
3-8
Specifications
MAKER VMEP MODEL HA15A6-4 (VS2)
3. GENERAL INFORMATION
Overall Length 1910 mm Front Telescopic Fork
Overall Width 740 mm
Overall Height 1125 mm Front 110 / 80 – 12 61L
Dimension
Weight
Wheel Base 1345 mm
Front 58 kg Front Disk (ψ273 mm)
Curb Weight
Passengers/Weight Two /110 kg Max. Speed Above 100 km/h
Total Weight
Type 4-Stroke Engine Clutch Centrifugal, dry type
Installation and
arrangement
Fuel Used Unlead gasoline Speedometer 0 ~ 140 km/h
Rear 75 kg
Total 133 kg
Front 88 kg
Rear 155 kg
Total 243 kg
Vertical, below center,
incline 80°
Suspension
System
Tire Specifications
Brake System
Performance
Climb Ability Below 28°
Reduction
Secondary
Reduction
Reduction
Transmission C.V.T
Rear Twin Unit Swing
Rear 130 / 70 – 12 64L
Rear Drum (ψ130 mm)
Primary
Belt, 2.56 ~ 0.8
Gear
Cycle/Cooling 4-stroke/water cooled Horn 93~112 dB/A
Bore 57.4 mm Muffler Expansion & Pulse Type
Stroke 57.8 mm
Cylinder
Number/Arrange
Engine
Displacement 149.6 cm
Compression Ratio 11.2 : 1 CO Below 5.5 g/ km
Max. Torque 12.16 Nm / 6500 r.p.m E.E.C. ─
Ignition system C.D.I. electronic ignition P.C.V. ─
Starting System
ment
Max. HP 9 Kw / 8000 r.p.m
Single Cylinder Lubrication System
Kick and electrical
starter
Exhaust Pipe Position and
Direction
3
Exhaust
Catalytic reaction control
Solid Particulate
on
Concentrati
system
HC Below 1.2 g/ km
Right side, and
Backward
Forced circulation &
splashing
Yes
3-9
3. GENERAL INFORMATION
Specifications
MAKER VMEP MODEL VS3
Overall Length 1910 mm Front Telescopic Fork
Overall Width 740 mm
Overall Height 1125 mm Front 110 / 80 -12 61L
Dimension
Weight
Wheel Base 1345 mm
Front 58 kg Front Disk (ψ273 mm)
Curb Weight
Passengers/ Weight
Total Weight
Type 4-Stroke Engine Clutch Centrifugal, dry type
Installation and
arrangement
Fuel Used Unlead gasoline Speedometer 0 ~ 140 km/h
Rear 75 kg
Total 133 kg
Front 88 kg
Rear 155 kg
Total 243 kg
Vertical, below center,
incline 80°
Two/110 kg Max. Speed Above 100 km/h
Suspension System
Tire Specifications
Brake System
Performance
Reduction
Climb Ability Below 28°
Primary
Reduction
Secondary
Reduction
Transmission C.V.T.
Rear Twin Unit Swing
Rear 130 / 70 -12 64L
Rear
Drum (ψ130 mm)
Belt
Gear
Cycle/Cooling 4-Stroke/Water Cooled Horn 93~112 dB/A
Bore 52.4 mm Muffler
Stroke 57.8 mm
Cylinder
Engine
Compression Ratio 11.2 : 1 CO Below 5.5 g/km
Number /
Arrangement
Displacement 124.6 cm
Max. HP 11.1PS / 8000 rpm
Max. Torque 10.12Nm / 6500 rpm E.E.C. ─
Ignition C.D.I. P.C.V. ─
Starting System Power & Foot
Single Cylinder Lubrication System
3
Exhaust Pipe Position and
Direction
Solid Particulate
Exhaust
Catalytic Reaction Control
ation
Concentr
System
HC Below 1.2 g/km
Expansion & Pulse
Type
Right side, and
Backward
Forced circulation &
splashing
Yes
3-10
3. GENERAL INFORMATION
Torque Values
The torque values listed in above table are for more important tighten torque values. Please see standard
values for not listed in the table.
