VESPA LX 50 Spezifikationen

MANUALE STAZIONE DI SERVIZIO665229 (IT), 665230 (EN), 665231 (FR), 665232 (DE),665233 (ES), 665234 (PT), 665235 (NL), 665236 (EL)Vespa LX 50 4valvole

CHECKING REMOTE CONTROLS «A» OPER-ATING AS CIRCUIT BREAKERS1) Check that, given regular conditions, there is nocontinuity between terminals 30 and 87.

Removing the cylinder - piston assy.- Remove the cylinder paying attention to the 2cylinder centring dowels in the housing.- Remove the cylinder base

Inspecting the wrist pin- Measure the outer diameter of the gudgeon pin.CharacteristicStandard diameter: gudgeon pin13 -0-0.004mmMinimum admissible di

Inspecting the cylinder- Using a bore meter, measure the inner cylinderdiameter at three different points according to thedirections shown in the figu

SEAL RINGSName Description Dimensions Initials Quantity1st Compression ring 39 x 1 A 0.08 ÷ 0.202nd Compression ring 39 x 1 A 0.05 ÷ 0.20Oil scraper r

- With the opening in the position indicated on thetool, set the lock ring into position in the tool withthe punch.- Rest the tool on the piston payin

Refitting the cylinder- Insert the cylinder base gasket.- Fit the cylinder as shown in the figure.- The piston can be kept out of the housing planeusi

Measure the camshaft bearing seats and rockinglever support pins with a bore meterHEAD CHECKSpecification Desc./QuantityStandard diameter (mm) A Ø 32.

Inspecting the valve sealings- Clean the valve seats of any carbon residues.- Using the Prussian blue, check the width of theimpression on the valve s

- Measure the diameter of the valve stems in thethree positions indicated in the diagram.STANDARD DIAMETERSpecification Desc./QuantityInlet 3.970 ÷ 3.

Inspecting the valve stem guide clearanceMeasure the valve guidesVALVE GUIDE DIAMETERSpecification Desc./QuantityValve guide Standard diameter: 4 + 0.

STARTER BUTTONHORN BUTTONSTOP BUTTONResistance between green cable and ground con-nection: approx. 170 OhmVespa LX 50 4valvole CharacteristicsCHAR - 1

Refitting the valves- Lubricate the valve guides with graphite grease.- Place the lower caps of the valve spring on thehead.- Use the punch to fit the

- If any of the above dimensions are outside thespecified limits, or there are signs of excessivewear, replace the defective components with newones.N

- Insert the head in the cylinder stud bolts and tighten the 4 fixing nuts to the prescribed torque.Specific tooling020450Y Camshaft fitting/removal t

Refitting the timing chain- Insert the timing chain pads in their correspond-ing seatings, the screw and the spacer as indica-ted in the figure.- Tigh

Camshaft pulley screw 12 ÷ 14 Head coverscrew 8 ÷ 10 Nm- Set the tensioner cursor in the rest position.- Fit the chain tensioner on the cylinder, usin

FIT THE CARBURETTOR THROUGH THE SUPPLEMENTON THE MANIFOLD.Locking torques (N*m)Inlet manifold screw 7 ÷ 9 NmCrankcase - crankshaft- First remove the f

- Check the axial clearance on the connecting rod.Fitting clearanceStandard connecting rod axial clearance 0.15 ÷0.30 mm Max. connecting rod clearance

Refitting the crankshaft bearings- Support the crankcase on a surface and place itwith the driving shaft axle in a vertical position.- Warm the crankc

Inspecting the crankshaft alignment- Install the crankshaft on the support and measurethe displacement at the 4 points shown in the fig-ure.N.B.IF VAL

- Fit the gasket recommended for surfaces on thehalf casing on the transmission side after greasingthe two faying surfaces carefully.-Insert the flywh

- Primary resistance: 0.5 ÷ 0.6 Ohm- Resistance between primary and ground con-nection: infinite- Resistance between primary and HV output: 3 ÷3.6 kOh

- Check that the chain contrast pad is not worn.-Otherwise, replace the pad or fit it inverted tomake it work on the other side.- Any operation on the

