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ZS250GY-3 (EFI)MOTOCYCLE
SERVICE MANUAL
The first edition(Dec.2017)
Zongshen industrial group reserves all rights of this
service manual.
The specifications and pictures in this manual are
only for reference.

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Summary of Contents for ZONGSHEN ZS250GY-3

  • Page 1 ZS250GY-3 (EFI)MOTOCYCLE SERVICE MANUAL The first edition(Dec.2017) Zongshen industrial group reserves all rights of this service manual. The specifications and pictures in this manual are only for reference.
  • Page 2 All the specifications,diagram, data and performance index in this manual end in the print of this book. Our companyreserves the right to change the book without any notification.All rights are reserved by Zongshen.Any people or companies won’t copy it if there is no permission.Otherwise,we will go behind the criminal and legal responsiblity.
  • Page 3: Table Of Contents

    CATALOGUE Introduction Catalogue Chapter 1 General Information ....................1 Section 1 Vehicle Introduction ....................1 Section 2 Structure ........................2 Chapter 2 Maintenance Knowledge .................... 4 Section 1 Attention Items Of Maintenance .................. 4 Section 2 General Knowledge Of Maintenance ................4 Section 3 Adjusting Data Of Maintenance ...................
  • Page 5: Chapter 1 General Information

    Chapter 1 General Information Section 1 Vehicle Introduction ZS250GY-3 is designed for use on road With futuramic appearance and easy operation. It adopt single cylinder,4-stroke,water cooling engine. This type of engine has the advantages of good cooling,powerful and good acceleration.The frame is pipe joint which has high tensity and good rigidity.The brake system adopts the combination of front and rear disc so that it could ensure the stabilization and safety.And rim...
  • Page 6: Section 2 Structure

    Section 2 Structure This motorcycle mainly consists of riding system,operation system,brake system,transmission system,fuel supply system,electrical system and engine.Refer to Diagram 1-3. Diagram 1-3 structure [1]Riding system [2]Operation and brake system [3]Transmission system [4]Fuel supply system [5]Electrical system [6]Engine 1 Riding System The basic function of riding system: [1]Make motorcycle in a whole and support whole motorcycle.
  • Page 7 proper pull and speed of motorcycle,so that it can adapt the changable running condition.The gearshift of this motorcycle adopts gradational gearshift. [4]Rear transmission device The function of rear transmission device is to transmit the engine power to transmission device,so that the rev is reduced and the torque is augmented.Then transmit the power to rear wheel to drive motorcycle run.The transmission of this motorcycle is chain transmission.
  • Page 8: Chapter 2 Maintenance Knowledge

    Chapter 2 Maintenance Knowledge Section 1 Attention Items of Maintenance When there are some problems with motorcycle,you can have it repaired at Zongshen after-service station or professional maintenance station.Meanwhile you also can refer to this maintenance manual. Parts on the motorcycle will be worn or loose during riding. Lack of regular maintenance can affect the safety and reliability of your motorcycle and shorten the service life.So a regular maintenance will help to...
  • Page 9 (1)Disassembly of Motorcycle Disassembly is a very important part during repair.The method of disassembly will directly influence the quality and efficiency of repair.If components broken or blocked caused by unproper disassembly,it will not only expand the repair range,but also will delay the repair period.Seriously,it will lead to the disassembly stop.The basic principle of disassembly is the order and direction opposite to those of installation.
  • Page 10 [2] Instrument Inspection Instrument inspection is to measure the size and geometry shape of parts by gauge and apparatus;then compare the measured value with limiting value to figure out the condition of parts.This method can get an accurate judgement,but it needs careful inspection for the precision of instrument and reasonable selection of parts.
  • Page 11 Please refer to the specialized list or the following formula for the bit diameter of bottom hole : Diameter of drilling hole outside diameter of screw thread - 1.1mm×screw pitch(appropriate for iron and copper) Diameter of drilling hole outside diameter of screw thread-1.2mm×screw pitch(appropriate for steel and brass) When cutting inside threads,turn master tap into the chamfer-angle hole,then take out and use plug tap to shape the threads.
  • Page 12: Section 3 Adjusting Data Of Maintenance