Standard Torque Values for Reference
Type
5 mm bolt、nut
6 mm bolt、nut
8 mm bolt、nut
10 mm bolt、nut
12 mm bolt、nut
Tighten Torque
0.45~0.6kgf-m 5 mm screw 0.35~0.5kgf-m
0.8~1.2kgf-m
1.8~2.5kgf-m
3.0~4.0kgf-m
5.0~6.0kgf-m
6 mm screw、SH nut
6 mm bolt、nut
8 mm bolt、nut
10 mm bolt、nut
Type
Tighten Torque
0.7~ 1.1kgf-m
1.0 ~1.4kgf-m
2.4 ~3.0kgf-m
3.5~4.5kgf-m
Engine Torque Values
Item Q’ty Thread Dia. (mm) Torque Value(kgf-m) Remarks
Cylinder head nut 4 8 2.0~2.4
Cylinder head right bolt 2 8 2.0~2.4
Cylinder head stud bolt (inlet pipe) 2 6 0.7~1.1
Cylinder head stud bolt (EX. pipe) 2 7 0.5~1.0
Tappet adjustment hole cap bolt 6 6 1.0~1.4
Tappet adjustment screw nut 4 5 0.7~1.1 Apply oil to thread
Spark plug 1 10 1.0~1.2
Carburetor insulator bolt 2 6 0.7~1.1
Cylinder stud bolt 4 8 0.7~1.1
Engine left cover bolt 7 6 1.1~1.5
Engine oil draining bolt 1 12 1.1~1.5
Engine oil strainer cap 1 30 1.3~1.7
Mission draining bolt 1 8 0.8~1.2
Mission filling bolt 1 10 0.8~1.2
Clutch driving plate nut 1 28 5.0~6.0
Clutch outer nut 1 12 5.0~6.0
Drive face nut 1 12 5.0~6.0
Flywheel nut 1 12 5.0~6.0
Crankcase bolts 7 6 0.8~1.2
Mission case bolt 7 8 2.0~2.4
3-11
3. GENERAL INFORMATION
Frame Torque Values
Item Q’ty Thread Dia. (mm) Torque Value(kgf-m) Remarks
Stopper nut for engine hanger
rubber
Engine hanger nut 2 12 4.0~5.0
Engine hanger bolt 1 12 4.0~5.0
Engine connection bolt 1 10 3.5~4.5
Front wheel axle nut 1 12 5.0~7.0
Rear wheel shaft nut 1 14 10.0~12.0
Rear fork 2 8 4.0~5.0
Rear cushion upper bolt 2 10 3.5~4.5
Rear cushion under bolt 2 8 2.4~3.0
Nut for steering post 1 10 4.0~5.0
Front cushion 4 8 2.4~3.0
Brake lever nut 2 6 0.8~1.2
Nut for the rear brake arm 1 6 0.5~0.6
Front brake hose bolt 4 10 3.0~4.0
Front brake caliper bolt 4 6 3.0~3.5
Front brake disk mounting bolt 7 8 4.0~4.5
Air-bleed valve 1 5 0.5~0.6
Speedometer cable locking screw 1 5 0.15~0.3
Exhaust muffler bolt 3 8 3.2~3.8
Exhaust muffler connection nut 2 7 1.0~1.2
1 8 1.8~2.2
3-12
3. GENERAL INFORMATION
Troubles Diagnosis
A. Engine hard to start or can not be started
Check and adjustment Fault condition Probable causes
Loosen carburetor drain bolt to
check if there is gasoline inside
the carburetor
Fuel supplied tom
carburetor sufficient
Remove spark plug, install it
into spark plug cap, and perform
a spark test against engine
ground.
Check if sparks Weak sparks, no spark at
Perform cylinder compression
pressure test.
No fuel is supplied to
carburetor
all
1. No fuel in fuel tank
2. Check if the pipes, fuel tank to carburetor
and intake vacuum, are clogged.