Removal- Remove the chain compartment cover undoingthe 3 fixing screws indicated in the figure.- Take out the cover using the appropriate fusioncoupli

- Measure distance between rotors (inner rotor/outer rotor) with a thickness gauge in the positionshown in the picture.CharacteristicAdmissible maximu

- Fit the pulley on the pump, the central screw tothe specified torque and the belleville washer.- Check that there is no seizing and/or friction dur-

Fuel supply- Disconnect the fuel supply and the suction takingpipe from the carburettor.- Check that there are no fuel leaks between thetwo tubes.- Cl

N.B.THE FILTER CAN BE UNSCREWED FROM THE COCK TOFACILITATE CLEANING.Removing the carburettor- To detach the carburettor from the engine, re-move the t

- Remove the chamber components following theprocedure below.- Undo the 2 screws fixing the intake pump dia-phragm cover.- Remove the cover being care

-Remove the minimum nozzle.- Remove the sprayer tilting the carburettor body.N.B.THIS OPERATION IS NECESSARY TO AVOID LOSINGSPRAYER PARTS WHEN CLEANIN

Refitting the carburettor- Before refitting, wash the carburettor body accu-rately with a degreasing solvent and compressedair.- Pay special attention

- Wash and blow the minimum nozzle properly andreassemble it.- Accurately wash and blow the components of themaximum circuit, the sprayer, the diffuse

Specification Desc./QuantityFront tyre pressure 1.6 barRear tyre pressure: 2 barLight alloy rims (Front rim) 2.50" x 11"Light alloy rims (re

- Check the diaphragm is in good conditions andremove the remaining components of the acceler-ating pump following these steps:- Insert the O-Ring in

- Insert the diaphragm into the throttle valve.- Insert the tapered pin together with the plasticsupport and the contrast spring into the throttlevalv

- The starter should disconnect progressively bymeans of electric heating.- Check the starter resistance when adjusted to theambient temperature.Chara

- Insert rubber pipes for chamber ventilation.- Insert the O-Ring, the washer, the spring and theidle flow screw in their seatings.- Refit the carbure

- Using the rpm indicator in the analyser or a sep-arate one, adjust the idle screw.N.B.THE WASTED SPARK IGNITION SYSTEM OFFERS RE-MARKABLE POWER. REA

INDEX OF TOPICSSUSPENSIONS SUSP

FrontRemoving the front wheel- Remove the five Allen screws that fix the wheelto the hub.N.B.BEFORE REMOVING THE WHEEL HUB, REMOVE THEBRAKE CALLIPER.S

Front wheel hub overhaul- Remove the ball bearing check Seeger ring indi-cated in the pictureExtract the ball bearing using the specific toolSpecific

- Heat the roller bearing seat with a heat gun- Use the specific tool to introduce and push thebearing until it stops, with the shielded side facingou

RemovalRemove the handlebar cover before carrying outthis operation,.- After removing the transmissions and discon-necting the electrical terminals, r

N.B.FOR SAFETY LOCKS, SEE THE «PRE-DELIVERY» CHAPTER.FRONT BRAKEName Torque in NmBrake fluid pump-hose fitting 8 ÷ 12Brake fluid pipe-calliper fitting

Overhaul-The front suspension service operation is useful to replace the connecting parts between the steeringtube and the swinging hub of the front w

- Fit both dust guard rings «C» on the swinging hubas shown in the detail drawing «A».- Connect the swinging hub to the steering tubewith the guide pi

* Supplied with the toolSpecific tooling020021Y Front suspension service toolRecommended productsAGIP GREASE PV2 Grease for control leverson the engin

RefittingWhen fitting the fork, lubricate with the steeringbearing tracks with the recommended grease.Tighten the lower ring nut "A" and the

Removal- Remove the steering tube- Remove the shock absorber lower clamps- Remove the shock absorber upper clampsRefittingTo refit, carry out the remo

- Before refitting the bracket in the wheel axle,place the O-ring as shown in the photograph sothat it is correctly placed after fitting the bracket.-

- Suitably hold the brake calliper - shock absorberattachment bracket- Fit a new oil seal and move it until it stops usingthe specific toolSpecific to

