VESPA LX 150 4T Euro 3 Service Station Manual
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VESPA LX 150 4T Euro 3 Service Station Manual

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SERVICE STATION MANUAL
633977 EN
Vespa LX 125 - 150 4T Euro 3

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Summary of Contents for VESPA LX 150 4T Euro 3

  • Page 1 SERVICE STATION MANUAL 633977 EN Vespa LX 125 - 150 4T Euro 3...
  • Page 2 SERVICE STATION MANUAL Vespa LX 125 - 150 4T Euro 3 The descriptions and images in this publication are given for illustrative purposes only and are not binding. While the basic characteristics as described and illustrated in this booklet remain unchanged, Piaggio &...
  • Page 3 SERVICE STATION MANUAL Vespa LX 125 - 150 4T Euro 3 This service station manual has been drawn up by Piaggio & C. Spa to be used by the workshops of Piaggio dealers. It is assumed that the user of this manual for maintaining and repairing Piaggio vehicles has a basic knowledge of mechanical principles and vehicle repair technique procedures.

  • Page 5: Index Of Topics

    INDEX OF TOPICS CHAR HARACTERISTICS TOOL OOLING MAIN AINTENANCE TROUBL ROUBLESHOOTING ELE SYS LECTRICAL SYSTEM ENG VE NGINE FROM VEHICLE NGINE SUSP USPENSIONS BRAK SYS RAKING SYSTEM CHAS HASSIS PRE DE DELIVERY...
  • Page 6 INDEX OF TOPICS CHAR HARACTERISTICS...

  • Page 7: Safety Rules

    Vespa LX 125 - 150 4T Euro 3 Characteristics Rules This section describes general safety rules for any maintenance operations performed on the vehicle. Safety rules - If work can only be done on the vehicle with the engine running, make sure that the premises are well ventilated, using special extractors if necessary;...

  • Page 8: Vehicle Identification

    Vespa LX 125 - 150 4T Euro 3 Characteristics Vehicle identification VEHICLE IDENTIFICATION Specification Desc./Quantity Chassis prefix (125) ZAPM44300 ÷ 1001 Engine prefix (125) M444M ÷ 1001 Chassis prefix (150) ZAPM44400 ÷ 1001 Engine prefix (150) M445M ÷ 1001 Dimensions and mass...
  • Page 9 Vespa LX 125 - 150 4T Euro 3 Characteristics Specification Desc./Quantity Maximum height 1140 mm Width 740 mm Wheelbase 1280 mm Length 1800 mm Engine ENGINE Specification Desc./Quantity ENGINE Single-cylinder, 4-stroke Piaggio LEADER Timing system Single overhead camshaft (SOHC) with 2 valves Valve clearance intake 0.10...

  • Page 10: Chassis And Suspension

    Vespa LX 125 - 150 4T Euro 3 Characteristics Frame and suspensions CHASSIS AND SUSPENSION Specification Desc./Quantity Chassis Unitised body made of stamped plate. Steering and suspension Steering tube articulated on the front wheel carrier hub; heli- coidal spring suspension and double-acting hydraulic shock absorber;...

  • Page 11: Carburettor Setting

    Vespa LX 125 - 150 4T Euro 3 Characteristics The system is fitted with a control valve that disa- bles operation while decelerating to avoid unwan- ted noise. To ensure the best functioning of the SAS system clean the filter as indicated in the scheduled main- tenance table.

  • Page 12: Tightening Torques

    Vespa LX 125 - 150 4T Euro 3 Characteristics Specification Desc./Quantity Minimum jet Idle air jet (on the body) Idle mixture adjustment screw initial opening 1 ¾ Starter nozzle Starter air jet (on the body) Ø 1.5 Starter pin travel 10 mm (at 24°)

  • Page 13: Crankcase And Crankshaft

    Vespa LX 125 - 150 4T Euro 3 Characteristics CRANKCASE AND CRANKSHAFT Name Torque in Nm Internal engine crankcase bulkhead (transmission-side half 4 to 6 shaft) screws Oil filter on crankcase fitting 27 - 33 Rear brake cam tightening screw...
  • Page 14 Vespa LX 125 - 150 4T Euro 3 Characteristics COUPLING BETWEEN (A ) PISTON AND CYLINDER (150) ERKE Name Initials Cylinder Piston Play on fitting Coupling 62.580 - 62.587 62.533 - 62.540 0.040 - 0.054 Coupling 62.587 - 62.594 62.540 - 62.547 0.040 - 0.054...

