VESPA LX 50 Spécifications Page 1

WORKSHOP MANUAL633416Vespa LX 50

Specification Desc./QuantityFuel supply Gravity feed, with unleaded petrol (with a minimum octane rat-ing of 95) with carburettor.Cooling system force

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

- Remove the fifth wheel fitting and the dust guardon the steering tube as shown in figure, using thespecific tool. Proceed giving a few taps with the

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 Suspensio

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

Wheels and tyresWHEELS AND TYRESSpecification Desc./QuantityFront tyre size 110/70"-11"Rear tyre size 120/70-10"Front tyre pressure 1.6

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

The operation is finished when just oil comes outof the bleed screws.-Do up the bleed screw.-When the operation is over, tighten up the oilbleed screw

Rear drum brakeOnce the muffler and the wheel have been re-moved, follow these steps:1.Remove the shoe spring using the specific span-ner.2. Remove th

INDEX OF TOPICSCHASSIS CHAS

Rear handlebar coverUndo the screws as shown in the figure and re-move the handlebar rear section.Instrument panelOperate the 4 screws shown in the fi

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

Footrest- Operate on the 3 screws shown in the figure oncethe glove-box and fairing have been removed.Air filter- Remove the helmet compartment.- afte

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

Aesthetic inspectionAppearance check:- Paintwork- Fitting of plastics- Scratches- DirtTightening torques inspectionLock check- Safety locks- clamping

Carburettor50cc VersionDell'OrtoDELLORTO CARBURETTORSpecification Desc./QuantityType PHVA 17.5 RDDiffuser diameter Ø 17.5Regulation reference num

CAUTIONTO ENSURE MAXIMUM PERFORMANCE, THE BATTERY MUST BE CHARGED BEFORE USE.INADEQUATE CHARGING OF THE BATTERY WITH A LOW LEVEL OF ELECTROLYTE BEFORE

- Starting when warm- Starter operation- Minimum hold (turning the handlebar)- Uniform turning of the steering- Possible leaksCAUTIONCHECK AND ADJUST

INDEX OF TOPICSTIME TIME

This section is devoted to the time necessary tocarry out repairs.The description and code for each operation is in-dicated.EngineENGINECodeAction Dur

CrankcaseCRANKCASECodeAction Duration1 001133 Engine crankcase - ReplacementTime Vespa LX 50TIME - 124

CrankshaftCRANKSHAFTCodeAction Duration1 001118 Main bearings - Replacement2 001100 Clutch-side oil seal - Replacement3 001099 Oil seal, flywheel side

Cylinder assy.CYLINDER- PISTONCodeAction Duration1 001002 Cylinder-Piston - Replacement2 001107 Cylinder / piston - Inspection / clean-ingTime Vespa L

Cylinder head assy.HEADCodeAction Duration1 001097 Cooling hood - Replacement2 001093 Spark plug - Replacement3 001126 Head - Replacement4 001013 Inta

Driven pulleyDRIVEN PULLEY - CLUTCHCodeAction Duration1 001012 Driven pulley - overhaul2 001110 Driven pulley- Replacement3 001022 Clutch - Replacemen

Oil pumpOIL PUMPCodeAction Duration1 001028 Mix movement gear socket - Re-placement2 001019 Mixer belt - replacement3 001018 Mixer - ReplacementVespa

Name Torque in NmFlywheel fan screws 3 ÷ 4Half-crank case joint bolts 12 ÷ 13Bolts holding exhaust pipe to the crankcase 22 ÷ 24Screws holding the fil

Final gear assy.FINAL REDUCTION GEARCodeAction Duration1 001010 Geared reduction unit - Service2 001156 Gear reduction unit cover - Replace-ment3 0030

Driving pulleyDRIVING PULLEYCodeAction Duration1 001066 Driving pulley - Removal and refitting2 001086 Driving half-pulley - replace3 001011 Driving b