White anhydrous-calcium based grease to protectroller bearings; temperature range between -20 °C and +120 °C; NLGI 2; ISO-L-XBCIB2Steering bearingRemo

Refitting the rear wheel- Fit the wheel, tighten the nut to the prescribedtorque.- Refit the cap and the split pin folding it correctlyas shown in the

RefittingFor rifting, respect the locking torquesLocking torques (N*m)Part C 33 ÷ 41 Part B 44 ÷ 52 Part A 33 ÷ 41Shock absorbersVespa LX 50 4valvole

Cylinder - piston assy.COUPLING BETWEEN PISTON AND CYLINDERNameInitials Cylinder Piston Play on fittingCylinder A 38.993 ÷ 39.000 38.954 ÷ 38.961 0.03

Removal- To replace the shock absorber remove the bat-tery access flap to reach and remove the shockabsorber/ frame anchoring nut. Then remove theshoc

INDEX OF TOPICSBRAKING SYSTEM BRAK SYS

1. Tank cover.2 - Pump body.3 - Brake lever.4 - Pump plunger.5- Oil delivery hose.6 - Protection cap for air bleed screw.7- Calliper.8- Dust guard9- P

- bed the O-Ring gasket (4) on a calliper body.- Couple the internal body with the external one with assembling bolts. Refitting the pads and purginga

tightening torque 5 ÷ 6.5 NmDisc InspectionSpecific tooling020335Y Magnetic support for dial gaugeCharacteristicMax oscillation allowed0.1 mm.Front br

on the bleed screws until no more air comes out ofthe system.The operation is finished when just oil comes outof the bleed screws.-Do up the bleed scr

Removal- Bleed the circuit and drain the brake fluid throughthe bleeding screw located on the calliper and ac-tuate the brake lever until no more flui

5. Sealing ring.6. Piston.7. Gasket.8. Spring.Rear drum brakeOnce the muffler and the wheel have been re-moved, follow these steps:1.Remove the shoe s

INDEX OF TOPICSCHASSIS CHAS

Seat- Lift the saddle and remove the helmet compart-ment «A».- Undo the two screws indicated.Rear handlebar coverUndo the screws as shown in the figur

- Measure the diameter of the bearings on the pis-ton.CharacteristicPin seat diameter13 +0.005 +0.010 mm- Calculate the piston pin coupling clearance.

Instrument panelOperate the 4 screws shown in the figure to re-place the instrument panel.Front handlebar cover• Remove the 2 screws in the rear handl

Headlight assy.After removing the front handlebar cover, operatethe 4 screws shown in the figure and remove theheadlight.Knee-guard- Unscrew the 2 scr

Taillight assy.- Undo the two fixing screws and remove the rearlight unit.- Undo the screw indicated and disconnect theconnector.Footrest- Operate on

Side fairings- Undo the screw «A» and the smaller screw «B».- Detach the seats on the fairing.License plate holder- Remove the side fairings.- Working

Air filter- Remove the helmet compartment.- Remove the side fairings.- Undo the two indicated clamps to the crankcase.- Undo the two clamps indicated.

Fuel tankVespa LX 50 4valvole ChassisCHAS - 165

- Adequately support the rear part of the scooter.- Remove the wheel and the rear mudguard.- Remove the battery compartment.- Disconnect the fuel outl

- Remove the turn indicators.- Remove the rear light unit and undo the indicatedscrew.- Unscrew the closing cap.- Lower the fuel tank and disconnect t

Front mudguard- First remove the steering tube and uncouple thefront brake pipes from the calliper in order to re-move the front mudguard- Remove the

INDEX OF TOPICSPRE-DELIVERY PRE DE

- Pistons and cylinders are classified into catego-ries based on their diameter. The coupling is car-ried out in pairs (A-A, B-B, C-C, D-D).Characteri

Aesthetic inspection- Paintwork- Fitting plastics parts- Damage- DirtTightening torques inspectionLock check- All tightening torques- External screw o

NEVER USE FUSES WITH A CAPACITY HIGHER THAN THE RECOMMENDED CAPACITY. USINGA FUSE OF UNSUITABLE RATING MAY SERIOUSLY DAMAGE THE VEHICLE OR EVEN CAUSEA