  • Page 15: Piston Rings

    Vespa LX 125 - 150 4T Euro 3 Characteristics Name Initials Cylinder Piston Play on fitting Coupling 2nd oversize 57.418 - 57.425 57.365 - 57.372 0.046 - 0.060 Coupling 3rd oversize 57.597 - 57.604 57.544 - 57.551 0.046 - 0.060 Coupling 3rd oversize 57.604 - 57.611...
  • Page 16 Vespa LX 125 - 150 4T Euro 3 Characteristics Crankcase - crankshaft - connecting rod AXIAL CLEARANCE BETWEEN CRANKSHAFT AND CONNECTING ROD Name Description Dimensions Initials Quantity Half-shaft, transmission 16.6 +0-0.05 D = 0.20 - 0.50 side Flywheel-side half shaft 16.6 +0-0.05...
  • Page 17 Vespa LX 125 - 150 4T Euro 3 Characteristics Slot packing system - Provisionally fit the piston into the cylinder, without any base gasket. - Assemble a dial gauge on the specific tool - Set the dial gauge to zero at a contrast plane with an average preload, for example 5 mm. Keeping the zero setting position, fit the tool on the cylinder and lock it with 2 nuts, as shown in the figure.
  • Page 18 Vespa LX 125 - 150 4T Euro 3 Characteristics Specification Desc./Quantity Value measured 1.3 - 1.4 Thickness 0.4 ± 0.05 Products RECOMMENDED PRODUCTS TABLE Product Description Specifications AGIP GEAR SAE 80W-90 Lubricant for gearboxes and transmis- API GL-4 sions. AGIP BRAKE 4 Brake fluid.

  • Page 19: Index Of Topics

    INDEX OF TOPICS TOOL OOLING...

  • Page 20: Specific Tools

    Vespa LX 125 - 150 4T Euro 3 Tooling SPECIFIC TOOLS Stores code Description 001330Y Tool for fitting steering seats 001467Y009 Bell for OD 42-mm bearings 001467Y013 Calliper to extract ø 15-mm bearings 002465Y Calliper for circlips 005095Y Engine support...
  • Page 21 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020004Y Punch for removing steering bearings from headstock 020055Y Wrench for steering tube ring nut 020074Y Support base for checking crankshaft alignment 020150Y Air heater mounting 020151Y Air heater...
  • Page 22 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020262Y Crankcase splitting plate 020263Y Driven pulley assembly sheath 020287Y Clamp to fit piston on cylinder 020306Y Punch for assembling valve seal rings 020329Y Mity-Vac vacuum-operated pump 020330Y...
  • Page 23 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020331Y Digital multimeter 020332Y Digital rpm indicator 020333Y Single battery charger 020334Y Multiple battery charger TOOL - 23...
  • Page 24 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020335Y Magnetic mounting for dial gauge 020357Y 32 x 35-mm Adaptor 020359Y 42 x 47-mm Adaptor 020360Y 52 x 55-mm Adaptor 020363Y 20-mm guide 020364Y 25-mm guide TOOL - 24...
  • Page 25 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020368Y driving pulley lock wrench 020375Y 28 x 30 mm adaptor 020376Y Adaptor handle 020382Y011 adapter for valve removal tool 020412Y 15-mm guide 020414Y 28-mm guide TOOL - 25...
  • Page 26 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020423Y Driven pulley lock wrench 020424Y Driven pulley roller casing fitting punch 020425Y Punch for flywheel-side oil seal 020426Y Piston fitting fork 020427Y Piston assembly band 020428Y Piston position check mounting...
  • Page 27 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020430Y Pin lock fitting tool 020431Y Valve oil seal extractor 020434Y Oil pressure check fitting 020444Y Tool for fitting/ removing the driven pulley clutch 020565Y Flywheel lock calliper spanner...
  • Page 28 Vespa LX 125 - 150 4T Euro 3 Tooling Stores code Description 020481Y005 EFI Technology interface wiring 020922Y Diagnosis Tool TOOL - 28...

  • Page 29: Maintenance

    INDEX OF TOPICS MAIN AINTENANCE...

  • Page 30: Maintenance Table

    Vespa LX 125 - 150 4T Euro 3 Maintenance Maintenance chart MAINTENANCE TABLE I: INSPECT AND CLEAN, ADJUST, LUBRICATE OR REPLACE IF NECESSARY C: CLEAN, R: REPLACE, A: ADJUST, L: LUBRICATE Clean the SAS air filter every 2 years * Check level every 3,000 km...

  • Page 31: Level Check

    Vespa LX 125 - 150 4T Euro 3 Maintenance Level check Proceed as follows: - Rest the vehicle on its centre stand with the han- dlebars perfectly horizontal; - Check the level of liquid with the related warning light «A».

  • Page 32: Headlight Adjustment

    Vespa LX 125 - 150 4T Euro 3 Maintenance Headlight adjustment Proceed as follows: 1. Place the vehicle in running order and with the tyres inflated to the prescribed pressure, on a flat surface 10 m away from a white screen situated in a shaded area, making sure that the longitudinal axis of the vehicle is perpendicular to the screen;...
  • Page 33 Vespa LX 125 - 150 4T Euro 3 Maintenance - Remove the screw fixing the SAS valve to the flywheel cover, indicated in the photograph. - Remove the 6 flywheel cover screws indicated in the photograph and remove the flywheel cover.

  • Page 34: Troubleshooting

    INDEX OF TOPICS TROUBL ROUBLESHOOTING...

  • Page 35: Poor Performance

    Vespa LX 125 - 150 4T Euro 3 Troubleshooting Engine Poor performance POOR PERFORMANCE Possible Cause Operation Air filter blocked or dirty Remove the sponge, wash with water and car shampoo, then soak it in a mixture of 50% petrol and 50% specific oil. Press with your hand without squeezing, allow it to drip dry and refit.
  • Page 36 Vespa LX 125 - 150 4T Euro 3 Troubleshooting Possible Cause Operation Start-up enabling buttons failure Check continuity using an Ohm meter, with the switch pressed; replace if necessary Carburettor nozzles clogged or dirty Dismantle, wash with solvent and dry with compressed air Air filter obstructed or dirty.

