LONCIN LX250GY-3 User manual

Preface
Warning/Caution
Read this book and keep firmly in mind the essentials. We use words such as “Warning”or “Caution” for differentiating
the importance of issues need be paid attention to, please carefully comprehend their exact definition.
Warning — This word indicates the issues involved personal safety of driver, neglect of this issue may lead to injury.
Caution — This word indicates issues need to be paid attention to and related to motorcycle operation and its
maintenance.
—
—
Thanks for purchasing this type of motorcycle!
This user manual introduced the main specification, basic structure, adjustment method and maintenance skill of this
motorcycle. The user manual makes you know well about the basic operation, and how to eliminate common malfunction,
makes motorcycle fully play its performance, decrease malfunction, and prolong its service life.
Future structural changes may occur on this model and may lead to difference between user manual and actual
motorcycles, and following-up improvements subject to change without notice.

Directory
Matters need pay attention to
I Safe driving of motorcycle
II Main technological parameter
III Structure of motorcycle 7
Name of each part
IV Operation 1
Power source switch 1
Fuel switch 1
Engine starting 2
Engine running-in 2
Right switch assy 3
Left switch assy 4
Method of gear-shifting 5
V Matters need pay attention during driving 16
VI Checking, adjustment and maintenance 17
Machine Oil checking 17
Replacement of machine oil 17
Cleaning of Machine Oil Tank 18
Checking of spark plug 18
Checking and replacement of air filter 19
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1
7
Meter indication lamp 10
Adjustment of throttle cable 0
. ............................................2
. .....................................5
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. .................................................................1
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Electrical schematic diagram....................................
Adjustment of carburetor 20
1
Adjustment of clutch 2
Parking rack 2
28
Periodic table for Maintenance 28
VIII
1
IX Introduction of electrical starting 2
X. 33
Checking and adjustment of valves clearance
Specification table of torque for fastening parts
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Adjustment of brake pedal 2
3
Adjustment on driving chain 5
Adjustment of brake switch 5
Checking of battery 26
Replacement of fuse 26
Tyres 27
Air pressure in tyres 27
Replacement of bulbs 27
VII Motorcycle washing 30
Maintenance during parking period 1
Storage and maintenance
Recovery of using 2
Repair and maintenance of Fr.&Rr.Disc brake

1
Matters need pay attention to
Various spare parts on market could be installed on your motorcycle, but for us, direct control for their quality and
compatibility is impossible. Unsuitable spare parts may endanger the driver. Although complete inspection for all spare parts on
market is impossible, your sales distributors help you select spare parts with high quality and then correctly installed.
For your careful purchasing and installation of spare parts, we provide general criteria for reference for deciding which
parts should be installed and to know its installation method.
1 All accessories with extra weight, or the one face to upwind, its installation position should be as low as possible,
close to motorcycle body and its center of gravity. Luggage rack and its accessories should be carefully checked,
confirm its firm installation. Weak installation may lead to deviation of gravity center which produce danger.
2 Check ground clearance and angle of installation accessories, improper installation may harm to safety.
Impediment to mechanical performance of shock absorber, turning and controlling system is not allowed and
should pay a special attention to.
3 In case install accessories on handle bar or front fork, serious imbalance may be led. Extra weight on front
motorcycle may decrease sensitivity of turning, lead to shock on front wheel and unstable driving. Decrease the
weight of accessories installed on handle bar and front fork to minimum level in case it is indeed needed.
4 Windshield plate, back-rest, saddle bag, and suitcase are all upwind accessories, which were easy to produce
unstability, especially under the conditions of cross-wind or interlacing with oversize vehicles. In case the
accessory was poorly installed or with poor design, which may endanger drving. In this case, selection and
installation of accessories need to pay a special attention.
5 Some kinds of accessories may lead to driver deviating from normal position, which limits not only his scope of
activities but also operation ability.
6 Extra electrical equipment may lead to overloading of original electrical system, in worse case may burnout wire
harness or cut off power of running motorcycle which endanger personal safety.
（ ）
（ ）
（ ）
（ ）
（ ）
（ ）
。