CHECK AND ADJUST TYRE PRESSURE WITH TYRES AT AMBIENT TEMPERATURE.CAUTIONNEVER EXCEED THE RECOMMENDED INFLATION PRESSURES OR TYRES MAY BURST.WARNINGBE

INDEX OF TOPICSTIME TIME

EngineENGINECodeAction Duration1 001001 Engine from frame - Removal and re-fit.2 003064 Engine oil - ChangeTime Vespa LX 50 4valvoleTIME - 174

CrankcaseCRANKCASECodeAction Duration1 001133 Engine crankcase - ReplacementCrankshaftVespa LX 50 4valvole TimeTIME - 175

CRANKSHAFTCode Action Duration1 001117 Crankshaft - Replacement2 001099 Oil seal, flywheel side - Replacement3 001100 Oil seal, clutch side - Replacem

Cylinder head assy.HEADCodeAction Duration1 001056 Head gasket - Replacement2 001045 Valves - Replacement3 001126 Head - ReplacementVespa LX 50 4valvo

Rocker arms support assy.CAMSHAFT SUPPORTCodeAction Duration1 001049 Valve clearance - Adjustment2 001148 Valve rocking levers - Replacement3 001044 C

Cylinder head coverHEAD COVERCodeAction Duration1 001093 Spark plug - Replacement2 001088 Head cover gasket - Replacement3 001097 Cooling hood - Repla

Name Description Dimensions Initials Quantity2nd Compression ring 39 x 1 A 0.05 ÷ 0.20Oil scraper ring 39 x 2 A 0.20 ÷ 0.701st Compression ring1st Ove

Driven pulleyDRIVEN PULLEY - CLUTCHCodeAction Duration1 001110 Driven pulley - Replacement2 001012 Driven pulley - Overhaul3 001022 Clutch - Replaceme

Oil pumpOIL PUMPCodeAction Duration1 001051 Belt/Timing chain - Change2 001112 Oil pump - change3 001042 Oil pump - Service4 001121 Chain cover oil se

Final gear assy.FINAL REDUCTION GEAR ASSEMBLYCodeAction Duration1 004125 Rear wheel axle - Replacement2 001156 Gear reduction unit cover - Replace-men

Driving pulleyREAR-VIEW PULLEYCodeAction Duration1 001177 Variator rollers / shoes - Replace-ment2 001086 rear-view half-pulley - Replacement3 001066

Transmission coverTRANSMISSION COVERCodeAction Duration1 001096 Transmission crankcase cover - re-place2 001132 Transmission air inlet pipe - Replace-

Starter motorELECTRICAL START-UPCodeAction Duration1 001020 Starter motor - Replacement2 005045 Starter motor cable harness - Re-placement3 001017 Sta

Flywheel magnetoMAGNETO FLYWHEELCodeAction Duration1 001067 Stator - Fitting and Refitting2 001173 Rotor - Replacement3 001102 Net oil filter - Replac

CarburettorCARBURETTORCodeAction Duration1 001063 Carburettor - Replacement2 001008 Carburettor - Inspection3 003058 Carburettor - Adjustment4 001081

Exhaust pipeMUFFLERCodeAction Duration1 001009 Muffler - Replacement2 001095 Muffler guard - Replacement3 001136 Exhaust emissions - AdjustmentTime Ve

Air cleanerAIR CLEANERCodeAction Duration1 004122 Air cleaner carburettor fitting - Re-placement2 001014 Air filter - Replacement / cleaning3 001015 A

Measure the bearings along X and Y axesCharacteristicCrankshaft bearing, transmission side20 -0.012 -0.025 mmCrankshaft bearing, flywheel side17 +0.00

FrameFRAMECodeAction Duration1 004001 Frame - Replacement2 004023 Shield rim - Replacement3 004149 Shield central cover - Replacement4 004159 Plates /

Centre-standSTANDCodeAction Duration1 004004 Stand - Replacement2 004171 Stand support plate - ReplacementVespa LX 50 4valvole TimeTIME - 191

FootrestsFOOTRESTCodeAction Duration1 004178 Footrest - Replacement2 004078 Front/rear footrest rubber - Replace-mentTime Vespa LX 50 4valvoleTIME - 1