  • Page 37: Excessive Fuel Consumption

    Vespa LX 125 - 150 4T Euro 3 Troubleshooting High fuel consumption EXCESSIVE FUEL CONSUMPTION Possible Cause Operation Air filter blocked or dirty Clean according to the procedure Inefficient Starter Check: electric wiring, circuit continuity, mechanical sliding and power supply...
  • Page 38 Vespa LX 125 - 150 4T Euro 3 Troubleshooting Electrical system Battery BATTERY Possible Cause Operation Battery The battery is the electrical device in the system that requires the most frequent inspections and thorough maintenance. If the vehicle is not used for some time (1 month or more) the battery needs to be recharged periodically.

  • Page 39: Noisy Suspension

    Vespa LX 125 - 150 4T Euro 3 Troubleshooting Noisy suspension NOISY SUSPENSION Possible Cause Operation NOISY SUSPENSION If the front suspension is noisy, check: that the front shock ab- sorber works properly and the ball bearings are good condition.

  • Page 40: Electrical System

    INDEX OF TOPICS ELE SYS LECTRICAL SYSTEM...
  • Page 41 Vespa LX 125 - 150 4T Euro 3 Electrical system KEY (With electric pump) 1. Electronic ignition device 2. Immobilizer aerial 3.TPS potentiometer 4. Magneto flywheel - Pick-up 5. Diagnostics socket 6. Ma J2 air valve (150) 7. Voltage regulator 8.
  • Page 42 Vespa LX 125 - 150 4T Euro 3 Electrical system 20. License plate light bulb 21. Rear left turn indicator 22. Rear light assembly 23. Rear right turn indicator 24. Front left turn indicator 25. Headlight A. Twin-filament bulb B. Front position light bulb 26.
  • Page 43 Vespa LX 125 - 150 4T Euro 3 Electrical system KEY (Without electric pump) 1. Electronic ignition device 2. Immobilizer aerial 3.TPS potentiometer 4. Magneto flywheel - Pick-up 5. Diagnostics socket 6. Ma J2 air valve (150) 7. Voltage regulator 8.
  • Page 44 Vespa LX 125 - 150 4T Euro 3 Electrical system 20. License plate light bulb 21. Rear left turn indicator 22. Rear light assembly 23. Rear right turn indicator 24. Front left turn indicator 25. Headlight A. Twin-filament bulb B. Front position light bulb 26.
  • Page 45 Vespa LX 125 - 150 4T Euro 3 Electrical system Ignition LEGENDA (Con pompa elettrica) 1. Dispositivo di accensione elettronica 2. Antenna immobilizer 8. Fusibili principali 9. Batteria 28. Commutatore a chiave 35. Candela 36. Bobina A.T. ELE SYS - 45...
  • Page 46 Vespa LX 125 - 150 4T Euro 3 Electrical system LEGENDA (Senza pompa elettrica) 1. Dispositivo di accensione elettronica 2. Antenna immobilizer 8. Fusibili principali 9. Batteria 28. Commutatore a chiave 34. Candela 35. Bobina A.T. ELE SYS - 46...
  • Page 47 Vespa LX 125 - 150 4T Euro 3 Electrical system Headlights and automatic starter section LEGENDA (Con pompa elettrica) 1. Dispositivo di accensione elettronica 8. Fusibili principali 9. Batteria 12. Fusibili secondari 18. Deviatore luci 20. Lampada illuminazione targa 22. Fanale posteriore completo 25.
  • Page 48 Vespa LX 125 - 150 4T Euro 3 Electrical system E. Spia luci F. Spia pressione olio G. Spia luci abbaglianti H. Led dissuasione e diagnostica 37. Riscaldatore carburatore 38. Starter automatico LEGENDA (Senza pompa elettrica) 1. Dispositivo di accensione elettronica 8.
  • Page 49 Vespa LX 125 - 150 4T Euro 3 Electrical system A. Spia riserva carburante B. Spia lampeggiatore destro C. Spia lampeggiatore sinistro D. Lampade illuminazione strumento E. Spia luci F. Spia pressione olio G. Spia luci abbaglianti H. Led dissuasione e diagnostica 36.
  • Page 50 Vespa LX 125 - 150 4T Euro 3 Electrical system 12. Fusibili secondari 13. Pulsante di avviamento 14. Pulsante stop sul freno posteriore 15. Pulsante stop sul freno anteriore 22. Fanale posteriore completo 28. Commutatore a chiave LEGENDA (Senza pompa elettrica) 1.
  • Page 51 Vespa LX 125 - 150 4T Euro 3 Electrical system 28. Commutatore a chiave Level indicators and enable signals section KEY(With electric pump) 1. Electronic ignition device 2. Immobilizer aerial 3.TPS potentiometer 8. Main fuses 9. Battery 12. Secondary fuses 28.
  • Page 52 Vespa LX 125 - 150 4T Euro 3 Electrical system G. High-beam warning light H. Immobiliser/diagnosis LED 39. External temperature sensor KEY(Without electric pump) 1. Electronic ignition device 2. Immobilizer aerial 3.TPS potentiometer 8. Main fuses 9. Battery 12. Secondary fuses 28.