3. Float valve clogged
4. Lines in fuel tank evaporation system
clogged
5. Malfunction of fuel pump
6. Loosen or damaged fuel pump vacuum
hose
7. Fuel filter clogged
1. Malfunction of spark plug
2. Spark plug foul
3. Malfunction of CDI set
4. Malfunction of AC generator
5. Ignition coil is in open or short circuit
6. Ignition coil leads open or short circuit
7. Malfunction of main switch
Cylinder compression
pressure normal
Re-start by following the starting
procedures
No ignition There are some signs of
Remove the spark plug again
and check it.
Dry spark plug Wet spark plug
Remove carburetor after 30
minutes and connect a hose
onto fuel rich circuit. Then blow
the hose with air
Low compression
pressure or no pressure
ignition, nut engine can
not be started
1. Piston ring seized
2. Malfunction of cylinder valves
3. Worn cylinder and piston ring
4. Cylinder gasket leak
5. Sand hole in compression parts
1. Malfunction of throttle valve operation
2. Air sucked into intake manifold
3. Incorrect ignition timing
1. Fuel level in carburetor too high
2. Malfunction of throttle valve operation
3. Throttle valve opening too wide
Blowing in normal Blowing clogged
1. Malfunction of automatic by- starter
3-13
3. GENERAL INFORMATION
B. Engine run sluggish (Speed does not pick up, lack of power)
Check and adjustment Fault condition Probable causes
Try gradual acceleration and
check engine speed
Engine speed can be
increased.
Check ignition timing (Using
ignition lamp)
Ignition timing correct Incorrect ignition timing
Check cylinder compression
pressure (using compression
pressure gauge)
Compression pressure
correct
Check if carburetor jet is
clogged
Engine speed can not be
increased.
No compression pressure
1. Air cleaner clogged
2. Poor fuel supply
3. Lines in fuel tank evaporation system
clogged
4. Exhaust pipe clogged
5. Fuel nozzle clogged in carburetor.
6. Fuel nozzle clogged in carburetor.
1. Malfunction of CDI
2. Malfunction of AC alternator
1.
Cylinder & piston ring worn out
2. Cylinder gasket leaked
3. Sand hole in compression parts
4. Valve deterioration
5. Seized piston ring
No clogged Clogged
Remove spark plug
No foul or discoloration Fouled and discoloration
Check if engine over heat
Normal Engine overheat
Continually drive in acceleration
or high speed
No knock Knock
Remove foreign
1.
Remove dirt
1.
2. Incorrect spark plug heat range
1.
Piston and cylinder worn out
2. Lean mixture
3.
Poor fuel quality
4. Too much carbon deposited in
combustion chamber
5. Ignition timing too advanced
6. Poor circuit on the cooling system
1. Too much carbon deposited in
combustion chamber
2. Lean mixture
3. Poor fuel quality
4. Ignition timing too advanced
3-14
r
r
3. GENERAL INFORMATION
C. Engine runs sluggish (especially in low speed and idling)
Check and adjustment Fault condition Probable causes
Check ignition timing (using
ignition lamp)
Normal
Abnormal
Adjust the air screw of
carburetor
Good Poo
Air sucked through carburetor
gasket
No air sucked Air sucked
Remove spark plug, install
spark plug into spark plug cap
and perform spark test against
engine ground
Good spark Poo
D. Engine runs sluggish (High speed)
Check and adjustment Fault condition
1. Incorrect ignition timing
(malfunction of CDI or AC
alternator)
1. Rich mixture (loosen the screw)
2. Lean mixture (tighten the screw)
1. Poor heat insulation gasket
2. Carburetor lock loose
3. Poor intake gasket
4. Poor carburetor O-ring
5. Vacuum hose crack
1. Spark plug fouled
2. Malfunction of CDI
3. Malfunction of AC generator
4. Malfunction of ignition coil
5. Open or short circuit in spark plug
leads
6. Malfunction of main switch
Probable causes
Check ignition timing
Normal Abnormal
Check for fuel supplying system
in automatic fuel cup
Good Abnormal
Check if carburetor clogged
No clogged Clogged
1. Malfunction of CDI
2. Malfunction of AC alternator
1. Insufficient fuel in fuel tank
2. Fuel filter clogged
3. Restricted fuel tank vent
1. Cleaning
3-15
3. GENERAL INFORMATION
E. Clutch, driving and driving pulley
FAULT CONDITIONS
PROBABLE CAUSES
Engine can be started but
motorcycle can not be moved.