I Safe driving of motorcycle.
.
★ .
★ .
★
★
Check motorcycle before starting engine for avoiding damaged parts and preventing accident.
Motorcycle driver mustn't drive before passing the examination and getting driver's license from Traffic Management
Department, lend motorcycle to person without driver's license is not allowed.
For avoiding injury, give your whole attention to drving when operating the motorcycle, in this case, please pay attention to:
Too close to other motor vehicle is not allowed
Competition for road is not allowed
Strictly adhere to local traffic regulations.
Overspeeding produced many accidents, in this case, speed exceeded permission scope is not allowed.
Turn on turning signal lamp when changing lanes for drawing attention from other drivers.
Pay a special attention to driving when at the crossroads, doorway of parking lot, or driveway.
Left hand firmly grasp on left grip, right hand on right one, and feet step on footrests when it is in running.
Luggage rack is mainly for light goods and should be firmly fixed for avoiding moving when it is in running.
Shift neutral gear to 1st gear under high speed is not allowed.
1
2
3
4
5
6
7
8
.
.
.
.
.
.
.
2
1.For ensuring your personal security, wear protection equipment such as safety helmet, face shield, dust spectacles, and
gloves when it is during driving.
The muffler is with high temperature when at driving, in this case, boot or other wear could cover leg should be worn for
avoiding scald.
3 No loosened wear is allowed, or it may grasp starting arm, footrests or wheels and endanger driver.
2.
.
Regulation of Safe Driving
Protective device

3
★Motorcycle Refit
Checks before driving
Carefully check
motorcycle according to
right table before driving
Checking items
Handle bar
Brake
Fuel storage
Gear box
Throttle
Clutch
Tyres
Transmission chain
Illumination and horn
Oil
Contents
Flexible turning, no clearance and looseness
Brake lever and brake pedal should have correct clearance, and brake lamp should light on when it is at braking
Enough for the traveling plan
Check oil level, and supplement if needed
Greaser grip and throttle cable should have suitable clearance with smooth acceleration and sharp turning off
Cables with suitable clearance and no stagnation
Correct air pressure, no crack and wound
Suitable tightness and with proper lubrication oil
Check the performance of illumination system and horn
Check the oil gauge of engine and confirm the correct oil position
Refit motorcycle or replace its original equipments are unable to ensure driving safety and illegal.
User must show respect to regulations from Traffic management department. Our company undertake no
responsibility to refitted motorcycle without authorization.
Caution:
1.Wiring or changes without authorization is not allowed.
2.When fuse is broken, replace by copper wire or fuse with other capacity is not allowed.
3.When parking at night, turn off the fuel switch.
4.Loading weight on luggage rack should be no more than 5 kg.
5.Qualification certificate should avoid moisture and without folding.
Our company undertake no responsibility of motorcycle burnout or other quality problems due to
cases above.
Warning:

4
1
2
No shifting to lower gear or decelerate at turning is allowed, decrease speed to safe level before turning.
Tyres are with low frictional force when driving on wet and smooth road, which may decrease braking and turning
ability of motorcycle, in this case, decelerate in advance.
5 Crosswind usually occurs at the exit of tunnel, keep careful and calm when get through valley or overtaking the
oversize vehicles, and then, decelerate.
6 Show respect to traffic regulation and limit your speed
.
.
.
.
In case this is your initial driving of this model, we suggest you find a road of nonpublic use, until you know well
the control and operation.
Driving with single hand is dangerous, firmly hold the motorcycle by hands, and feet step on footre sts. Under any
conditions, drving without hands is not allowed.
3
4
.
.
Essentials for driving
Warning:

5
II Main technological parameter.
Length
Width
Height
Wheelbase
Curb weight
Carryin g capacity
Ma x.a llowed weight
Load of Fr.Axle
Load of Rr.Axle
Size of front tyre
Siz e of rear tyre
Max.de signed speed
Model
Data
Bore×Stroke
Compression ratio
Max.net power/Rotational speed
Max.torque/Rotational speed
Rotational speed under idling status
Working volume of cylinder
Spark plug
Clearance of spark plug
Gap of air valve
Model
2168mm
800mm
1455mm
1450mm
158kg
3.00 21
120 90 18
110km h
-
/ -
/
150kg(Including driver)
308kg
76kg
82kg
Braking deceleration Follow GB20073
Data
Max.gradeability
66.5 66.2×
≥ °42
9:1
DCPR8E
0.6~0.8mm
12.5kw/7500r/min
17N.m/6500r/min
223ml
Intake valve 0.6mm
Exhaust valve 0.8mm
：
：
(1500±50)r/min

6
Main parameters(Additional)
Fuel consumption
Capacity of lubrication oil
Capacity of gasoline
Speed ratio of gear box
1st gear
2nd gear
3rd gear
4th gear
5th gear
Primary transmission ratio
6th gear
Terminal transmission ratio
Model
Model Data
Fuse
Headlight
Front position light
Front turning signal lamp
Rear turning signal lamp
Battery
License plate light
Ignition mode
Data
15A
12V 2 5W/0.26W 11LED
12V 5W
12V 0.6W 2 LED
12V7Ah
12V 0.6W 2 LED
12V-0.26 LED
CDI electrical ignition
- . ( )
-
-×( )
-×( )
( )
12V 35W 35W
- /
≤
.
.
.
.
.
.
4.5L/100km
1 3L
11 6L
3.083
2.063
1 450
1 130
0 957
0 815
3.620
3.091
Brake light/Rear position lamp

7
III Structure of motorcycle.
(1)
(2)Left ba ck-view mirror
(3)Meter
(4)Power switch
(5)Right back-view mirror
(6)
(8)
(9)Fuel tank lock
(10)
(11)
Cl utch lever
Front brake lever
(7)Left ha nd grip
Left switch assy
Right switch assy
Throttle grip
Name of each part(head)
(1) (2)
(7) (8) (9) (10) (11)
(3) (4) (5) (6)

(6)(7)(9) (8)(11)
(3)(2)
(10)(12)(13)
(1) (4) (5)
8
( )
(2)
(3)
(4)
(5)
(6)
(7)
( )
( )
( )
( )
( )
1 Head light
Back-view mirror
Fuel tank lock
Oil switch
Rear turning signal lamp
Rear wheel
Rear shock ab sorber
8
9 Gearshift pedal
1
11 Front shock absorber
12 Front disc brake
13 Front wheel
Engine type and ID number
0( )Position of product lable
Name of each part(Body 1st)

9
Name of each part(Body 2nd)
( )
( )
( )
( )
( )
1 Muffler assy
2 Rear disc brake
3 Seat assy
4 Rear brake pedal
5 Vehicle Identification Num ber(VIN)
Position(On the right side of Standing tub e)
(3) (4)(1)(2) (5)

10
Form a habit of turning on signal lamp before lane shifting or make turning, and turn off the lamp after finishing
lane-shift or turning.
Meter indication lamp
Warning:
(3)
(4)
(7)(9) (6)(8) (5)
(1)(2)
Ref.No. Name Note
Speedometer
Right turning indicato
High beam indicator
Gear indicator
Neu tral gear indicator
Fuel level alarm lig ht
Odometer
When turning on high beam light, it is on
Displa y gear situatio n
It is on when at neutral gear
Displa y mileage of motorcycle
It flashes when tu rning right
It flashes when tu rning left
(1)
(2)
(3)
(4)
(6)
(7)
(8)
(5)
Display speed by km/h
Low fuel level display
Le ft turning indicator
Flashes when parts failure occurs
(9)
Failure indicator light