    (1)Ignition Time Adjustment If there is a wrong ignition advance angle,it will cause a series of problems,such as hard engine starting ,power decrease,high fuel consumption,engine overheating,uncomplete fuel burning,exhaust value overrun,short service lifetime and so on.Therefore,adjust ingiton advance angle firstly. If ignition system cannot work well,check electrical ignition device,high voltage coil,ignition coil and triggering loop of magneto and so on.
  • Page 13 Table 2-2 Maintenance Cycle Items Mileage km Times Items Period 1000km 4000km 8000km 12000km Fuel system ● Fuel filter ● Control system ● Choke valve cable ● Air cleaner element spark plug gap Valve clearance ●● Driving chain Battery Abrasion of brake pads Brake system Brake light switch ●...
  • Page 14: Chapter 3 Vehicle

    Chapter 3 Vehicle Section 1 Fuel Supply System Fuel supply system consists of fuel tank,fuel pump,injector,fuel filter and oil pipe. 1 The Structure and Working Principle of Fuel System [1] Fuel Tank Fuel tank is jointed by the armor plate which is normally 0.8mm~1.0mm.Some fuel tank is jointed apertured clapboard inside,which not only strengthens the fuel tank,but also avoids the fuel gurgitation during riding.Because of the strong erosion of oil,it must be galvanized on the surface of fuel tank.There is a fuel-adding hole on the top of fuel tank and close the fuel cap which has air hole,so that it can avoid fuel...
  • Page 15 2 Disassembly and Maintenance of Fuel System [1]The capacity of the fuel tank is 16L。 When refueling, please keep air circulation and keep away from sparks and flame. WARNING fuel tank cap Fuel is highly combustible.Smoking and getting close to the fire are strictly forbidden Switch off the motorcycle and operate in an airy place.
  • Page 16 [5]First of all, dismantle the left and right side cover and seat.Then remove fixed bolt and take out the fuel tank. WARNING dismantle the fuel tank Keep the oil away from fire when dumping the oil. [6]Remove the six fixed bolt(M5×16) of fuel pump by hexagon wrench.
  • Page 17 [9]Check the motor of fuel pump for running.And clean or replace the fuel strainer. check the fuel pump ADVICE Replace the fuel filter when the motorcycle drives about 8000~10000Km. 3 The cause,trouble description and repair method of fuel supply system Table 4-1 Maintenance of Fuel Supply System component...
  • Page 18: Section 2 Efi System

    Section 2 EFI system The main effect of EFI system is to convert the fuel which is supplied from fuel tank into a mist, then mixture of the mist and air import into the combustion chamber. 1 The Structure and Working Principle of EFI system EFI system consists of ECU,nozzle,throttle valve,intake air temperature,integrated pressure sensor,engine temperature sensor,ignition coil,CKP,fuel pump,oxygen sensor.
  • Page 19 2 Disassembly and Maintenance of EFI system The EFI of motorcycle has been calibrated before leaving the factory. When EFI system has failure, adjust idle screw of throttle voluntarily and replace or adjust parts of EFI are strictly prohibited.Please go to our service station to maintain for any queries.
  • Page 20 Section 3 Inlet and Exhaust System The inlet system of engine mainly consists of air cleaner and inlet pipe.The main function of which is to guide and filtrate air,reduce inlet noise and control the volume of mixed gas which is going to engine. The exhaust system mainly consists of exhaust pipe and muffler.The main function of which is to transfer the exhaust gas to atmosphere,reduce the noise when exhausting and the temperature of exhaust gas and eliminate the spark in exhaust gas.A good exhaust system can advance the inlet and exhaust...
  • Page 21 3 Disassembly and Maintenance of Intake System [1]Dismantle suspension bolt of air cleaner and clamp screw of inlet pipe.Remove air cleaner assembly. air cleaner [2]Dismantle lock screw of air cleaner element. Take out the element of air cleaner and check whether there is too much dust on it.Clean it if too element much dust.
  • Page 22 4 Disassembly and Maintenance of Exhaust System [1]Dismantle the locknut of exhaust pipe of muffler and suspension bolt of muffler.Check whether the suspension bracket is broken.Re-joint it if broken. Locknut CAUTION When the suspension bracket of muffler is broken,replace or re-joint it. [2]Remove muffler and check whether the muffler muffler is broken or damaged.Re-joint or replace it when...
  • Page 23 [5]Check whether there is carbon deposit at the muffler tail.Clean it. muffler tail 5 The cause,trouble description and repair method of inlet and exhaust system Maintenance of Inlet and Exhaust System Table4-3 component trouble description of description of cause repair method component description motorcycle...
  • Page 24: Section 4 Rear Transmission Device

