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YG48Q-5AMaintenance ManualFuel system

Fuel system

Maintenance notice

Disassembly and assembly of fuel tank

Troubleshooting

Removal and installation of air filter

Removal and installation of fuel tank

Removal and installation of carburetor

Maintenance notice

This section introduces the knowledge related to the fuel system.

CAUTION



Pay special attention to fire prevention while dealing with gasoline!

Take care of the mounting position of such sealing members as the O-ring while removing various parts of the fuel system.

While reassembling, always use new sealing members such as an O-ring.

Technical specifications

Throat opening diameter

Φ18mmequivalent

Idle speed

1500r/min

150 r/min

Throttle handle free stroke

(

～

3)mm

Troubleshooting



Engine ignition is ok, but it does not start

No fuel or insufficient fuel in the fuel tank

Too much fuel enters the cylinder;

Air filter is clogged;

Spark plug fails;

Fuel tube does not flow well;

Fuel quality problem (containing moisture);

Fuel is stored too long;

Fuel pump failure;

Injector failure (clogged)

Содержание YG48Q-5A

Страница 1: ...escribes various constituting parts of the motorcycle respectively Chapter 19 contains the electrical system diagram The standard maintenance procedures maintenance precautions and general maintenance...

Страница 2: ...stem 79 87 9 Crankcase crankshaft and Shift mechanism 88 104 10 Frame and exhaust system 105 109 11 Front wheel front overhang and steering stem 110 121 12 Rear wheel and rear overhang 122 127 13 Gene...

Страница 3: ...ion Bar Tool About Motorcycle Maintenance Maintenance Period Table Technical Data of Main Performance Symbol Descriptions Standard Torque Values Engine Number Position Photo of Complete Vehicle Frame...

Страница 4: ...d components After reassembling check whether all the spare parts are mounted properly by means of turning moving and operating them 4 To disassemble and assemble a motorcycle special service tools SS...

Страница 5: ...the terminals are not too long or are falling off The connector shall be fully inserted in place For a connector with lock confirm whether the lock is completely fixed Make sure the harness is not fal...

Страница 6: ...ire harness shall not be slackened or be forcibly pulled If the wire harness has to contact the edge or sharp corner parts the contacting part shall be protected with hose or adhesive tape In case of...

Страница 7: ...components 17 In case of rust on the terminals carry out connection operation after disposing it with abrasive paper etc 18 Do not forcibly twist or forcefully bend the cable Because a deformed or da...

Страница 8: ...120 70 12 120 70 12 Normally loaded 225kPa Normally loaded 225kPa Single disc type Model 220 Single disc type Model 190 11L 92 Engine Mode Cylinder bore Stroke Cylinder displacement Compression ratio...

Страница 9: ...d back type Sequence I N Electrical system Electric generator Accumulator capacity Power supply system Fusible cutout Spark plug Spark plug gap Ignition coil type Fuel supply mode Ignition mode Igniti...

Страница 10: ...6 8 12 LOCTITE 648 Stator leads pressure plate bolt 2 6 8 12 LOCTITE 648 Spark Plug 1 12 18 25 Pensioner plate fastening bolt 1 6 7 10 Vehicle body Item Quantity Thread diameter mm Torque value N m T...

Страница 11: ...torized gun special power tool for mantling dismantling bolt and nut Pawl socket for mantling dismantling oil filtering element nut and clutch nut A and B bolt socket for mantling dismantling A and B...

Страница 12: ...e the clearance of piston cylinder valve etc Micrometer to measure the dimensions of piston piston pin etc Dial gauge to measure the wheel bouncing cylinder inner diameter etc Cylinder barometer to me...

Страница 13: ...t and bolt fastening I I I I Wheel tire I I I I Steering column bearing I I I I Steering backstay cable Inspect every 5000km driving and replace every 10000km driving Maintenance shall be carried out...

Страница 14: ...general purpose tools Tightening torque of 50 N m Use suggested engine oil Use the mixtures of engine oil and molybdenum disulfide Use thread locker Use sealant Use lithium base grease 1 Measures to...

Страница 15: ...its quality scale must reach Grade SG and its viscosity shall be selected according to the accompanying diagram depending upon region and air temperature changes While replacing lubricating oil fully...

Страница 16: ...ram besides applying dedicated lubricating oil for chain to the driving chain apply lithium base grease to all other positions All lubricating oils not specified for use in this manual shall be ordina...