Transmission coverTRANSMISSION COVERCodeAction Duration1 001087 Flywheel cover - Replacement2 001135 Transmission cover bearing - Re-placement3 001096

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

Flywheel magnetoMAGNETO FLYWHEELCodeAction Duration1 001109 Cooling fan - Replacement2 001173 Rotor - Replacement3 001067 Stator - Fitting and Refitti

CarburettorCARBURETTORCodeAction Duration1 001008 Carburettor - Inspection2 001063 Carburettor - Replacement3 007020 Carburettor heating tubing - repl

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

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 TimeTIME - 139

Piston ringsSEALING RINGName Description Dimensions Initials QuantityCompression ring 40 A 0.10 to 0.25Compression ring 1stoversize40.2 A 0.10 to 0.25

FootrestsFOOTRESTCodeAction Duration1 004178 Footrest - Replacement2 004078 Front/rear footrest rubber - Replace-mentTime Vespa LX 50TIME - 140

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 50TIME - 144

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

Tank oilOIL RESERVOIRCodeAction Duration1 005018 Oil reservoir float - Replacement2 004017 Oil reservoir - Replacement3 004095 Oil reservoir cock - Re

REAR SHOCK ABSORBERCode Action Duration1 003007 Rear shock absorber - Removal andRefittingSteering column bearingsSTEERING FIFTH WHEELSCodeAction Dura

Handlebar coversTAVOLA COPRIMANUBRIOCodeAction Duration1 004018 Front handlebar covers - Replace-ment2 004019 Rear handlebar covers - Replace-ment3 00

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

Slot packing systemThis type of engines foresees the use of one size of basic gaskets.ProductsRECOMMENDED PRODUCTS TABLEProductDescription Specificati

Swing-armSWINGING ARMCodeAction Duration1 001072 Engine-frame connection swingingarm - ReplacementTime Vespa LX 50TIME - 150

SeatSADDLECodeAction Duration1 004003 Saddle - Replacement2 004131 Luggage rack support - ReplacementVespa LX 50 TimeTIME - 151

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

TransmissionsTRANSMISSIONCodeAction Duration1 002051 Odometer transmission assembly -Replacement2 002012 Splitter - Replacement3 002057 Carburettor /

Brake callipersCALLIPERCodeAction Duration1 002021 Front brake hose - Remov. and Re-fitt.2 002007 Front brake shoes/pads - Remov.and Refitt3 002039 Fr

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

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

INDEX OF TOPICSTOOLING TOOL

AAir filter: 33, 116BBattery: 42, 48, 54, 55Brake: 108–112, 157CCarburettor: 12, 30, 135EEngine stop: FFuel: 41, 89, 145HHeadlight: 36, 115Horn: Hub o

ATTREZZATURAStores code Description001330Y Tool for fitting steering seats001467Y006 Pliers to extract 20 mm bearings001467Y009 Driver for OD 42-mm be

Stores code Description006029Y Punch for fitting fifth wheel seat on steer-ing tube020004Y Punch for removing fifth wheels fromheadstock020055Y Wrench

Stores code Description020166Y Pin lock fitting tool020261Y Starter spring fitting020265Y Bearing fitting base020325Y Pliers for brake-shoe springs020

WORKSHOPMANUALVespa LX 50The descriptions and illustrations given in this publication are not binding. While the basic specificationsas described and

Stores code Description020331Y Digital multimeter020332Y Digital rpm indicator020333Y Single battery charger020334Y Multiple battery chargerTooling Ve

Stores code Description020335Y Magnetic support for dial gauge020350Y Electrical system check instrument020359Y 42x47-mm Adaptor020376Y Adaptor handle

Stores code Description020456Y Ø 24 mm adaptor020565Y Flywheel lock calliper spanner494929Y Exhaust fumes analyser001467Y029 Bell for bearings, O.D. 3

Stores code Description020021Y Front suspension service tool020038Y Punch020074Y Support base for checking crankshaftalignment004499Y001 Bearing extra