    Section 4 Rear Transmission Device Because the export torque of engine is small and its rev is fast,it only can enhance the torque of engine to ensure the good working condition of motorcycle by 3-time deceleration.The first time is through the drive and driven gear of cluth.The second time is through the drive and driven bearing of derailleur.The third time is through the drive and driven gear of rear transmission device,so that the export power and rev of engine can economically and properly be used.
  • Page 25 [3]Check the abrasion of small drive chain and replace the chain assembly if necessary. Small drive sprocket wheel [4]Dismantle fixed bolt of chain box,and remove the chain box. chain box [5]Dismantle the spring clamp of drive chain. Remove tie-in of drive chain and drive chain.Check the abrasion of the tie-in of drive chain and replace it if necessary.
  • Page 26 [7]Remove left gasket of rear wheel and check its abrasion.Dismantle the locknut of rear axle, then take rear wheel off. Left gasket [8]Remove the oil seal of cushion body of rear drive sprocket wheel and check its abrasion. Oil seal [9] Remove the rear drive sprocket and check it for wear.
  • Page 27 3 The cause,trouble description and repair method of rear transmission device Table 4-4 Maintenance of Rear Transmission Device Component Trouble description Trouble description Cause Repair method Description of component of motorcycle Drive chain Drive chain has Wholly replace drive and driven Gear teeth are disengages from strange sound and is...
  • Page 28: Section 5 Frame And Accessories

    Section 5 Frame and Accessaries Frame is the supporting framework of motorcycle.It is the main supporting part of motorcycle. Because motorcycle should bear mighty shake during running,its component and structure must have high intensity and the frame is required to be light.In this way,it is good for motorcycle to have a high- speed running.
  • Page 29 [3]Check all the covers of motorcycle.Replace them if damaged. Cover ADVICE Replace the covers if damaged. [4]Check whether the seat is damaged.Replace it if damaged. Seat ADVICE Replace seat if damaged. [5]Check whether the rubber cover of front pedal is damaged.Replace it if damaged.
  • Page 30 3 The cause,trouble description and repair method of frame and accessories Table4-5 Maintenance of Frame and Accessories Component Trouble description of Trouble description of mot Cause Repair method Description component orcycle Frame is struck or Frame is distorted. Motorcycle cannot run Correct or replace has fallen down.
  • Page 31: Section 6 Steering System

    Section 6 Steering System The direction of motorcycle is operated by steering handlebar.The steering handlebar connects with direction pole.It sees the frame as the center and run the front shock absorber and operate the front wheel through the rotation of direction pole. 1 The Structure and Working Principle of Steering System [1]Steering handlebar The right steering handlebar of motorcycle is the throttle control grip,Control oil flow rate.The right...
  • Page 32 Section 7 Operating Steel Wire 1 Structure and Working Principle of Operating Steel Wire Operating steel wire mainly consists of steel wire,wire head and metal spring plastic hose.The steel wire should be soft so that it doesn’t break off easily and it can bear big pressure.It is normally made of several thin wires,which ensure the intensity of steel wire and make it soft.The wire head is connected with steel wire through the method of stannum jointing ,zins alloy die-casting and so on.The outside of metal spring plastic hose is plastic and inside is a spring hose made of steel wire,which can bear any bending and...
  • Page 33: Section 8 Shock Absorber

    Section 8 Shock Absorber Front shock absorber is the spring connecting part between front wheel and vehicle body.Rear shock absorber mainly bear axial pressure of rear wheel.Both of them support the weight of the whole vehicle body.During motorcycle running,it reduces the concussion and shake for motorcycle and rider,reduces the pressure for components,prolongs the service lifetime of motorcycle and enhances the comfort,operation and stability for rider.
  • Page 34 [3]Dismantle bolt of front shock absorber and drain front shock absorber oil.Check whether the oil is bad.Replace it if bad. Drain shock absorber oil [4]Remove the oil seal and spring clamp of front shock absorber and check whether the edge of oil seal is worn.Replace it if necessary.
  • Page 35 [7]Measure the inner diameter of lower pipe of front shock absorber with callipers.Check whether it exceeds the limit value of maintenance.Replace it if exceeds. Measure the lower pipe. [8]Remove the returning spring of front shock absorber and check its abrasion.Replace it if worn. Spring of shock absorber [9]When installing front shock absorber,add front shock absorber oil according to the stated.
  • Page 36 [2]Check whether the left one has the same length as the right one and check whether the spring surface of shock absorber is damaged.Replace it if Rear shock absorber damaged. CAUTION When rubber components have abrasion or aging,replace them. 4 The cause,trouble description and repair method of front/rear shock absorber Maintenance of Front/Rear Shock Absorber Table 4-8 component...
  • Page 37: Section 9 Rear Fork