Страница 17: ...YG48Q 5AMaintenance ManualLubrication system 15 Crankshaft oil through Camshaft oil through Oil pump FILTER OIL Oil outlet Oil injection port...

Страница 18: ...oil of the specified trademark into the crankcase then insert the oil filter plug CAUTION Application of engine oil of poor quality will have an impact on the functional performance and life span of...

Страница 19: ...l filter cover and screw up the bolt to the specified torque Notice Before the crankcase is refilled with fresh engine oil the engine oil filter must be cleaned Oil Pump In case of failure the oil pum...

Страница 20: ...clutch and the primary driving gear from rotating loosen the nut to remove the clutch component 4 Remove the oil pump Steps for oil pump installation The installation procedures are the removal proced...

Страница 21: ...completed CAUTION The clutch retaining nut must be screwed up to the specified tightening torque must be applied to prevent the nut from getting loose Disassembly and assembly of oil pump Disassemble...

Страница 22: ...to the sense organs of human being The way is simple and easy to use it is used wide in motorcycle maintenance Testing examination method This way is a way that test the size of part and change of geo...

Страница 23: ...rcycle according to the contents hereof before using it Technical specifications Throttle bar free stroke 1 3 mm Recommended spark plug A7RTC Spark plug gap 0 6 0 7 mm Valve clearance cold IN 0 05 mm...

Страница 24: ...et is in good condition To mount the spark plug manually screw up the spark plug first and then tighten it with a socket wrench Put on the spark plug cap Lubricating oil Park the motorcycle on a flat...

Страница 25: ...is abnormal should check electronic ignition high voltage coil charging on the generator and trigger coil etc After properly timing pull off the tensioner locking key and coat the mixture of engine o...

Страница 26: ...ging sound Dah Dah it indicates insufficient tension of the chain tensioner replace it with a new one To replace the chain tensioner Unscrew the 2 M6 16 socket cap screw to remove the sealing washer a...

Страница 27: ...on but rock arms will move apparently when flywheel rotate a small angle the flywheel is not in the compressing stroke but exhaust intake stroke In this case continuously turn the flywheelclockwise fo...

Страница 28: ...led by an ECU Since the intake flow at idle speed has been properly adjusted upon delivery do not adjust the idle speed adjusting screw as desired In case the idle speed is unsteady zero or too high f...

Страница 29: ...rotective rubber lagging Coarse adjustment If the fine adjustment is not satisfying separate the throttle control line with throttle valve body and unscrew the retaining nut B to make adjust the free...

Страница 30: ...the handle or completely push down quickly screw the deflating valve bolt with the torque being 7 9 N m 6 Mount the brake cylinder cover with the sealinggasket flattened and replace with new sealing...

Страница 31: ...eds to be changed Please go to the designated special maintenance station And it is better to use the parts from our company Caution Please change the brake shoe in time if it has been touched the wea...

Страница 32: ...le transmission system should adjust it according to the following overhauling content The content is the free stroke of clutch control handle general is 10 20 mm some venial need adjust the adjusting...

Страница 33: ...k the amount of movement of the lower chain Driving chain tension 10 20 mm If the chain is too loose or too tight make adjustment Adjusting methods Unscrew the rear wheel spindle nut and turn the adju...

Страница 34: ...eter if it is less than 12V recharge it with a charge power supply Seriously corroded conductor connectors of the battery shall be replaced Installation of accumulator Installation is in the reverse o...

Страница 35: ...installing the rear brake spring shall be reliably hooked with the pin hole on the rear brake lamp switch After replacement adjustment shall still be carried out to the rear brake lamp switch Replace...

Страница 36: ...clockwise Install new bulb in opposite order as below Taillight bulb LED 12V 0 5 1W Front and rear lamp bulb Loosen the screws remove the lamp lampshade Lightly press bulb rotate in counter clockwise...

Страница 37: ...up to the specified torques Rear suspension Forcibly press the rear end of the seat cushion with the rear suspension and check the rear fork spindle sleeve for abrasion or damage If it is damaged repl...

Страница 38: ...YG48Q 5AMaintenance ManualFuel system 41 4 Fuel system...

Страница 39: ...position of such sealing members as the O ring while removing various parts of the fuel system While reassembling always use new sealing members such as an O ring Technical specifications Throat open...