Stores code Description004499Y002 Bearing extractor screw004499Y007 Half rings020171Y Punch for driven pulley roller bearing020340Y Flywheel and trans

Stores code Description020363Y 20-mm guide020365Y 22 mm guide020439Y 17-mm guide020441Y 26 x 28 mm adaptor020452Y Tube for removing and refitting the

Stores code Description020451Y Starting ring gear lock020444Y Tool for fitting/ removing the driven pulleyclutchTooling Vespa LX 50TOOL - 26

INDEX OF TOPICSMAINTENANCE MAIN

Maintenance chartEVERY 2 YEARSActionBrake fluid - changeAFTER 1000 KM50'ActionHub oil - changeOil mixer/throttle linkage - adjustmentOdometer gea

ActionHub oil level - checkSpark plug/electrode gap - replacementAir filter - cleaningOil mixer/throttle linkage - adjustmentDriving belt - replacemen

WORKSHOP MANUALVespa LX 50This workshop manual has been drawn up by Piaggio & C. Spa to be used by the workshops of Piaggio-Gilera dealers. This m

(*) See regulations in the «Adjusting the idle speed» section(**) See regulations in the «Secondary air system» sectionAFTER 60000 KM150'ActionHu

1. Automatic starter - 2. Idle air set screw - 3. Idle speed set screw - 4. Throttle valve spring - 5. Throttlevalve tapered pin - 6. Throttle valve -

- Engage the spark plug with the due inclinationand screw it right down by hand, then do it up withthe wrench at the prescribed torque;-Put the hood o

Replacement-Remove the oil cap «A».- Unscrew the oil drainage cap "B" and drain outall the oil.- Screw on the drainage plug and fill up the

Checking the ignition timing- Adjust the control cables:Mix cable: see procedure indicated in "Mixer tim-ing".Throttle cable: adjust the set

Level checkProceed as follows:- Rest the vehicle on its centre stand with the han-dlebars perfectly horizontal;- Check the level of liquid with the re

Headlight adjustmentProceed as follows:1. Place the vehicle, in running order and with thetyres inflated to the prescribed pressure, on a flatsurface

- If the parameters found do not agree with the above figures, act upon the idle adjusting screw. Oth-erwise, check the automatic choke deviceSpecific

INDEX OF TOPICSTROUBLESHOOTING TROUBL

This section makes it possible to find the solutions to use in troubleshooting.For each breakdown, a list of the possible causes and respective interv

Possible Cause Operationto keep the cap in contact with the spark plug and the sparkplug grounded but away from its hole. Refit a dry spark plugand st

High fuel consumptionHIGH FUEL CONSUMPTIONPossible Cause OperationAir filter blocked or dirty. Clean according to the procedureStarter inefficient Che

Brakes overheatingBRAKES OVERHEATINGPossible Cause OperationDefective piston sliding Check calliper and replace any damaged part.Brake disc or drum de

Possible Cause Operationlock-nuts, the limit switch rubber buffers and the movementbushings.Suspension oil leakageOIL LEAKAGE FROM SUSPENSIONPossible

INDEX OF TOPICSELECTRICAL SYSTEM ELE SYS

ELECTRICAL COMPONENTSSpecificationDesc./Quantity1 Rear brake stop button2 Light switch3 Turn indicator switch4 Horn button5 Front left turn indicator6

Specification Desc./Quantity33 Left turn indicator warning light34 Oil warning light35 Dashboard light bulbs Type: BayonetPower: 12V 1.2WQuantity: 336

Headlights and automatic starter sectionLIGHTSSpecificationDesc./Quantity1 Voltage regulator2 Magneto flywheel3 Light switch4 Rear light bulb 12V - 5W

Battery recharge and startingBATTERY RECHARGE AND STARTINGSpecificationDesc./Quantity1 Magneto flywheel2 Voltage regulator3 Main fuse 7,5A4 Brake ligh