    Section 9 Rear Fork The rear fork connects rear wheel with frame.It makes rear wheel rotate around a fixed point through rear shock absorber to reduce the strike and shake of rear wheel. 1 The Structure and Working Principle of Rear Fork Because rear fork gets big strike and shake,the requirement on material and jointing is very high.It is made through the method of jointing and so on.It...
  • Page 38: Section 10 Wheel

    Section 10 Wheel Front/rear wheel is the running component of motorcycle.It supports the weight of whole motorcycle and ensures a friction made by wheel and road to make wheel avoid sliding.Wheel can reduce and absorb the strike and shake caused by the road.The front wheel cooperates with operating part,which fixes on the direction of running.The rear wheel is transferred power by engine,which drives motorcycle to run.Wheel mainly consists of outer tire,inner tire,aluminium tire,tire hub,bearing,bush,oil seal and axle.
  • Page 39 [2]If front wheel is deformed by stricking or vibration, so that the bike run out of way or steering control trembling or vibrating. The wheel need to be replaced or adjusted. Check front wheel CAUTION Replace the wheel when it trembling over the maintainence limit value。...
  • Page 40 [6]Put front wheel on rectification desk and rotate it in high speed to check the abrasion condition and free strock. if it is abraded, dismantle it and replace. CAUTION check front wheel shaft When there is noise or free strock turn wide, replace it with new beering.
  • Page 41 [10]Dismantle the locknut of rear axle .Remove rear axle and rear wheel assembly. Check rear axle. [11]Dismantle rear wheel and check whether rear wheel hub is damaged.Replace it if damaged Check rear wheel hub. [12]Check whether rear axle is worn.Replace it if worn.
  • Page 42 3 The cause,trouble description and repair method of wheel Table4-10 Maintenance of Wheel Component Trouble description of Trouble description of motor Cause Repair method Description component cycle Front wheel is Motorcycle runs towards one Replace front Front wheel is distorted. side and turning handlebar wheel.
  • Page 43: Section 11 Brake

    Section 11 Brake Motorcycle usually needs to decelerate and stop during riding,so brake is used to make resistance to wheel to achieve that purpose.For normal motorcycles,front brake is operated by right hand and rear brake is operated by right foot.However,among some motorcycles with automatic clutch,such as moped or scooter,the rear brake can be operated by left hand.The brake of motorcycle consists of drum brake and disc brake.This motorcycle adopts front disc brake and rear drum brake.
  • Page 44 [3] Disassemble disc brake friction plate and check the piston of brake caliper for working condition. If it cannot work well ,repair or replace hydraulic Remove front brake brake. friction plate [4]Disassemble locking nut of front axle and Mileage line, then remove the front wheel. Remove wheel [5]Remove the speed counter and check the wear breaking of the seal blade.
  • Page 45 [7]Measure the thickness of front brake disc with micrometer.The limit value of repair is 2.0mm. Check the thickness CAUTION If the thickness of brake disc exceeds the limit value of repair 2.0mm,replace the brake disc. [8]Measure brake disc run-out with dial indicator, and the limit value of repair is 0.3mm.
  • Page 46 [11]Disassemble the nut of rear wheel axle and remove the wheel axle and rear wheel assembly. locking nut [12]Remove friction lining and Measure the thickness of it with the limit value of repair is 2.0mm. Check the piston of brake caliper. If it cannot run normally, fix or replace hydraulic brake.
  • Page 47 [15]Measure the run-out of brake disc by dial indicator and the limit value is 0.3mm. Measure the run-out CAUTION I f t h e v a l u e o f r u n-o u t e x c e e d t h e l i m i t value,replace it.
  • Page 48 Trouble 3: after several attempts to apply the brake, it feels like braking is soft or gone. Cause study: 1. Poor sealing of brake fluid which leads to leakage of brake fluid; 2. Brake system vacuum filling fails. It fails to fill brake fluid with the 2nd circuit of ABS control module; 3. Brake caliper falls off. Methodology: 1.
  • Page 49: Section 12 Meter