11
IV Operation.
Power source switch
Position
ff O
On
Lock
Usage
For parking(All power off)
For starting or driving(power on)
For locking steering stem
Note
Key could be extracted
Key couldn't be extracted
Key could be extracted
When steering lock is locked, pushing motorcycle is
not allowed, or it may lead to imbalance.
Fuel switch
1 Fuel adding.
△ △
Fuel tank capacity please refer to main parameter.When
adding, support by side stand first, and then open the fuel
cap,after adding, on cap and on fuel tank shoud be
alined.
Please add lead-free or low-lead gasoline above 90#
2.oil valve use ( fuel tank switch)
Position
Usage Note
Fuel line is connected Fuel supplying
Fuel line is cut off Fuel cut off
O
( ) 3 Switch lever of fuel valve
(2)
(1)
(3)
Warning:
Caution:
Fuel switch lever usually put on the position “On” may lead to
overloading fuel supplement in carburetor, worse even flow into
engine. In this case, the engine may be seriously damaged.
Caution:
Off On
Lock

1 Put ignition key on position of “ “.
2 Put emergency switch on position of “ ”.
5 Fuel valve is on position of “ ”.
1.Draw up choke lever on carburetor(Turn off choke
lever).
2.Turn 1/8 1/4 round of accelerator.
3.Start by electricity or foot.
4.Slightly turn greaser grip, speed up engine rotation
for heating.
5.Turn down choke lever when engine completely
heated,totally open choke valve.
.
.
.
3 Confirm neutral gear and its indicator is on.
4 Confirm fuel amount.
.
.
★ ：Engine's cold starting
～
No starting allowed before neutral gear confirmed,
or may lead to accident. Idle running is unnecessary
and bad for engine(especially in high speed).
★Caution:
12
Engine starting ★Engine turning off
1. Relax greaser grip, and slow down the engine.
2. Put on neutral position.
3. Lay ignition switch on position OFF
4. Fuel valve Fuel tank switch is on position“O”.（ ）
Engine running-in
No starting allowed in room with poor ventilation or without ventilators. Because the CO gas is a rank poison.
No leaving allowed when engine is under working status.
Warning:
The first 1000km is the running-in period.
In running-in period, please pay attention to these
issues below:
1. No heavy load and steep slope is allowed.
continuous driving more than 50km is not allowed.
3.No faster than 40km/h in the first 500km.is
allowed, the second 500km mileage should be no more
than 55km/h.
2.Pre-heating for 3 5 minutes before each
starting for sufficient lubrication for moving parts.
～

(Electrical and non-electrical starting is with tiny difference)
1. Headlight switch
Headlight switch has 3 positions they are and (White point)
Headlight tail light and meter light is on
Tail, position and meter light is on.
Head, tail, position and meter light is off
Head and tail light won't be on before motorcycle starting.
2. Electrical starting button Only on electrical starting motorcycle
Electrical starting button is under the headlight switch,when emegency switch is on and
engine is on neutral gear, press this button, and the engine will be started
3 Emergency switch
When engine is starting emergency switch usually put on “ ”.Under emergency
situation put the switch on
， “ ” ,
“ ”： ， .
“ ”：
“·”：.
（ ）
,
.
.
，
，
“ ” “·” .
， .
“ ”
“ ” directly cut down power and the engine is off
★ Caution:
Right switch assy
Under continuous starting of engine, each starting could not be more the 5 seconds, because large scale of
discharges may make engine abnormally hot. In case failed starting after several times, check fuel supplying and
starting circuit.
Warning:
13
(3)Emergency switch
(2)Electrical button
(1)Headlight switch
(1) (2) (3)

Left switch assy
1.Dimmer switch Headlight
High beam
Low beam
2 Turning signal switch
Left light is on
Right light is on
3 Horn switch
Press this button, the horn is ring
4 Overtaking switch
Turn it on while overtaking.
，
.
←
→
.
.
Form a habit of turning on signal lamp before lane shifting or make turning, and turn off the lamp after finishing
lane-shift or turning.
Warning:
14
( )4 Overtaking switch
( )1 Dimmer switch
( )3 Horn switch
( )2 Turning switch
(1) (2)(3)
(4)