1. Drive belt worn out or deformation
Ramp plate of movable drive face damaged
2.
Driving pulley spring broken
3.
Clutch weights broken
4.
Drive slide-shaft gear groove broken
5.
Transmission gear damaged
6.
Engine running and misfire as
motorcycle initial forward moving or
jumping suddenly (rear wheel
rotating as engine in running)
1.
Clutch weights spring broken
2. Clutch outer stuck with clutch weights
Connection parts in clutch and shaft worn out or burned
3.
Poor initial driving ( Poor climbing
performance)
1. Drive belt worn out or deformation
Weight roller worn out
2.
Movable drive face shaft worn out
3.
Driven pulley spring deformation
4.
Driven pulley shaft worn out
5.
Greased in drive belt and driven face.
6.
3-16
Parts to Be Greased
Steering shaft bearing
Acceleration cable/ Front &
rear brake lever pivot
3. GENERAL INFORMATION
Seat catch
Speedometer gear/
front wheel bearing
Side stand pivot
Rear wheel bearing
Main stand pivot
3-17
3. GENERAL INFORMATION
Notes:
3-18
4. MAINTENANCE INFORMATION
Precautions in Operation······················ 4-1
Periodical Maintenance Schedule········ 4-2
Fuel Lines / Cable··································4-3
Air Cleaner··············································4-4
Spark Plug··············································4-4
Valve Clearance ····································· 4-5
Carburetor Idle Speed Adjustment······· 4-6
Ignition System······································ 4-7
Cylinder Compression Pressure ·········· 4-7
Drive Belt················································4-8
Brake System (Front Disk Brake)········· 4-8
Precautions in Operation
Specification
Fuel Tank Capacity 6000 c.c.
Capacity 1000 c.c.
Engine Oil
Change 900 c.c.
Brake Light Switch/Starting Inhibitor
Switch ················································· 4-10
Headlight Beam Distance··················4-10
Clutch Disc Wear································ 4-10
Side Stand··········································· 4-11
Cushion···············································4-11
Nuts, Bolts Tightness ························ 4-11
Wheel/Tire···········································4-12
Steering Handle Top Bearing············ 4-12
4
Transmission Gear oil
Clearance of throttle valve 2~6 mm
Spark plug
“F” Mark in idling speed BTDC 13º / 1700 rpm
Full timing advanced BTDC 28º / 4000 rpm
Idling speed 1600±100 rpm
Cylinder compression pressure 12.0 ±0.2 kgf/cm²
Valve clearance: IN/EX 0.12 ± 0.02 mm
Tire dimension
Tire pressure (cold)
Battery 12V8Ah (MF battery) type: TTZ10S
Capacity 150 c.c.
Change 120 c.c.
Type NGK CR8E
Gap
Front 110/80-12 61L
Rear 130/70-12 64L
Single Front: 1.75 kg/cm² rear : 2.25 kg/cm²
Two persons Front: 1.75 kg/cm² rear : 2.50 kg/cm²
0.6~0.7 mm
4-1
4. MAINTENANCE INFORMATION
Periodical Maintenance Schedule
Maintenance
Code
1
2
3
4
5
6 Tire pressure
7 Battery inspection
8 Brake & free ply check
9 Steering handle check
10 Cushion operation check
11 Every screw tightening check
12 Gear oil check for leaking
13
14
15 Frame lubrication
16 Exhaust pipe
17
18
19
20
21
22
23
24 Main/side stands & springs
25 Fuel lines
26 Cushions
27 Cam chain
28
29
30
31
Code: I ~ Inspection, cleaning, and adjustment R ~ Replacement C ~ Cleaning (replaced if necessary) L ~ Lubrication
Have your motorcycle checked, adjusted, and recorded maintenance data periodically by your SYM Authorized Dealer to maintain
the motorcycle at the optimum condition
The above maintenance schedule is established by taking the monthly 1000 kilometers as a reference which ever comes first.