    Section 12 Meter The meter of motorcycle is to indicate the working condition of motorcycle. 1 The Structure and Working Principle of Meter [1]Speedometer Speedometer is to indicate the running speed of motorcycle and the total mileage.It is driven by front wheel. The rev of front wheel is sent to speedometer through gearshift system and soft axle,which makes magnetic cylinder rotate.Coil cuts magnetic wire,which makes whirlpool and magnetic field to cooperate with the magnetic field of magnetic cylinder,makes whirlpool disc get a torque,overcomes a resistance and drives the finger to rotate.
  • Page 50 3 The cause,trouble description and repair method of meter Maintenance of Meter Component Trouble description of Trouble description Cause Repair method Description component of motorcycle The filament of The filament of indicator is Indicator doesn’t Replace bulb of indicator is burned-out. burned-out.
  • Page 51: Chapter 4 Electrical

    Chapter 4 Electrical System Section 1 Basic Knowledge In order to get a further understanding of structure and working principle of motorcycle electrical system,you should have a general conception about basic knowledge of electrics firstly. 1 Electricity,electric current,voltage and resistance The basic component of any substance is atom.There exists electropositive atomic nucleus and electronegative electron inside the atom.The quantity of nucleus is the same as electron,so which makes the positive electricity counteract the negative electricity and causes atom to be neutral.If the substance is...
  • Page 52: Section 2 Power Supply

    Electrical system is an important part of motorcycle.Its structure and function directly influence the performance and riding comfort of motorcycle.The electric system is divided into three parts:power supply,control and power consumption.Because the ignition system of electrical system is the core of motorcycle,it is described in the engine part.During the common usage,you should maintain the electrical system frequently.The common trouble of electrical system of motorcycle can be looked up through the circuit diagram,so the circuit diagram is attached both in user’s manual and maintenance manual.
  • Page 53 [1]Remove fuse tube and check whether it melts down.Replace it with the same type. Fuse tube type:12V/20A Check fuse tube. CAUTION When fuse tube is damaged,replace it with the same type. [2]Remove storage battery and measure whether its voltage is above 12V.When it’s lower than 12V,remove and charge it.
  • Page 54 [5]Check whether the magnetic cylinder of generator rotor fades magnet.Replace magnetic cylinder if fades. Check magnetic cylinder. 3 The cause,trouble description and repair method of power supply part Maintenance of Power Supply Part Component Trouble description Cause Trouble description of motorcycle Repair method Description of component...
  • Page 55: Section 3 Control Part

    Section 3 Control Part 1 Composing and Function of Control Part In electrical system of motorcycle,control part is to ensure the good working condition of power supply part and power consumption part,and ensure their harmony.It can make rider control the electrical system momentarily.
  • Page 56 [2]Remove the flasher socket of signal system and measure the flasher with multimeter.Check whether it has short circuit.Replace it if short circuit. Flasher [3]Check whether starting relay is in good working condition.Replace it with the same type if it is not in good working condition.
  • Page 57 [6]Check whether the main cable is damaged. Bundle the leads in time if the insulative rubberized fabric is damaged. 3 The cause,trouble description and method repair of control part Maintenance of Control Part Component Trouble description Trouble description of mot Cause Repair method Description...
  • Page 58: Section 4 Power Consumption Part