Method of gear-shifting
Pre-heat engine for ensuring its normal working
1 When engine is in idling speed, please release clutch(tightly hold clutch lever) step on gearshift pedal make speed
transmission enter the low speed The 1st gear
2 Accelerate engine and slowly release clutch lever coordinately for ensuring natural starting.
3.When got balance driving decelerate engine and release draw up gearshift pedal for entering the 2nd gear, and this
method could be applied for other gear's shifting.
.
. ， ，
（ ） ；
， ，
.
15
International 6 gears：
6
5
4
3
2
N
1
Forwarding gear

V Matters need pay attention during driving.
1 Avoid idling rotation, especially in high speed, or the engine may be damaged.
2 Clutch working in semi-separation status may wear out friction plates.
3 In case feel insufficient power during climbing, change to low speed gear.
4 Use front brake only or coasts in neutral is not allowed when during declining or high speed.
5 Turn down accelerator, meanwhile cut off clutch, and then brake.
.
.
.
.
.
1. High speed corresponds long braking distance. Exactly estimate enough distance for ensuring braking.
2. Inexperienced person use rear brake only, which lead to faster wearing of brake system and longer braking distance.
3. Singly use front or rear brake is dangerous, which lead to motorcycle skidding or out of control. On wet, smooth road or
turning place, carefully and slightly use brake system. Sudden braking on smooth or rough road may lead to motorcycle out of
control.
Warning:
16

VI Checking, adjustment and maintenance.
★
★
Check oil before driving. Check oil on flat ground which support by side stand, uprighting
the motorcycle, and oil gauge should be out of pouring orifice, and the level of oil should be within
upper and lower scale line.
Please use appointed senior grade lubricant.
-30
-22
-20
-4
-10
14
0
32
10 20 30 40
50 68 86 104
20W.50
10W.40 10W.50
10W.30
5W.40 15W.50
℃
Oil is important for engine, so, periodic checking is necessary after the first 500km
change to engine special used oil after the first replacement, change each 2000km (Check oil
each 1000km and supplement).
， ，
， ；
Screw off oil drainage bolt and drain off oil when engine is hot.
Wash filtering screen of oil filter well installed after washing and then pour 1.2Ln new
oil start engine and idly rotate for 2 3 minutes.
Confirm the oil level is within upper and lower scale line after engine stopped for
minutes, make sure the motorcycle is uprighting.
Mixed using of types of oil with grades is not allowed for avoiding mechanical failure.
， ，
， ～
１～２
Replacement of machine oil
17
Machine Oil checking
The oil gauge
Lower scale line
Upper scale line

1.Drain off all the oil.
2.Break down each part.
3.Wash each part.
4.Pouring in appointed oil.
1 Open the cap of spark plug and screw off spark plug by its spanner.
2. Wash surroundings of spark plug, in case it is corroded or with too much precipitate, please replace.
3. Adjust the clearance of spark plug to 0.6 0.8mm.
4 Appointed spark plug must be adopted.
～
1 Screw up too tight the spark plug or wrong threaded is not allowed for avoiding damage thread on
cylinder cover. No impurity enter engine through spark plug hole is allowed when breaking down.
2. Spark plug for this model is carefully selected which suits most of the working circumstance, in
case other spark plug with different thermal resistance need be used, dicuss with Loncin distributor first,
because unsuitable spark plug may seriously damage engine.
.
0.6～0. mm8
18
Cleaning of Machine Oil Tank
Caution:
This work should be done by professional staff in appointed service station. Oil gauge indicates oil
level, starting engine is not allowed when oil is insufficient, oil adding surpass upper scale line is
not allowed.
Checking of spark plug
Caution:
Oil drain bolt