Level indicators and enable signals sectionSTART PERMISSIVE BUTTONS AND LEVEL INDICATORSSpecificationDesc./Quantity1 Magneto flywheel2 Voltage regulat

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

Turn signal lightsTURN INDICATORS AND HORNSpecificationDesc./Quantity1 Battery 12V - 4Ah2 Main fuse 7,5A3 Key switch4 Magneto flywheel5 Voltage regula

Ignition circuit1) Check the state of the spark plug (clean it witha metallic brush, remove all incrustations, blow itwith compressed air, and replace

6) Failure of the oil and petrol check lamp.OperationsFAULT 1:Make sure that at 5000 rpm with the lights on thatthe regulation voltage is between 13V

FAULT 4a) By positioning tester 020331Y between the yel-low wire terminal (8) on the regulator and the blackwire (6) (FIG. D), check the generator out

(FIG. G) If the above tests have positive results,jump the contacts 5 (yellow/red) and 7 (blue/black)on the connector, set the key switch to ON andshi

Maximum 24 h3) Constant current battery charge mode-Charge current equal to 1/10 of the nominal capacity of the battery-Duration of the charge: 5 hWAR

A density reading of less than 20° Bé indicates thatthe battery is completely flat and it must thereforebe recharged.After charging the battery, check

Specific tooling020333Y Single battery charger020334Y Multiple battery charger1)- Remove the short closed tube and the caps, then pour sulphuric acid

INDEX OF TOPICSENGINE FROM VEHICLE ENG VE

Removal of the engine from the vehicleRemoving the engine from the frame-Disconnect the battery.-Remove the muffler assembly.- Remove the rear wheel.-

INDEX OF TOPICSCHARACTERISTICS CHAR

INDEX OF TOPICSENGINE ENG

Automatic transmissionTransmission cover- Loosen the 15 screws and remove the transmis-sion cover with the aid of a mallet.N.B.THE CRANKCASE IS SLIGHT

- Remove the seeger ring located on the exteriorof the crankshaft.- Dismantle the dog gear from its seat, slackeningthe tension that the toothed secto

Removing the driven pulley- Lock the clutch bell housing with the specific tool.- Remove the nut, the clutch bell housing and thewhole of the driven p

- Using a 34 mm socket wrench remove the clutchlocking nut.- Loosen the central screw thereby undoing thedriven pulley unit- Separate the components.S

- Remove the three guide pins and the mobile halfpulley.Removing the driven half-pulley bearing- Remove the roller bearing with the special ex-tractor

Stationary driven half-pulley/Standard diame-terØ 33.965 to 33.985 mmStationary driven half-pulley / Minimum diam-eter admitted after useØ 33.96 mmIns

Refitting the driven half-pulley bearing- Fit a new ball bearing with the specific tool.- Fit the ball bearing retention snap ring.- Fit the new rolle

- 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

RulesThis section describes general safety rules for any maintenance operations performed on the vehicle.Safety rules- If work can only be done on the

4) Check the integrity of the sliding blocks of thecontact plate.- Check that the internal bushing shown in the fig-ure is not abnormally worn and mea

ORDER TO AVOID WRONG TIGHTENING AND CONSE-QUENTLY DAMAGING THE CRANKSHAFT KNURLING.Specific tooling020451Y Starting ring gear lockLocking torques (N*m

Removing the wheel axle bearings- Remove the oil seal and the Seeger ring.- Remove the bearing by pushing from the outsidetowards the inside of the ge

Inspecting the hub shaft- Check the three shafts for wear or distortion ofthe toothed surfaces, the bearing housings, andthe oil seal housings.- In ca

Refitting the wheel axle bearing- Heat the half crankcase on the transmission sideusing a thermal gun.- After lubricating its outer strip, insert the

Cooling hood- Remove the four fixings shown in the figure.- Remove the fan cover- Remove the oil piping retention band from thehood- Remove the 2 scre