  • Page 53: Pin Connector

    Vespa LX 125 - 150 4T Euro 3 Electrical system G. High-beam warning light H. Immobiliser/diagnosis LED 38. External temperature sensor Instruments and warning lights control board 4-PIN CONNECTOR Specification Desc./Quantity Ground lead Left turn indicator warning light Right turn indicator warning light...

  • Page 54: Devices And Accessories

    Vespa LX 125 - 150 4T Euro 3 Electrical system Devices and accessories KEY(With electric pump) 1. Electronic ignition device 6. Ma J2 air valve (150) 8. Main fuses 9. Battery 12. Secondary fuses 16. Horn button 17. Horn 19. Turn signal switch 21.
  • Page 55 Vespa LX 125 - 150 4T Euro 3 Electrical system D. Instrument panel lighting bulbs E. Headlight warning light F. Oil pressure warning light G. High-beam warning light H. Immobiliser/diagnosis LED 32.Turn indicators sound alarm wiring 33. Fuel pump 34.Electric pump control device KEY(Without electric pump) 1.

  • Page 56: Checks And Inspections

    Vespa LX 125 - 150 4T Euro 3 Electrical system 26. Front right turn indicator 28. Key switch 31. Odometer with warning lights and fuel gauge A. Low fuel warning light B. Right turn indicator warning light C. Left turn indicator warning light D.
  • Page 57 Vespa LX 125 - 150 4T Euro 3 Electrical system In case the LED turns off and remains so even when switching over to «ON», check if: - the battery is charged - 15A main fuse is working correctly. Connect the immobilizer tester to the diagnosis socket (see ET4 125 manual) located behind the front left fuse box flap.

  • Page 58: Diagnostic Codes

    Vespa LX 125 - 150 4T Euro 3 Electrical system - Alternately insert all the available black keys and turn each one of them to "ON" for 2 seconds. - Insert the MASTER key again and turn it to "ON"...
  • Page 59 Vespa LX 125 - 150 4T Euro 3 Electrical system 3-FLASH CODE Example with programmed electronic control unit, aerial working properly and unknown transponder code. Ignition disabled-Vehicle immobilised Diagnostic code - 2 flashes When the 2-flash code is detected, carry out the following checks: - Check if the failure continues even after changing key (including the MASTER key).

  • Page 60: Ignition Circuit

    Vespa LX 125 - 150 4T Euro 3 Electrical system Example with programmed control unit, trans- ponder, programmed key and working aerial. The ignition is enabled (regular use conditions) Ignition circuit All the control operations of the system that entail disconnecting cables (to check connections and the devices making up the ignition circuit) must be done with the engine off: if this is not done, the controls might be irretrievably damaged.
  • Page 61 Vespa LX 125 - 150 4T Euro 3 Electrical system - HV primary coil check Disconnect the control unit connector and check that the cable between terminal No. 4 (violet) and terminal No. 12 (black) is not interrupted (see fig- ure).
  • Page 62 Vespa LX 125 - 150 4T Euro 3 Electrical system - Pick-Up Disconnect the control unit connector and connect the positive terminal to connector No. 3 and the negative terminal to connector No. 12 (see figure). Use the start-up system to run the engine and measure the voltage produced by the Pick-Up.

  • Page 63: Stator Check

    Vespa LX 125 - 150 4T Euro 3 Electrical system 020334Y Multiple battery charger Stator check Disconnect the connector from the voltage regu- lator and check there is continuity between any yellow cable and the other two cables. Electric characteristic Ohm value: 0.7 ÷...
  • Page 64 Vespa LX 125 - 150 4T Euro 3 Electrical system Recharge system voltage check Connect an ammeter induction clamp to the volt- age regulator positive terminal, measure the bat- tery voltage and turning on the vehicles lights with engine off, wait for the voltage to set at about 12 V.
  • Page 65 Vespa LX 125 - 150 4T Euro 3 Electrical system Replace the control unit if there is no voltage; oth- erwise, check the wiring connections between the starter and the control unit. Turn signals system check - If the turn indicators do not work, proceed as fol-...
  • Page 66 Vespa LX 125 - 150 4T Euro 3 Electrical system - If voltage is below 12.60 V, a renewal recharge is required as explained in 2). 2) Constant voltage battery charge mode - Constant voltage charge equal to 14.40 to 14.70V - Initial charge voltage equal to 0.3 to 0.5 for Nominal capacity...
  • Page 67 Vespa LX 125 - 150 4T Euro 3 Electrical system 5) Once the above operations have been per- formed, install the battery on the vehicle ensuring that it is wired up properly. 1 Hold the vertical tube 2 Look at the level...

  • Page 68: Pump Supply

    Vespa LX 125 - 150 4T Euro 3 Electrical system 4) Cleaning the battery The battery should always be kept clean, especially on its top side, and the terminals should be coated with Vaseline. WARNING BEFORE RECHARGING THE BATTERY, REMOVE THE PLUGS OF EACH CELL. KEEP SPARKS AND NAKED FLAMES AWAY FROM THE BATTERY WHILE RECHARGING.