Страница 40: ...teps The installation procedures are the removal procedures in reverse order While installing note that the wiring of the fuel pump control wire shall be in strict accordance with the wiring diagram A...

Страница 41: ...d throttle body If you need to replace the new parts proceed under the instruction technician Maintenance of Air Cleaner Component description Damage form Trouble symptom ofmotorcycle Repair method Ai...

Страница 42: ...YG48Q 5A Maintenance ManualRemoval and installation of engine 46 5 Removal and installation of engine...

Страница 43: ...ng oil To maintain the heat engine parts including cylinder head cylinder body piston etc it is necessary to remove the coverings fuel tank throttle body air filter assembly etc To remove the engine s...

Страница 44: ...ating oil 2 Remove bracket from left and right 3 Remove Clutch control line 4 Remove engine cycle tube 5 Remove muffler 6 Remove the magnetic motor gear display line and hit the line wire 7 Remove the...

Страница 45: ...Loosen the nut and remove the lower hanging bolt Move the engine slowly from the right Installation of engine The installation of engine is in the reverse order of removal of engine During installatio...

Страница 46: ...YG48Q 5A Maintenance ManualCylinder Head Cylinder and Piston 52 6 Cylinder head cylinder and piston Cylinder head cover Cylinder head Cylinder...

Страница 47: ...ile assembling coat engine oil and molybdenum disulfide lubricant on the protruding surface of the camshaft for preliminary lubrication Be careful not to damage the cylinder wall and piston Technical...

Страница 48: ...nnecting rod small end Internal diameter 13 016mm 13 027mm 13 027mm Clearance with piston pin 0 016mm 0 032mm 0 032mm Piston ring First ring gap clearance 0 015mm 0 05mm 0 05mm Second ring gap clearan...

Страница 49: ...er piston ring worn Black smoke from exhaust 1 Valve guide worn 2 Oil shield leaked or damaged 3 Cylinder piston piston ring worn 4 Piston ring clearance too big 5 Piston ring incorrectly installed 6...

Страница 50: ...rop the location pin into the crankcase To mount the cylinder head cover 1 Turn the crankshaft so that the piston is at the upper dead point of the compression stroke 2 Remember to confirm the locatio...

Страница 51: ...the camshaft sprocket bolt 7 Strip the timing chain from the timing driven sprocket and remove the timing driven sprocket 8 Remove the camshaft Caution Do not drop the timing chain into the crankcase...

Страница 52: ...ve clearance 7 Connect the phase sensor and mount the eyehole cover and upper eyehole cover in turn Caution When the tensioner is not tensioned never turn the crankshaft for fear of interlocking the t...

Страница 53: ...on pin into the crankcase To mount the cylinder head Installation is in the reverse order of removal Precautions for installation 1 Confirm the location pin clean all parts and components and check wh...

Страница 54: ...ting The valve lock clamp must be mounted in place dropout of the valve lock clamp is dangerous No Procedure Quantity Remarks 1 cylinder block 1 2 Cylinder head gasket 1 Coat the mixture of engine oil...

Страница 55: ...Maintenance limit 5 012mm Measure the valve stem diameter Maintenance limit IN 4 970mm EX 4 955mm Measure the width of the valve contacting surface Maintenance limit 1 7mm Measure the free length of t...

Страница 56: ...he piston slide gage seat Cylinder inspection Check the cylinder for abrasion or damage and check the cylinder wall for scratch Check the cylinder wall for deformation and use the edge ruler and clear...

Страница 57: ...haft See Installation of camshaft 6 Mount the cylinder head cover See Installation of cylinder head cover Notice Assemble the piston with the top side with the marker facing exhaust side Do not drop t...

Страница 58: ...reverse the mounting position of the first ring DY marker and second ring D marker No Procedure Quantity Remarks Sequence of disassembling Assembling is in the reverse order of disassembling 1 Crank...

Страница 59: ...Measure the clearance between the piston ring and the piston groove before removing the piston ring Maintenance limit First ring Second ring 0 12mm Oil ring 0 40mm Mount the piston rings into the cyli...

Страница 60: ...YG48Q 5AMaintenance ManualClutch and Right crankcase cover 70 Clutch and Right crankcase cover Clutch Right crankcase cove Engine...

Страница 61: ...s and components with cleaning agent and dry them with compressed air To assemble the clutch loosen the clutch spring and coat engine oil on the clutch disc in case of replacing new clutch the clutch...