Remarks: 1. There marks “☆” in the schedule are emission control items. According to EPA regulations, these items must be
☆Air cleaner
☆2nd air jet leaner
☆Fuel filter
☆Oil filter
☆Engine oil change
☆Spark plug check or change
☆Gear oil change
☆Ignition timing
☆emission check in Idling
☆Throttle operation
☆Engine bolt tightening
☆CVT driving device(belt)
☆CVT driving device(roller)
Lights/electrical
equipment/multi-meters
☆Valve clearance
☆Crankcase evaporative control
system
☆Crankcase blow-by over-flow
☆2nd air jet system
performed normally periodical maintenance following the use r manual instructions. They are prohibited to be adjusted or
repaired by unauthorized people. Otherwise, SYM is no responsible for the charge.
2. Clean or replace the air cleaner element more often when the motorcycle is operated on dusty roads or in the
Heavily- polluted environment.
3. Maintenance should be performed more often if the motorcycle is frequently operated in high speed and after the
motorcycle has accumulated a higher mileage.
4. Preventive maintenance
a. Ignition system－Perform maintenance and check when continuous abnormal ignition, misfire, after-burn, overheating occur.
b. Carbon deposit removal－Remove carbon deposits in cylinder head, piston heads, exhaust system when power is obvious
lower. Than ever
Item
Every
300KM
1 Month
every
1,000KM
I C R
I C R
I I R
C C
R Replacement for every 1000 km
I I
I I
I I
I I
I I
I I
I I
I I R
R Replacement for every 5000 km
L
I I
I I
A I
I I
I I
I R
C
I I
I I
I I
I
I I
I A
I C
Replacement for every 2000 km
I I C
3 month
every
3,000KM
6 month
every
6000KM
1 year
every
12,000KM
15 month
every
14,500KM
4-2
4. MAINTENANCE INFORMATION
Fuel Lines / Cable
Remove luggage box.
Remove rear carrier.
Remove body covers.
Check all lines, and replace it when they are
deterioration, damage or leaking.
Warning
Gasoline is a low ignition material so any kind of
fire is strictly prohibited as dealing it.
Acceleration Operation
Have a wide open of throttle valve as handle in
any position and release it to let back original (full
closed) position.
Check handle if its operation is smooth.
Check acceleration cable and replace it if
deteriorated, twisted or damaged.
Lubricate the cable if operation is not smooth
Measure the throttle grip free play in its flange
part.
Adjustment can be done in either end.
Secondary adjustment is conducted from top side.
Remove rubber boot, loosen fixing nut, and then
adjust it by turning the adjustment nut.
Primary adjustment is conducted from bottom
side.
Loosen fixing nut, and adjust by turning the
adjustment nut.
Tighten the fixing nut, and check acceleration
operation condition.
Free play: 2~6 mm.
Fuel filter
Fuel hose
Fuel tank
Adjustment nut
Vacuum hose
Return Fuel hose
Throttle grip
Adjustment nut
Lock nut
2~6 mm
4-3
4. MAINTENANCE INFORMATION
Air Cleaner
Air Cleaner Element
Remove 6 screws from the air cleaner cover and
then remove the cover.
Remove 6 screws, and then remove the air
cleaner element.
Caution
The air cleaner element is made of paper so do
not soap it into water or wash it with water.
Spark Plug
Remove central cover.
Remove spark plug cap.
Clean dirt around the spark plug hole.
Remove spark plug.
Measure the spark plug gap.
Spark plug gap：0.6÷0.7 mm
Carefully bend ground electrode of the plug to
adjust the gap if necessary.