  • Page 69: Index Of Topics

    INDEX OF TOPICS ENG VE NGINE FROM VEHICLE...
  • Page 70 Vespa LX 125 - 150 4T Euro 3 Engine from vehicle Exhaust assy. Removal - Remove the 2 fixing nuts from the manifold to the head - Undo the 2 screws fixing the silencer to the hous- ing; then remove the whole muffler paying atten- tion to the interference between its supporting bracket and the cooling cover.
  • Page 71 Vespa LX 125 - 150 4T Euro 3 Engine from vehicle - Remove the throttle control cable from the car- burettor, indicated in the photograph - Remove the fuel supply pipe from the carburettor - Remove the fuel valve low-pressure pipe from the...
  • Page 72 Vespa LX 125 - 150 4T Euro 3 Engine from vehicle - Remove the protection sheath indicated in the figure and disconnect the automatic starter, the carburettor heater and the TPS connectors (150 cm³ version only: disconnect the solenoid valve connector from the MAJ2 control).
  • Page 73 INDEX OF TOPICS NGINE...

  • Page 74: Automatic Transmission

    Vespa LX 125 - 150 4T Euro 3 Engine This section describes the operations to be carried out on the engine and the tools to be used. Automatic transmission Transmission cover - To remove the transmission cover it is necessary to remove the rear plastic cover first by inserting a screwdriver in the corresponding slotted holes.
  • Page 75 Vespa LX 125 - 150 4T Euro 3 Engine Recommended products AGIP GREASE MU3 Yellow-brown, lithium- base, medium-fibre multipurpose grease. ISO L-X-BCHA 3 - DIN 51 825 K3K -20 - Operating the starter lever, load the spring and introduce the pinion in its seat.

  • Page 76: Removing The Driven Pulley Shaft Bearing

    Vespa LX 125 - 150 4T Euro 3 Engine Removing the driven pulley shaft bearing - Remove the clip from the inside of the cover. - Use the specific tools to remove the bearing from the crankcase. CAUTION USE AN APPROPRIATE REST SURFACE TO AVOID DAM- AGING THE COVER PAINT.

  • Page 77: Removing The Driven Pulley

    Vespa LX 125 - 150 4T Euro 3 Engine 020357Y 32 x 35-mm Adaptor 020412Y 15-mm guide Removing the driven pulley - Remove the spacer, the clutch housing and the whole driven pulley unit. N.B. THE UNIT CAN ALSO BE REMOVED WITH THE DRIVING PULLEY MOUNTED.

  • Page 78: Removing The Clutch

    Vespa LX 125 - 150 4T Euro 3 Engine - Using a feeler dial gauge and the magnetic base, measure the bell eccentricity. - Repeat the measurement in 3 positions (Central, internal, external). - If faults are found, replace the bell.

  • Page 79: Specific Tooling

    Vespa LX 125 - 150 4T Euro 3 Engine Inspecting the clutch - Check the thickness of the clutch mass friction material. - The masses must not show traces of lubricants; otherwise, check the driven pulley unit seals. N.B. UPON RUNNING-IN, THE MASSES MUST EXHIBIT A CEN- TRAL FAYING SURFACE AND MUST NOT BE DIFFERENT FROM ONE ANOTHER.
  • Page 80 Vespa LX 125 - 150 4T Euro 3 Engine 020375Y 28 x 30 mm adaptor 020376Y Adaptor handle 020439Y 17-mm guide Inspecting the driven fixed half-pulley - Measure the outside diameter of the pulley bush- ing. Characteristic Minimum diameter permitted Ø...

  • Page 81: Refitting The Driven Pulley

    Vespa LX 125 - 150 4T Euro 3 Engine Refitting the driven half-pulley bearing - Assemble a new roller bearing using the specific punch, fit the bearing with the label facing outward and insert it completely up to the punch on the half- pulley.
  • Page 82 Vespa LX 125 - 150 4T Euro 3 Engine 020263Y Driven pulley assembly sheath Recommended products AGIP GREASE SM 2 Gray black smooth-tex- tured lithium grease, containing molybdenum disulphide. Inspecting the clutch spring - Measure the length of the spring when it is re- laxed.
  • Page 83 Vespa LX 125 - 150 4T Euro 3 Engine - Support the driven pulley spring compressor spe- cific tool with the control screw in vertical axis. - Arrange the tool with the medium length pins screwed in position "C" on the inside.
  • Page 84 Vespa LX 125 - 150 4T Euro 3 Engine 020444Y Tool for fitting/ removing the driven pulley clutch 020444Y011 adapter ring 020444Y009 wrench 46 x 55 Locking torques (N*m) Nut locking clutch unit on pulley 55 - 60 Nm Refitting the driven pulley - Reassemble the clutch housing and spacer.