Страница 62: ...e pressure 1 Clutch cable galling damaged or dirty 2 Clutch push rod damaged or jammed Hard clutch operation There is burr on clutch housing chute Shift lever can t return 1 Return spring cracked or s...

Страница 63: ...t crankcase cover connecting bolt 5 Take out the right crankcase cover component 6 Take out the right crankcase cover sealing paper gasket To install the right crankcase cover 1 Confirm the location p...

Страница 64: ...irection of the clutch operating lever Mount the clutch operating lever rear brake return spring cotter pin rear brake lamp switch etc 6 Refill engine oil Notice Do not scrape the crankshaft oil seal...

Страница 65: ...ing order Installation is in the reverse order of removal 1 COVER CRANRCASE R 1 2 GASKET COVER CRANKCASE R 1 3 2 4 1 5 1 6 OIL GAGE 1 7 OIL SEAL13 7 24 5 1 8 FORK PLTAE clutch 1 9 PLATE clutch 1 10 OI...

Страница 66: ...remove the nut M18 and butterfly washer 4 Remove the clutch 5 Remove the clutch washer To install the clutch 1 Mount the clutch washer with the sabotage side facing the main shaft right bearing 2 Moun...

Страница 67: ...r 6 Assemble the right crankcase cover by turning the clutch push rod until its rack side faces the crankshaft See Installation of right crankcase cover Warning Thread retaining adhesive LOCTITE243 mu...

Страница 68: ...se order of removal 1 CLUTCH 1 2 DRIVE GEAR PRIMAR 1 3 FIXING PLATE 1 4 CIRCLIP 1 5 COLLAR 1 a SPRING CAM PLATE SIDE COVER 1 b SPRING 1 c PIN KNOCK 1 d BEARING 6000 1 e SCREW M5 12 4 f CAP CLUTCH END...

Страница 69: ...assembling the clutch disc must be coated with lubricating oil in case of replacing new clutch disc it must be soaked in oil for over 24 hours before being assembled Do not further disassemble the clu...

Страница 70: ...the thickness of each clutch disc Maintenance limit 2 8mm 2 Check the clutch plate for distortion and check the planners with a clearance gauge Maintenance limit 0 1mm 3 Measure the thickness of each...

Страница 71: ...NO DESCRIPTION QTY 1 COVER 1 2 DRIVE CHAIN SELF STARTER 1 3 PLATE GUIDE SPROCKET 1 4 TENTIONER PLATE 1 5 SPROCKET DRIVEN SELF STARTER 1 6 PLATE FIXED 1 7 OIL SEAL 30 42 4 5 1 8 OIL SEAL 18 9 30 5 1 9...

Страница 72: ...ts coat the mixture of engine oil and molybdenum disulfide onto the left crank journal as the initial lubrication Do not dent the seal surface and do not damage the stator coil Technical specification...

Страница 73: ...nd left rear cover and separate the magneto lead connector with the main cable 2 Unscrew the oil drain plug to drain the engine lubricating oil inside the engine 3 Remove the double linked gear cover...

Страница 74: ...aining adhesive LOCTITE 648 while assembling the magneto stator connecting bolt In case of O ring aging prolonging or deforming replace it Notice Do not dent the seal surface and do not damage the sta...

Страница 75: ...and seal gasket 3 Use the rotor fastening tool to fasten the rotor and remove the fastening nut M10 and plain washer 4 Use the rotor extractor to extract the rotor 5 Remove the starting motor fastenin...

Страница 76: ...with the tightening torque being 10 14 N m No Procedure Quantity Remarks Removing order Installation is in the reverse order of removal 1 FLYWHEEL 1 2 NUTM10 1 25 1 3 STATOR COMP 1 4 WIRE CLIP 1 5 SCR...

Страница 77: ...irm the semicircular key 2 ssembly starting motor 3 Mount the plain washer and apply thread retaining adhesive LOCTITE648 to the fastening nut M10 use the rotor fastening tool to fasten the rotor and...

Страница 78: ...must be applied to the rotor retaining nut M12 while assembling with the tightening torque being 45N m Check 1 Check the wear of the starting chain and check the wear of the chain wheel of the startin...

Страница 79: ...ankcase crankshaft and Shift mechanism 88 9 Crankcase crankshaft and Shift mechanism CRANKSHAFT CRANKCASE L CRANKSHAF T PIN A KNOCK CAM SHAFT ASSY SHAFT KICK STARTER THE MAIN SHAFT TRANSMISSION COUNTE...