Rear coverSHIELD BACK PLATECodeAction Duration1 004174 Trunk levers - Replacement2 004065 Legshield, rear part - Removal andrefitting3 004081 Glove bo

Underseat compartmentHELMET COMPARTMENTCodeAction Duration1 004016 Helmet compartment - Replacement2 005046 Battery cover - change3 004011 Central fra

Plate holderLICENSE PLATE HOLDERCodeAction Duration1 004136 License plate holder support - Re-placement2 005048 Licence plate holder - Replacement3 00

MudguardMUDGUARDSCodeAction Duration1 004002 Front mudguard - Replacement2 004009 Rear mudguard - ReplacementTime Vespa LX 50 4valvoleTIME - 196

Fuel tankFUEL TANKCodeAction Duration1 004168 Fuel tank cap - Replacement2 005010 Tank float - Replacement3 004112 Cock-carburettor hose - Replace-men

Rear shock-absorberREAR SHOCK ABSORBERCodeAction Duration1 003007 Rear shock absorber - Removal andRefittingTime Vespa LX 50 4valvoleTIME - 198

Steering column bearingsSTEERING FIFTH WHEELSCodeAction Duration1 003002 Steering fifth wheels - Replacement2 003073 Steering clearance - Adjustment3

MANUALESTAZIONE DISERVIZIOVespa LX 50 4valvoleThe descriptions and illustrations given in this publication are not binding. While the basic specificat

- Install the crankshaft on the support and measurethe displacement at the 4 points shown in the fig-ure.N.B.IF VALUES OTHER THAN THOSE ALLOWED ARE DE

Handlebar coversODOMETER - HANDLEBAR COVERSCodeAction Duration1 004018 Handlebar front section - Replace-ment2 004019 Handlebar rear section - Replace

Handlebar componentsHANDLEBAR COMPONENTSCodeAction Duration1 004066 Driving mirror - Replacement2 002037 Brake or clutch lever - Replacement3 002071 L

Swing-armSWINGING ARMCodeAction Duration1 001072 Engine-frame connection swingingarm - ReplacementTime Vespa LX 50 4valvoleTIME - 202

SeatSADDLECodeAction Duration1 004003 Saddle - Replacement2 004131 Luggage rack support - ReplacementVespa LX 50 4valvole TimeTIME - 203

Turn signal lightsTURN INDICATOR LIGHTSCodeAction Duration1 005002 Front headlamp - change2 005012 Front turn indicator - Replacement3 005067 Front tu

Front wheelFRONT WHEELCodeAction Duration1 004123 Front wheel - Replacement2 003047 Front tyre - Replacement3 003037 Front wheel rim - Replacement4 00

REAR WHEELCode Action Duration1 004126 Rear wheel tyre - Replacement2 001071 Rear wheel rim - Removal and Refit-ting3 001016 Rear wheel - Replacement4

Electronic controlsELECTRIC CONTROLSCodeAction Duration1 005039 Lights switch - Replacement2 005006 Light or turning indicator switch - Re-placement3

TransmissionsTRANSMISSIONSCodeAction Duration1 002053 Rear brake transmission complete -Replacement2 002051 Odometer transmission assembly -Replacemen

Front suspensionFRONT SUSPENSIONCodeAction Duration1 003045 Steering tube - Replacement2 003010 Front suspension - Service3 003035 Shock absorber supp

- Using a trued bar check that the cylinder headsurface is not worn or distorted.- Check that the camshaft and rocking lever pinbearings show no signs

Braking systemBRAKING SYSTEMCodeAction Duration1 002021 Front brake hose - Remov. and Re-fitt.2 002007 Front brake shoes/pads - Remov.and Refitt3 0020

Secondary air boxSECONDARY AIR HOUSINGCodeAction Duration1 001164 Crankcase secondary air connection- Replacement2 001161 Secondary air filter - Repla

AAir filter: 40, 164BBattery: 50, 60Brake: 152–155, 157CCarburettor: 13, 36, 125, 128, 187EEngine oil: 40Engine stop: FFuel: 49, 124, 165, 197HHeadlig

Measure the unloaded spring length.•Standard length: 31.3 mm•Admissible limit after use: 29.3- Clean the valve seats of any carbon residues.- Using th

- Measure the diameter of the valve stems in thethree positions indicated in the diagram.STANDARD DIAMETERSpecification Desc./QuantityInlet 3.970 ÷ 3.