  • Page 85: Removing The Driving Pulley

    Vespa LX 125 - 150 4T Euro 3 Engine Removing the driving pulley - Lock the driving pulley with the specific tool as shown in the figure. - Disassemble the central nut and the cup washer, remove the drive and the 2 washers.
  • Page 86 Vespa LX 125 - 150 4T Euro 3 Engine - Check the guide shoes for the variator back-plate are not worn. - Check there is no wear in the roller housing, and the surfaces in contact with the belt on either of the pulley halves.
  • Page 87 Vespa LX 125 - 150 4T Euro 3 Engine Refitting the transmission cover - Check that there are 2 alignment dowels and that the sealing gasket for the oil sump on the trans- mission cover is adequately fitted. - Replace the cover and tighten the 10 screws to the specified torque.
  • Page 88 Vespa LX 125 - 150 4T Euro 3 Engine Removing the wheel axle Remove the intermediate gear and the complete hub cover. Removing the hub bearings - Check the state of the bearings being examined (wear, clearance and noisiness). If faults are de- tected, do the following.
  • Page 89 Vespa LX 125 - 150 4T Euro 3 Engine With the appropriate tools, remove the oil seal as shown in the figure. Specific tooling 020376Y Adaptor handle 020359Y 42 x 47-mm Adaptor Removing the driven pulley shaft bearing If it is necessary to remove the driven pulley shaft, from the relevant bearing and oil seal, remove driven pulley.
  • Page 90 Vespa LX 125 - 150 4T Euro 3 Engine Inspecting the hub cover - Check that the fitting surface is not dented or distorted. - Check the load capacity of the bearings and the brake camshaft. - If faults are found, replace the hub cover.
  • Page 91 Vespa LX 125 - 150 4T Euro 3 Engine • Assemble the Seeger ring. • Assemble the oil seal flush with the in- ternal surface as shown in the figure to the hub using the adequate tools and with the seal lip towards the inside of the hub.

  • Page 92: Flywheel Cover

    Vespa LX 125 - 150 4T Euro 3 Engine Refitting the ub cover - Fit a new gasket together with the alignment dowels. - Fit the gearbox cover, making sure the breather pipe is in the correct position. - Screw the 7 screws to the specified torque, po- sitioning the support plate of the pipe in the posi- tion shown in the figure.

  • Page 93: Cooling Fan

    Vespa LX 125 - 150 4T Euro 3 Engine 1.5 mm. Remember that such operation must have performed on a disassembled manifold which must be cleaned afterwards. Cooling fan - Refit the parts in reverse order of the removal operation.
  • Page 94 Vespa LX 125 - 150 4T Euro 3 Engine Refitting the stator - Refit the stator and flywheel carrying out the re- moval procedure in reverse, tightening the retain- ers to the specified torque. - Place the cable harness as shown in the figure.
  • Page 95 Vespa LX 125 - 150 4T Euro 3 Engine Inspecting the flywheel components - Check the integrity of the internal plastic parts of the flywheel and the Pickup control plate. Refitting the flywheel magneto - Fit the flywheel being careful to insert the key properly.
  • Page 96 Vespa LX 125 - 150 4T Euro 3 Engine Removing the timing system drive - Remove the parts listed below first: transmission cover, belt driving pulley, oil pump pulley cover and pinion separator washer. - Remove the tappet cover. - Remove the central screw fastener and the au- tomatic valve lifter retaining cover, as shown in the figure.

  • Page 97: Removing The Cam Shaft

    Vespa LX 125 - 150 4T Euro 3 Engine Removing the cam shaft - Remove the 2 screws and the camshaft retainer shown in the diagram. - Remove the cam shaft. - Remove the pin of the rocking levers from the flywheel side holes.

  • Page 98: Removing The Valves

    Vespa LX 125 - 150 4T Euro 3 Engine Removing the valves - Using the specific tool fitted with the element shown in the figure, remove the cotters, the caps and the spring between the valves. Specific tooling 020382Y Valve cotters equipped with part 012...

  • Page 99: Inspecting The Small End

    Vespa LX 125 - 150 4T Euro 3 Engine Inspecting the small end - Measure the internal diameter of the connecting rod small end using an internal micrometer. N.B. IF THE DIAMETER OF THE CONNECTING ROD SMALL END EXCEEDS THE MAXIMUM DIAMETER ADMISSIBLE, SHOWS SIGNS OF WEAR OR OVERHEATING REPLACE THE CRANKSHAFT AS DESCRIBED IN THE "CRANKCASE...

  • Page 100: Inspecting The Piston

    Vespa LX 125 - 150 4T Euro 3 Engine - Measure the outside diameter of the piston, per- pendicular to the gudgeon pin axis. - Measure 36.5 mm from the piston crown's shown in the figure. N.B. THE PIN HOUSINGS HAVE 2 LUBRICATION CHANNELS.

  • Page 101: Removing The Piston

    Vespa LX 125 - 150 4T Euro 3 Engine STANDARD COUPLING CLEARANCE Name Description Dimensions Initials Quantity Top piston ring 0.025 - 0.070 Middle piston ring 0.015 - 0.060 oil scraper 0.015 - 0.060 MAXIMUM ADMITTED CLEARANCE AFTER USE Name...
  • Page 102 Vespa LX 125 - 150 4T Euro 3 Engine Refitting the piston rings - Place the oil scraper spring on the piston. - Refit the oil scraper ring with the join of spring ends on the opposite side from the ring gap and the word 'TOP' towards the piston crown.

  • Page 103: Inspecting The Cylinder Head

    Vespa LX 125 - 150 4T Euro 3 Engine 020427Y Piston assembly band Inspecting the cylinder head - Using a trued bar check that the cylinder head surface is not worn or distorted. - Check that the camshaft and rocking lever pin bearings show no signs of wear.
  • Page 104 Vespa LX 125 - 150 4T Euro 3 Engine - Remove the central screw and the tensioner spring. Check that the one-way mechanism is not worn. - Check the condition of the tensioner spring. - If examples of wear are found, replace the whole unit.
  • Page 105 Vespa LX 125 - 150 4T Euro 3 Engine - If the width of the impression on the valve seat or the diameter of the valve guide exceed the speci- fied limits, replace the cylinder head. - Check width of the impression on the valve seat «V»...
  • Page 106 Vespa LX 125 - 150 4T Euro 3 Engine 79.6 mm - If no faults are found during the above checks, you can use the same valves. For best sealing re- sults, it is advisable to grind the valves. Grind the valves gently with a fine-grained lapping com- pound.