Страница 80: ...hand crankcase clutch gear shifter 2 Cylinder head cover camshaft cylinder head cylinder and piston See Cylinder head cylinder and piston 3 Left front cover rotor assembly electrical starting transmis...

Страница 81: ...or damaged 2 Shift fork shaft bent 3 Gearshift drum badly machined or bearing shifted 4 Driving driven shaft bearings shifted Gear shift trouble 1 Shift fork bent or damaged 2 Shift fork shaft bent 3...

Страница 82: ...ks haft Notice Do not pry the left right hand crankcase body by inserting such tools as screwdrivers into the mould closing face To mount the crankcase 1 Place the right hand crankcase on the assembly...

Страница 83: ...linder head cylinder piston left front cover rotor assembly electrical starting transmission system driving drive sprocket etc Refer to the related sections 6 Mount the assembled engine onto the frame...

Страница 84: ...l 1 R CRANKCASE 1 2 GASKET 1 3 CRANKSHAFT CRANKCASE L 1 4 BOLT A CYLINDER STUD A 2 5 BOLT B CYLINDER STUD B 2 6 PIN A KNOCK92401 10014 2 7 WASHER 1 8 PIN A KNOCK92401 10014 1 9 CLAMP OVER FLOW PIPE 1...

Страница 85: ...Replace oil seal with a new one after being removed Notice Do not dent the sealing surface and assemble the driving shaft bearing with the side with oil seal facing inwards No Procedure Quantity Remar...

Страница 86: ...he needle bearing may damage it in case it is damaged always change a new one Replace washer with new ones after being removed Apply the thread retaining adhesive LOCTITE 648 while assembling the stud...

Страница 87: ...in the reverse order of removal 1 Left hand crankcase 1 2 Crankshaft 1 3 Knock pin 2 4 GASKET 1 Disassembly and assembly of crankshaft and balance shaft Do not further disassemble the crankshaft other...

Страница 88: ...NG 1 h SUPPORT SPRING START 1 i WASHER 17 1 j WASHER 20 2 k SHAFT KICK STARTER 1 l CIRCLIP 20 2 1 27 1 Crankshaft and balance shaft inspection 1 Check whether the crankshaft journals are abnormally wo...

Страница 89: ...ariable transmission system 1 Place the right hand crankcase assembled with crankshaft and balance shaft on the assembly operating table and the driving driven shaft and assemble the them together 2 A...

Страница 90: ...hile assembling No Procedure Quantity Remarks Sequence of disassembling Assembling is in the reverse order of disassembling 1 SPRING 1 2 FIXING PLATE 1 3 BOLT M8 35 1 4 BOLT M6 12 1 i PRESS BOARD SWIC...

Страница 91: ...k is bent and whether the gearshift drum guiding slot is damaged Measure the shift fork claw thickness Maintenance limit 4 86mm Warning Thread retaining adhesive LOCTITE243 must be applied to the roto...

Страница 92: ...YG48Q 5AMaintenance ManualFrame and exhaust system 105 10 Frame and exhaust system...

Страница 93: ...ouble symptom of component Trouble symptom of motorcycle Repair method Frame The frame is deformed or broken The frame is deformed or broken Running off tracking Calibrate or replace frame Main stand...

Страница 94: ...ng bolts in the headlamp bracket Pull off the headlamp patch plug to remove the headlamp Instrument Remove the meter assembly total of 3 connecting bolts And remove the connection cable To mount the c...

Страница 95: ...Replacement of turn lamp bulb Loosen the screws remove the lamp lampshade Lightly press bulb rotate in counter clockwise Install new bulb in opposite order as below Front and rear lamp bulb12V1 5W Ta...

Страница 96: ...ler seal gasket at the engine s exhaust port shall be replaced with a new one While mounting apply sealants at the joining part of the exhaust pipe and the muffler and fasten the bolts of the exhaust...

Страница 97: ...YG48Q 5A Maintenance ManualFront wheel front overhang and steering stem 110 11 Front wheel front suspension device and steering stem...

Страница 98: ...que values Front wheel spindle 50N m 60N m Steering handle set bolt 20 30 N m Front fork vertical pipe cap nut 50 60 N m Upper lower connection plate set bolt 8 12 N m Brake disc fastening nut 20 30N...