Measure the valve guidesVALVE GUIDE DIAMETERSpecification Desc./QuantityValve guide Standard diameter: 4 + 0.012 mmValve guide Maximum admissible diam

- Inspect the cam shaft for signs of abnormal wearon the cams.CharacteristicStandard diameter - Bearing A:Ø 12 +0.002 +0.010mm Standard diameter - Bea

Slot packing systemCharacteristicCompression ratio11.5 ÷ 12 : 1PISTON PROTRUSION CHECKNameMeasure A Thicknessshimming_1 1.7 ÷ 1.95 0.25shimming_2 1.95

INDEX OF TOPICSTOOLING TOOL

TOOLSStores code Description001467Y008 Pliers to extract 17 mm ø bearings001467Y029 Bell for bearings, O.D. 38 mm004499Y Bearing extractor. Fitted wit

Stores code Description020055Y Wrench for steering tube ring nut020074Y Tool to align crankshaft020150Y Air heater support020151Y Air heater020162Y Fl

MANUALE STAZIONE DISERVIZIOVespa LX 50 4valvoleQuesto manuale per stazioni di servizio è stato realizzato da Piaggio & C. Spa per essere utilizzat

Stores code Description020288Y Fork to assemble piston on cylinder020291Y Valve fitting/ removal tool020306Y Punch for assembling valve seal rings0203

Stores code Description020332Y Digital rpm indicator020334Y Multiple battery charger020335Y Magnetic support for dial gauge020340Y Flywheel and transm

Stores code Description020360Y 52x55-mm Adaptor020362Y 12 mm guide020363Y 20-mm guide020364Y 25-mm guide020376Y Adaptor handle020431Y Valve oil seal e

Stores code Description020432Y Tool to fit the start-up sector spring020439Y 17-mm guide020444Y Pin fitting/removal tool020448Y Pin lock fitting tool0

Stores code Description020456Y Ø 24 mm adaptor020565Y Flywheel lock calliper spanner020683Y Valve pressing memberTooling Vespa LX 50 4valvoleTOOL - 34

INDEX OF TOPICSMAINTENANCE MAIN

Maintenance chartSCHEDULED MAINTENANCE TABLEI: CHECK AND CLEAN, ADJUST, LUBRICATE OR REPLACE IF NECESSARY.C: CLEAN, R: REPLACE, A: ADJUST, L: LUBRICAT

- Disassemble the carburettor in its parts, wash allof them with solvent, dry all body grooves withcompressed air to ensure adequate cleaning.- Check

Checking the spark advanceThe vehicle is fitted with a variable advance elec-tronic device. There are two timing references onthe flywheel cover in or

Spark plugDisconnect and remove the spark plug tube.- Examine it carefully and replace it if the insulatoris chipped or cracked.- Measure electrode ga

INDEX OF TOPICSCHARACTERISTICS CHARTOOLING TOOLMAINTENANCE MAINTROUBLESHOOTING TROUBLELECTRICAL SYSTEM ELE SYSENGINE FROM VEHICLE ENG VEENGINE ENGSUSP

SAE 80W/90 Oil that exceeds the requirements ofAPI GL3 specificationsReplacementRemove the oil filler cap/dipstick "A".- Unscrew the oil dra

ReplacementLoosen the oil filler plug.- Unscrew the drainage plug from the mesh filteron the flywheel side, and let the oil drain off.- Tighten the dr

- After this operation, refit the filter and screw theoil cap at the prescribed torque using a new O-Ring- Refill the engine with oil through the oil

Checking the valve clearance- Remove the spark plug access cover, undo the4 fixing screws indicated in the figure and removethe tappet cover.- To chec

CO checkThe check may be necessary in the event of irreg-ularities in the engine performances, or when ad-justing the engine idle speed.- The test mus

10) Slowly twist the throttle handgrip, bringing theengine up to a speed of 4,000 rpm and then re-lease it; check the idle speed is the same as be-for