  • Page 107: Inspecting The Cam Shaft

    Vespa LX 125 - 150 4T Euro 3 Engine Refitting the valves - Lubricate the valve guides with engine oil. - Place the lower caps of the valve spring on the head. - Use the punch to fit the 2 sealing rings one at a time.
  • Page 108 Vespa LX 125 - 150 4T Euro 3 Engine - Check there is no wear on the cam shaft retaining plate and its associated groove on the cam shaft. - If any of the above dimensions are outside the specified limits, or there are signs of excessive wear, replace the defective components with new ones.
  • Page 109 Vespa LX 125 - 150 4T Euro 3 Engine -Screw the nuts and lock them in a crossed sequence and in 2 or 3 stages to the specific torque. Locking torques (N*m) Locking torque 28 to 30 - Fit the two screws on the outside of the timing chain side and tighten them to the specified torque.
  • Page 110 Vespa LX 125 - 150 4T Euro 3 Engine - Refit the spacer on the cam shaft. - Rotate the engine so that the piston is at top dead centre, using the reference marks on the flywheel and the crankcase.
  • Page 111 Vespa LX 125 - 150 4T Euro 3 Engine Locking torques (N*m) Locking torque 11 to 13 - Insert the chain tensioning screw, together with the spring and washer, tightening it to the prescribed torque. Locking torques (N*m) Locking torque 5 to 6 - Adjust the valve clearance.

  • Page 112: Crankcase - Crankshaft

    Vespa LX 125 - 150 4T Euro 3 Engine - Refit the cylinder head cover, tightening the 4 clamping screws to the prescribed torque. - Refit the fan and the housing. - Reassemble the oil pump control, the chain com- partment cover, the by-pass and the oil sump as described in the lubrication chapter.
  • Page 113 Vespa LX 125 - 150 4T Euro 3 Engine 0.15 - 0.40 mm Splitting the crankcase halves Remove the 11 coupling screws to the crankcase. - Separate the crankcase while keeping the crank- shaft in one of the two halves of the crankcase.
  • Page 114 Vespa LX 125 - 150 4T Euro 3 Engine - Check the radial clearance on the connecting rod. -Check the surfaces that limit the axial clearance are not scored and measure the width of the crank- shaft between these surfaces, as shown in the diagram.
  • Page 115 Vespa LX 125 - 150 4T Euro 3 Engine Inspecting the crankshaft alignment To install the crankshaft on the support and to measure the misalignment in the 4 points indicated in figure. - Check that the crankshaft cone, the tab seat, the oil seal capacity, the toothed gear and the threa- ded tangs are in good working order.
  • Page 116 Vespa LX 125 - 150 4T Euro 3 Engine Inspecting the crankcase halves - Before proceeding to check the crankcase halves, thoroughly clean all surfaces and oil ducts. - On the transmission side crankcase half, take particular care cleaning the housing and oil ducts...
  • Page 117 Vespa LX 125 - 150 4T Euro 3 Engine - Check the main bearing seats that limit axial clearance in the crankshaft show no signs of wear. The dimension between these seats is measured by way of the procedure described previously for measuring the crankshaft axial clearance and di- mensions.

  • Page 118: Main Bearings

    Vespa LX 125 - 150 4T Euro 3 Engine - The bushing housings in the crankcase are classified into 2 categories - Cat. 1 and Cat. 2 - just like those for the crankshaft. - The main bushings are subdivided into 3 thickness categories; see the table below: N.B.

  • Page 119: Specific Tooling

    Vespa LX 125 - 150 4T Euro 3 Engine - Lubricate the main bushings and insert the crank- shaft in the transmission side crankcase half. - Reassemble both crankcase halves. - Fit the 11 screws and tighten them to the pre- scribed torque.
  • Page 120 Vespa LX 125 - 150 4T Euro 3 Engine Conceptual diagrams ENG - 120...

  • Page 121: Oil Pressure Check

    Vespa LX 125 - 150 4T Euro 3 Engine Oil pressure check - After removing the cover protections as descri- bed in the "Flywheel" chapter, disconnect the elec- trical connexion of the minimum oil pressure switch and then remove the switch.
  • Page 122 Vespa LX 125 - 150 4T Euro 3 Engine Removal - Remove the transmission cover and the com- plete drive pulley beforehand - Install the base of the appropriate tool on the oil seal using the screws provided. - Screw the threaded bar onto the base of the tool and extract the oil seal.
  • Page 123 Vespa LX 125 - 150 4T Euro 3 Engine - Preassemble the oil seal with the appropriate tool, positioning the screws - Place the sheath over the crankshaft - Insert the tool with the oil seal on the crankshaft until it comes into contact with the crankcase...