Страница 99: ...steel cable The steel cable The clutch is slipping or not fullydisconnected Replace control steel cable Rear brake pedal The free stroke is over small The clutch is not fully disconnected Readjust the...

Страница 100: ...ce front shock cylinder Piston rod Over worn or damaged Over soft at front shock cylinder Replace piston rod Piston ring is over worn ordamaged Over soft at front shock cylinder Replace piston ring Oi...

Страница 101: ...into oil pipe brake lose effect exhaust front brake oil way oil pipe is broken oil leakage from oil pipe brake lose effect replace oil pipe frontbrake oil pipe is clogged oil pipe is clogged brake los...

Страница 102: ...move the Left combination switch Remove the right brake cylinder body Remove the clutch control line and disassemble the connection of the clutch switch leads Remove the right combination switch Loose...

Страница 103: ...n board and then the bolt at direction of the tube up to the torque of 20 30N m 4 Do not mount the throttle cable in the opposite direction of the feeder on the right handle otherwise the handle may r...

Страница 104: ...Place the front wheel spindle on the V holder and measure the deflection of the wheel spindle with a dial gauge if the reading is no less than 0 2mm replace the front wheel spindle Front wheel bearing...

Страница 105: ...he tightening torque being 20 30 N m Check 1 Dismantle oil drain bolt and check bolt whether or not is loose 2 Drain off absorber oil and check quality whether or not is turned 3 Take off dust sleeve...

Страница 106: ...le Refer to the related sections 2 Remove the upper connect plate To mount of steering stem Installation is in the reverse order of removal While installing the steering stem adjust the adjusting nut...

Страница 107: ...ately instead drive it after holding and releasing the front brake handle until the brake strip and the brake disc are well engaged Front brake disc inspection Measure the thickness of the brake disc...

Страница 108: ...YG48Q 5A Maintenance ManualRear wheel and rear suspension device 121 12 Rear wheel and rear suspension device...

Страница 109: ...damper reliably stand the motorcycle from under the engine a jack or other supports Key torque values Real wheel spindle nut 50 60 N m Rear fork shaft nut 50 60 N m Troubleshooting Rear wheel shimmy...

Страница 110: ...cription Damage form Trouble symptom ofcomponent Trouble symptom of motorcycle Repair method Sprocket and cam sprocket Gear is over wor Drive chain has abnormal sound drive chain is easy to fall out R...

Страница 111: ...k is between 20mm and 30mm and that the left and right scale lines of the chain adjuster are consistent and then fasten the rear wheel spindle nut to the required tightening torque of 60 90N m Warning...

Страница 112: ...r axle lock nut and remove the rear fork shaft from the left side 3 Remove the rear damper and rear fork connecting bolt 4 Take out the rear fork backwards To install the rear fork Installation is in...

Страница 113: ...r installation of the damper Notice Before removing the damper the tightening torque of the bolt connecting the frame is 30 40N m and the tightening torque of the bolt connecting the rear fork is 30 4...

Страница 114: ...instead drive it after holding and releasing the front brake handle until the brake strip and the brake disc are well engaged Rear brake disc inspection Measure the thickness of the brake disc with an...

Страница 115: ...here the removal is convenient first following the principle of searching from easy to difficulty Both the parameter detection method and the parts replacement method are acceptable However if the par...

Страница 116: ...ms The main contents include recharging charge storing and discharging YG48Q 5A power supply features large power supply capacity as high as more than 250W It comprises the following parts and compone...

Страница 117: ...low wire whether is short circuit or broken circuit by millimeter 3 Open left cover to check magneto coil whether is burned or loose 4 Dismantle magneto bolt and replace magneto coil 5 Dismantle start...

Страница 118: ...accumulator s terminal voltage is less then 12V The vehicle has been stored for too long and the accumulator has discharged automatically Charging circuit fails in the complete vehicle Accumulator fa...

Страница 119: ...on of shift position switch side stand switch and clutch switch then press down the start button to power on the relay start the engine to drive the idle gear and starter gear thus enabling the engine...

Страница 120: ...whether is charged 5 Check fuse whether is burned 6 Check positive and negative pole of battery whether contact well 7 Check relay whether is damaged 8 Check magneto coil whether contact well 9 Check...

Страница 121: ...ce clutch switch Connect the line or replace the left switch Connect the line or replace the left switch Replace the starting relay Repair or replace main cable Starting motor doesn t rotate there is...