Hold spark plug washer and install the spark plug
by screwing it.
Tighten torque: 1.0~1.2kgf-m
Connect spark plug cap.
Recommended spark plug: NGR CR8E
6 screws
6 screws
0.6÷0.7 mm
Spark plug cap
4-4
4. MAINTENANCE INFORMATION
Valve Clearance
Caution
Checks and adjustment must be performed when
the engine temperature is below 35℃.
Remove trunk.
Remove central cover.
Remove valve adjustment cap.
Remove cylinder head side cover.
Turn camshaft bolt in C.W. direction and let the “T”
mark on the camshaft sprocket align with cylinder
head mark so that piston is placed at TDC position
in compression stroke.
Caution
Do not turn the bolt in C.C.W. direction to prevent
from camshaft bolt looseness.
Valve clearance inspection and adjustment.
Check & adjust valve clearance with feeler gauge.
Valve clearance (IN/EX): 0.12 ± 0.02 mm
Loosen fixing nut and turn the adjustment nut for
adjustment.
Timing mark
Caution
Re-check the valve clearance after tightened the
fixing nut.
4-5
4. MAINTENANCE INFORMATION
Carburetor Idle Speed Adjustment
Caution
y Inspection & adjustment for idle speed have to
be performed after all parts in engine that
needed adjustment have been adjusted.
y Idle speed check and adjustment have to be
done after engine is being warm up. (It is
enough that operates engine from stop to
running for 10 minutes.)
Park the motorcycle with main stand and warm up
engine.
Connect tachometer (the wire clamp of tachometer
is connected to the high tension cable).
Open carburetor cover from the luggage box.
Turn the throttle valve stopper screw to specified
idle speed.
Specified idle speed: 1600 ± 100 rpm
Ignition cable
Emission adjustment in idle speed
Warm up the engine for around 10 minutes and
then conduct this adjustment.
1. Connect the tachometer onto engine.
2. Adjust the idle speed adjustment screw and let
engine runs in 1600±100 rpm.
3. Insert the exhaust sampling pipe of exhaust
analyzer into the front section of exhaust pipe.
Adjust the air adjustment screw so that
emission value in idle speed is within standard.
4. Slightly accelerate the throttle valve and
release it immediately. Repeat this for 2~3
times.
5. Read engine RPM and value on the exhaust
analyzer. Repeat step 2 to step 4 procedures
until measured value within standard.
Emission standard CO: below 2.5~3.5%
HC: below 2000ppm
Stopper screw
Air adjustment screw
4-6
4. MAINTENANCE INFORMATION
Ignition System
Caution
y C.D.I ignition system is set by manufacturer so
it can not be adjusted.
y Ignition timing check procedure is for checking
whether CDI function is in normal or not.
Remove right side cover.
Remove ignition timing hole cap located in front
upper side of engine right cover.
Connect tachometer and ignition lamp.
Start engine.
As engine in idle speed: 1600 rpm, aim at the
mark “F” with the ignition lamp. Then, it is means
that ignition timing is correct.
Increase engine speed to 6000 rpm to check
ignition advance degree. If indent is located within
the ignition advance degrees, it is means that the
ignition advance degree is in normal.
If ignition timing is incorrect, check CDI set, pulse
rotor and pulse generator. Replace it if
malfunction of these parts is found.
Cylinder Compression Pressure
Warm up engine.
Turn off the engine.
Remove the trunk.
Remove the central cover.
Remove spark plug cap and spark plug.
Install compression gauge.
Full open the throttle valve, and rotate the engine
by means of starter motor.
Caution
Rotate the engine until the reading in the gauge
no more increasing.
Usually, the highest pressure reading will be
obtained in 4~7 seconds.
Compression pressure: 12 ± 0.2 Kg/cm²
Check following items if the pressure is too low:
y Incorrect valve clearance.
y Valve leaking.
y Cylinder head leaking, piston, piston ring and
cylinder worn out.
If the pressure is too high, it means carbon
deposits in combustion chamber or piston head.
4-7
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