    Section 4 Power Consumption Part The power consumption part of electrical system of motorcycle consists of following:: (1)Light-signalling Device Illuminating signal device consists of headlight,position light,taillight and meter indicator.Its main function is when motorcycle runs at night,they illuminate and have motorcycle noticed by other vehicles in order to ensure the riding safety.
  • Page 59 [4]Check whether the taillight is burned-out. Replace it with the same type if burned-out. Taillight [3]Check whether the turning light is burned-out. Replace it with the same type if burned-out. Turning light [4]Check whether the bulb of meter indicator is burned-out.Replace it if burned-out.
  • Page 60 3 The cause,trouble description and repair method of power consumption part Maintenance of Power Consumption Part Component Trouble description of Trouble description of mot Cause Repair method Description component orcycle The adjustment The beam of light of Adjust the of beam of light is headlight is too far or beam of light of headlight...
  • Page 61 Chapter 5 Analysis of Motorcycle Troubles Section 1 Analysis of Engine Trouble 1.1 Analysis of Poor Idle Speed of Engine poor idle speed of engine The idle speed of No idle speed The idle speed of of engine engine is unstable. engine is too high.
  • Page 62 1.2 Analysis of Insufficient Engine Power Engine power is insufficient. Support motorcycle with main stand,make it off the ground and rotate wheel with hands. Wheel r ota tes W h e e l r o t a t e s freely.
  • Page 63 1.3 Analysis of Engine Start Engine cannot be started or is hard to be started. Check ignition system. Remove spark plug piston and check whether there is carbon deposit between the electrode of spark plug. Check whether there is spark spurt Clean out carbon deposit.
  • Page 64 Analysis of engine overheating Supply the same type of liquid. Check whether the pump is damaged. spark plug dielectric is white. When accelerating,engine has intermission.The engine power is insufficient. The ratio of Combustible mixed gas is normal. ①Check whether air filter is blocked. ①Check whether fuel filter ②Check whether oxygen sensor is is blocked.
  • Page 65 1.5 Analysis of over consumption of engine fuel E n g i n e f u e l e x c e e d s consumptive standard. C h e c k w h e t h e r t h e operation is correct.
  • Page 66 1.6 Analysis of exhaust muffler of 4-stroke engine The exhaust muffler of 4-stroke engine emits blue and white thick smoke. Check whether the oil level of crankcase exceeds the upper mark. The oil in crankcase is too much.The Start engine.When it runs with high redundant oil should be discharged and speed,remove oil ruler and check whether the let the oil level not exceed the upper...
  • Page 67 1.8 Analysis of derailleur gearshift d e r a i l l e u r gear shift Check whether the positioning spring breaks off or its elasticity is insufficient. Disassemble crankcase and check Replace it. whether its mesh of gear is correct according to the standard.
  • Page 68 Section 2 Analysis of electrical part 2.1 Analysis of battery Battery cannot be charged. Remove the connecting part between the generator lead and vehicle cable.Measure the resistance with ohmic meter and check whether the resistance between export lead of charging coil accords with the standard value.
  • Page 69 2.3 Analysis of starting motor S t a r t i n g m o t o r doesn’t run. Turn on ignition switch and press the horn button or turn on/off turning light switch. Eletric horn cannot make sound Electric horn makes rotund sound.Turning light or make poor sound.Turning light illuminates brightly.
  • Page 70 2.5 Analysis of illuminating light All illuminating light don’t illuminate. AC power supply illuminating system Remove the connecting component between the lead bundle of generator and vehicle cable. Check whether there is power export from the export lead of illuminating coil with a bulb. The bulb doesn’t The bulb illuminates.
  • Page 71 Analysis of illuminating light bulb The bulb of illuminating light is easy to burn out. Replace rectifier Short circuit or tanct Normal is not good. R e c t i f i e r h a s trouble Analysis of illuminating light Illuminating lamplight is weak AC supply illuminating system Replace rectifier...
  • Page 72: Electric Horn

    2.8 fault diagnostic program of direction indicator lamp Turning light doesn’t illuminate. All turning light of one side All turning light don Some turning lights of one side don’t illuminate. illuminate. don’t illuminate. Remove the cover of turning Press horn button and Remove the cover of turning light light and check whether of check electric horn.
  • Page 73 2.9 Analysis of electric horn E l e c t r i c h o r n c a n n o t make sound. Turn on ignition switch,turn on/off turning light switch and check the turning light. Turning light cannot illuminate or T u r n i n g l i g h t c a n illuminate dimly.
  • Page 74 2.10 Analysis of brake light Brake light doesn illuminate. Dismantle the cover of brake light and check whether its bulb is burned-out. With a lead,make short circuit between Replace the bulb of two connection end of brake light brake light. switch or two lead end.
  • Page 75: Appendix: Circuit Diagram

    APPENDIX: CIRCUIT DIAGRAM...
  • Page 76 Copyright reserved by Zongshen group Format160mm×230mm The 1st edition Dec.2017 The 1st print Dec.2017...

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