INDEX OF TOPICSTROUBLESHOOTING TROUBL

EnginePoor performancePOOR PERFORMANCEPossible Cause OperationAir filter obstructed or dirty. Dismantle the sponge, wash with water and shampoo, thens

Possible Cause OperationFailing automatic starter on the carburettor Check the electrical wiring and mechanical movement, replaceif necessary.Wrong ig

High fuel consumptionEXCESSIVE FUEL CONSUMPTIONPossible Cause OperationAir filter blocked or dirty. Dismantle the sponge, wash with water and shampoo,

INDEX OF TOPICSCHARACTERISTICS CHAR

Electrical systemBatteryBATTERYPossible Cause OperationThe battery is the electrical device in the system that requiresthe most frequent inspections a

Possible Cause OperationIn conclusion, check the tightening torque of the wheel hub, thebrake calliper, the shock absorber disk in the attachment to t

INDEX OF TOPICSELECTRICAL SYSTEM ELE SYS

1. Light remote control2. Light switchVespa LX 50 4valvole Electrical systemELE SYS - 53

3.Town light bulb4. Instrument panel lighting bulbs5. Headlight warning light6. Filament for rear position light7. High-beam warning light8. Headlight

Rs = Pink, R = Red, Vi = Purple, V = GreenConceptual diagramsVespa LX 50 4valvole Electrical systemELE SYS - 55

Ignition11.Electronic ignition deviceElectrical system Vespa LX 50 4valvoleELE SYS - 56

16.HV coil17.Key switch contacts19.Fuse 10A33.Fuse 15A34.Battery35.Key switch contacts38.Pick-UpVespa LX 50 4valvole Electrical systemELE SYS - 57

Headlights and automatic starter section1. Light remote controlElectrical system Vespa LX 50 4valvoleELE SYS - 58

2. Light switch3.Town light bulb4. Instrument panel lighting bulbs5. Headlight warning light6. Filament for rear position light7. High-beam warning li

RulesSafety rules- If work can only be done on the vehicle with the engine running, make sure that the premises are well-ventilated, using special ext

Battery recharge and starting23.Stop buttonsElectrical system Vespa LX 50 4valvoleELE SYS - 60

27.Voltage regulator29.Stop light filament30.Starter button31.Starter motor32.Starter remote control switch33.Fuse 15A34.Battery35.Key switch contacts

Level indicators and enable signals section10.NTC temperature sensorElectrical system Vespa LX 50 4valvoleELE SYS - 62

11.Electronic ignition device24.Low fuel warning light25.Fuel gauge26.S.I.S. Valve28.Fuel level transmitter33.Fuse 15A34.Battery35.Key switch contacts

Turn signal lights12. Turn indicator switchElectrical system Vespa LX 50 4valvoleELE SYS - 64

13. Left turn indicator bulbs14. Turn indicator warning light15. Right turn indicator bulbs21.Horn button22.Horn27.Voltage regulator33.Fuse 15A34.Batt

Checks and inspectionsIn case the cause of ignition failure or malfunctioncannot be easily identified at sight, first of all re-place the control unit

Ignition circuitAll the control operations of the system that require the disconnection of cables (checks of the connec-tions and the devices making u

If non-conforming values are measured, replace the HV coil. To carry out a more complete diagnosis,check the peak voltage with the multimeter adaptor.

Electric characteristicHigh voltage coil voltage valueHigh voltage coil voltage value: > 100 VoltStator check- Using a tester, check the resistance

Vehicle identificationVEHICLE IDENTIFICATIONSpecification Desc./QuantityChassis prefix ZAPC383000001001Engine prefix C383MDimensions and massVespa LX

properly. Check the cable harness from the lightswitch to the remote control and whether theswitch works properly .If no voltage is detected, try conn

which may cause a short circuit to ground (thuspreventing damaging the regulator).Afterwards measure the resistance between con-tact 3 (Orange) and co

Turn signals system check4) TURN INDICATORS NOT WORKINGIf the turn indicators do not work, do the following:- Remove the regulator connector and place

ConnectorsELECTRONIC STARTERSECTION "A"1. HV COIL CONTROL2. KEY SWITCH CONTACTS TO GROUND3. HV COIL POSITIVESECTION "B"1. KEY POSI