Removing the stator- Remove the three stator fixings shown in thephoto- Remove the two pick-up fixings shown in thephoto- Remove the stator with the w

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

N.B.A VARIATION OF THE AIR GAP DISTANCE CAN LEAD TOA VARIATION IN THE IGNITION ADVANCE SUCH AS TOCAUSE PINGING, KNOCKING ETC.Locking torques (N*m)Flyw

Removing the cylinder - piston assy.Remove the cylinder very carefullyRemove the snap rings and remove the pinCAUTIONAFTER EACH REMOVAL OPERATION REPL

Vehicle identificationVEHICLE IDENTIFICATIONSpecification Desc./QuantityChassis prefix ZAPC38101 ÷ 1001Engine prefix C381M ÷ 1001Dimensions and massWE

Inspecting the wrist pin- Check the wrist pin external diameter using a mi-crometerCharacteristicWrist pin: standard diameter12 +0.005 +0.001 mmInspec

Inspecting the cylinder- Check that the cylinder does not show seizures.Otherwise, replace it or adjust it respecting the al-lowable increases- Measur

- Use new wrist pin snap rings.- Use new cylinder base gasket.- Before refitting carefully clean all the surfaces.- Use oil to be mixed during the fit

Inspecting the timing system componentsCAUTIONCHECK THE CORRECT REED UNIT SEAL; NO LIGHTMUST PASS BETWEEN THE SUPPORT AND LAMELLA.Crankcase - cranksha

Removing the crankshaft- Install the specific tool on the half crankcase onthe transmission side using four M6 screws of anadequate length.- Remove th

Refitting the crankshaft bearingsHeat the bearings in an oil bath at around 150°Cand fit them on the crankshaft, if necessary usinga section of tube t

- Firmly insert the crankshaft until the bearing rea-ches the end-of-stroke stop- Let the temperature of the half crankcase settleat the temperature o

- Keeping the half crankcase on the transmissionside, insert the flywheel side half crankcase with aclean precise movement- Insert at least three clam

Refitting- Install a new flywheel-side oil seal only with thespecial tool's punchThe flywheel-side oil seal is recognised by itssmaller diameterN

Remove the tube passage seal from the crank-case shown in the figureRefittingTo refit, perform the steps in the reverse directionto disassemblyRemembe

EngineENGINESpecificationDesc./QuantityEngine type Two-stroke, single cylinder Piaggio Hi-PER2Bore x stroke 40 X 39.3 mmCubic capacity 49.40 ccCompres

OF THE TUBE. IN THIS CASE, THE TENDENCY IS TO OB-TAIN A REDUCED FUEL FLOW RATE. THE SUCTION OUT-LET ON THE MANIFOLD HAS A SECTION INTENTIONALLYREDUCED

INDEX OF TOPICSSUSPENSIONS SUSP

This section is devoted to operations that can be carried out on the suspension.FrontRemoving the front wheel- Remove the five Allen screws that fix t

- Remove the oil seal on the roller bearing sideusing a screwdriver.- Remove the roller bearing using the specific toolSpecific tooling020376Y Adaptor

Soap-based lithium grease with NLGI 3; ISO-L-XBCHA3, DIN K3K-20Refitting the front wheel- When refitting, tighten the 5 screws to the speci-fied torqu

Steering columnRemovalAfter removing the upper seat, lean the vehicle onone side and extract the steering tube completelyfrom the fork.Specific toolin

Specific tooling020021Y Front suspension service tool- Use the tool fitted with part 20* and part 21* onits stem as shown in the figure.- Push the two

- Lubricate the sealing rings with mineral oil andhalf-fill the roller casings with grease.- Insert the sealing ring on the pin and the rollerbushing

001330Y Tool for fitting steering seatsRecommended productsAGIP GREASE PV2 Grease for control leverson the engineWhite anhydrous-calcium based grease

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