Страница 122: ...es and people to dodge by the flash of the turn lamp while driving at night it shall inform of its presence by the tail lamp s front rear position lamp and illuminate the number on the license plate w...

Страница 123: ...YG48Q 5A Maintenance ManualIllumination signal system 136 Circuit schematic drawing...

Страница 124: ...ther is charged 5 Check fuse whether is burned 6 Take off headlamp switch socket to check whether there is current 6 Dismantle headlamp bolt to check lamp case whether is damaged 7 Mount bulb and hold...

Страница 125: ...lose contact Adjust velum of electrical horn to check it whether is damaged 16 Check neutral socket whether contact well 17 Signal lamp control systems Check flasher whether is burned or plug is loos...

Страница 126: ...YG48Q 5A Maintenance ManualIllumination signal system 139...

Страница 127: ...elated lines of the main cable are open Connect the fuse or replace it Repair or replace the left switch Replace bulb Re plug Repair or replace main cable Brake lamp does not illuminate Corresponding...

Страница 128: ...n theYG48Q 5Adisplays include vehicle speed engine speed fuel indicator Neutral indicator turn indication high beam indication total subtotal mileage traveled and EFI Indicator Constituting parts and...

Страница 129: ...ng to assure safe riding 2 Odometer Indicate riding distance Km 3 Turn indicator R right turn twinkle when turn to right Green L left turn twinkle when turn to left Green 4 Headlight high beam indicat...

Страница 130: ...dlamp holder to check holder whether there is current 4 Dismantle meter bolt to check it whether is loose or damaged 5 Dismantle meter bolt and odometer cable to check bolt whether is damaged or loose...

Страница 131: ...cation failure Line poorly plugged or open circuit Meter failed ECU failed Re plug or repair Replace meter Replace ECU Fuel level indication failure No indication while there is fuel Having indication...

Страница 132: ...handled Through the engine and actuators on the vehicle ignition coil fuel injector Idle speed control valve and so on the fuel and fire are exactly controlled and corrected with closed loop For produ...

Страница 133: ...YG48Q 5A Maintenance ManualEngine management system 146 Major parts and components...

Страница 134: ...YG48Q 5A Maintenance ManualEngine management system 147...

Страница 135: ...2 Turn the ignition off before connect or disconnect the connectors 3 Make sure the temperature of the ECU is below 80 4 The fuel pressure is much high about 250kPa so please do not disassemble the fu...

Страница 136: ...oltage KsDGDM_IAT_ShortLow P0113 IAT Circuit High Voltage or Open KsDGDM_IAT_ShortHigh Coolant Oil Sensor P0117 Coolant Oil Temperature Sensor Circuit Low Voltage KsDGDM_CoolantShortLow P0118 Coolant...

Страница 137: ...the data of intake air temperature equals to the real intake air temperature Yes Setp 5 No Next 3 Remove the connector and use the multimeter to check whether the resistance between pin B and D is rea...

Страница 138: ...tion on Next 2 check whether the data of engine temperature equals to the real temperature Yes Step 5 No Next 3 Remove the connector and use the multimeter to check whether the resistance between pin...

Страница 139: ...0123 Information TPS Circuit High Voltage ITEM OPERATION RESULT NEXT STEP 1 Connect the diagnostic tool and ignition on Next 2 Check whether the data of Throttle opening is between 0 1 Yes Step 5 No N...

Страница 140: ...PR Coil Circuit Low High Voltage or Open ITEM OPERATION RESULT NEXT STEP 1 Connect the diagnostic tool and ignition off next 2 Wait about 30s Remove the fuel pump realy ignition on Check whether volta...

Страница 141: ...rst before issue analysis Diagnostic Help 1 Make sure there is no any issue record of the engine 2 Make sure the issue could repeat 3 Have checked follow the instructions above and no cause found 4 Do...

Страница 142: ...ction is normal Yes Next No Clean or change the injector Pull out the sprk plug check whether it is wet or not Yes dry the plug and combustion chamber No Next Check whether the cylinder pressure is no...

Страница 143: ...rness maintenance Check whether the injeoctor is blocked Yes Clean or change the injector No Next Check the typ and the clearance of the spark plug Yes Next No Change the sprk plug Check whether the c...

Страница 144: ...YG48Q 5A Maintenance ManualElectrical System Diagram 157 19 Electrical System Diagram...

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