INDEX OF TOPICSENGINE FROM VEHICLE ENG VE

Exhaust assy. Removal- Remove the 2 fixing nuts from the manifold to thehead- Undo the 2 screws fixing the muffler to the hous-ing; then remove the wh

INDEX OF TOPICSENGINE ENG

Automatic transmissionTransmission cover- Remove the 12 fixing screws.- Remove the oil filling cap and then slide out thecover.If this operation is ca

Removing the driven pulley shaft bearing- Slightly heat the crankshaft from the inside sideto avoid damaging the coated surface and use thedriven pull

Inspecting the clutch drum- Check that the clutch bell is not worn or damaged.- Measure the inner diameter of the clutch bell.CharacteristicClutch bel

WEIGHT AND DIMENSIONSSpecification Desc./QuantityDry weight 102 ± 5Width 740 mmLength 1755 mmWheelbase 1290 mmMaximum height 1140 mmEngineENGINESpecif

Inspecting the clutch- Check the thickness of the clutch mass frictionmaterial.- The masses must not show traces of lubricants;otherwise, check the dr

Removing the driven half-pulley bearing- Remove the roller bearing with the special ex-tractor inserted from the bottom of the fixed half-pulley.CAUTI

Inspecting the driven sliding half-pulley- Remove the 2 inner sealing rings and the two O-rings.- Measure the inside diameter of the mobile half-pulle

020456Y Ø 24 mm adaptor020362Y 12 mm guide020171Y Punch for Ø 17 mm roller caseInspecting the clutch spring- Check that the contrast spring of the dri

- Reassemble the nut securing the clutch and tight-en to the prescribed torque.CAUTIONSO AS NOT TO DAMAGE THE CLUTCH NUT USE A SOCK-ET WRENCH WITH SMA

Removing the driving pulley- Lock the driving pulley using the appropriate tool.- Remove the central nut with the related washer,then remove the drive

20.12 mmDriving pulley/ Standard diameter:20.021 mmDriving pulley bushing/ Diameter maximum:XXX mmDriving pulley bushing/ Standard diameter:20 -0.020/

Refitting the transmission cover- Check the following for wear: toothed section,toothed section shaft, cover seat bushing, pinionshaft and its seating

Removing the hub cover• Remove the transmission cover• Remove the clutch assembly• Discharge the rear hub oil.• Remove the 5 screws indicated in the f

Removing the driven pulley shaft bearing- Remove the Seeger ring inside the cover.- Remove the oil seal from the outside.- Remove the centring dowels

CapacitiesCAPACITYSpecification Desc./QuantityEngine oil ~ 850 cm³Transmission oil 80 cm³Fuel tank (reserve) ~ 8.5 l (2 l)Electrical systemWhen the ad

Refitting the driven pulley shaft bearing- Support the inner track of the bearing from theoutside of the hub cover with the specific tool posi-tioned

Refitting the ub cover- Refit the whole wheel axle.- Refit the intermediate gear paying attention to thetwo shim washers.- Apply LOCTITE 510 for surfa

Cooling fan- Remove the cooling fan by undoing the 3 screwsfixing it to the rotor- When refitting the fan, pay attention that thescrew holes in the fa

Refitting the stator- Refit the stator and flywheel carrying out the re-moval procedure in reverse, tightening the retain-ers to the specified torque.

Removing the flywheel magneto- Lock the rotation of the flywheel using the calliperspanner.- Remove the nut.CAUTIONTHE USE OF A CALLIPER SPANNER OTHER

Starter gear rim- Check the toothing is level and in good conditionsIntermediate gear- Check that the keying toothing on the crown andthe starter moto

Refitting the starter motor- Install the starter motor in its seating in the crank-case.- Tighten the screw on the head side but do notlock it, screw

Removing the timing system drive- Temporarily loosen the tensioner central screwand remove it together with the spring.- Unscrew the 2 retainers indic

Removing the cam shaft- Remove the limit screw of the rocking lever pinsshown in the figure.- Remove the Seeger ring retaining the camshaftbearing.- R

Removing the cylinder head- Remove the cooling covers, the timing control,the camshaft and the rocking levers.- Remove the spark plug.- Remove the 2 s