  • Page 124: Oil Pump

    Vespa LX 125 - 150 4T Euro 3 Engine - Use the nut to move the base of the tool until you can see end of the oil seal driving stroke - Remove all of the tool components following the procedure in reverse order...
  • Page 125 Vespa LX 125 - 150 4T Euro 3 Engine - Remove the central screw with cup washer, as shown in the diagram. - Remove the chain with the pulley. - Remove the crankshaft control pinion. - Remove the oil pump acting on the 2 retainers as shown in the figure.
  • Page 126 Vespa LX 125 - 150 4T Euro 3 Engine Measure the distance between the outer rotor and the pump body; see figure. Characteristic Admissible limit clearance: 0.20 mm Check the axial clearance of the rotors with a trued bar as reference, as shown in the figure.
  • Page 127 Vespa LX 125 - 150 4T Euro 3 Engine Removing the oil sump - Remove the oil filler plug, the transmission cover, the complete drive pulley assembly with belt and the sprocket wheel, as described in the Transmis- sion chapter.

  • Page 128: Fuel Supply

    Vespa LX 125 - 150 4T Euro 3 Engine Refitting the oil sump - Refit the by-pass piston in its housing. - Insert the pressure-regulating spring. - Fit a new sump seal. - Refit the sump, taking care to locate the spring in the appropriate recess machined into the inside of the sump.
  • Page 129 Vespa LX 125 - 150 4T Euro 3 Engine After having removed the cable harness protec- tion, remove the connector as indicated in the photograph Check the solenoid resistance inside the valve with a multimeter. Electric characteristic Solenoid resistance 35.5 ÷ 40.5 mm at 20°C Apply 12V DC to the connector ends as indicated in the photograph.
  • Page 130 Vespa LX 125 - 150 4T Euro 3 Engine With the multimeter, check if the potentiometer is working correctly by placing the probes on both contactors indicated in the photograph . With throttle valve completely closed, the resist- ance value should be approx. 1.3 kOhm.

  • Page 131: Removing The Carburettor

    Vespa LX 125 - 150 4T Euro 3 Engine - Completely empty the fuel tank. - Remove the petrol delivery pipe and the low- pressure pipe. - Loosen the clip and remove the cock. - Clean the tank and the filter of the cock with a specific solvent.
  • Page 132 Vespa LX 125 - 150 4T Euro 3 Engine - Remove the protection, the bracket and the start- er acting on the screw shown in the figure. - Remove the 2 screws and the starter support with the gasket. - Remove the 4 fixing screws shown in the figure and the vacuum chamber cover.
  • Page 133 Vespa LX 125 - 150 4T Euro 3 Engine - Remove the vacuum valve together with the di- aphragm. - Unscrew the bayonet joint 1/8 of a turn and re- move, take out the spring and vacuum valve nee- - Remove the 4 screws indicated in the figure.
  • Page 134 Vespa LX 125 - 150 4T Euro 3 Engine - Remove the oil pump seal. - Remove the intake and exhaust valves of the in- take pump from the tank N.B. CAUTION, THE ACCELERATION PUMP VALVES ARE MADE UP OF NOZZLES, SPRING AND BALL.
  • Page 135 Vespa LX 125 - 150 4T Euro 3 Engine -Remove diffuser. - Remove the sprayer. N.B. WHEN CLEANING THE CARBURETTOR BODY REMOVE THE SPRAYER TO AVOID LOSING PARTS. IF THE SPRAY- ER IS FORCED IN ITS HOUSING DO NOT ATTEMPT TO REMOVE IT AS THIS WILL ONLY DAMAGE IT.
  • Page 136 Vespa LX 125 - 150 4T Euro 3 Engine -Remove the minimum nozzle. - Remove the minimum flow set screw and the spring. CAUTION DO NOT ATTEMPT REMOVING PARTS EMBEDDED IN THE CARBURETTOR BODY SUCH AS: FUEL SUPPLY PIPE, PLUNGER HOUSING, STARTER NOZZLE, PIT COVER FOR...
  • Page 137 Vespa LX 125 - 150 4T Euro 3 Engine - For maximum circuit, check the air adjustment is correct as shown in the figure. - For the minimum circuit, make sure the following points are properly cleaned: air gauging, exhaust section controlled by flow screw, progression holes near the throttle valve.
  • Page 138 Vespa LX 125 - 150 4T Euro 3 Engine - Wash and blow the minimum nozzle properly and reassemble it. - Properly wash and blow the components of the sprayer maximum circuit, the diffuser and the noz- zle. - Introduce the sprayer in the carburettor body with the shortest cylindrical part directed to the diffuser.
  • Page 139 Vespa LX 125 - 150 4T Euro 3 Engine - Remove the drainage screw from the tank, wash and blow it properly and make sure the accelera- tion pump pipes are clean. - Operate the acceleration pump piston repeatedly and blow with compressed air.
  • Page 140 Vespa LX 125 - 150 4T Euro 3 Engine Level check - Place the carburettor inclined as shown in the figure. - Check that the float reference is parallel to the tank coupling surface - If different positions are detected, change the plunger control metal plate direction to obtain the position described above.
  • Page 141 Vespa LX 125 - 150 4T Euro 3 Engine - Reassemble the spring with the pin lock. - Remove the cover of the vacuum chamber being careful to correctly insert the spring in its place on the cover. - Tighten the screws.
  • Page 142 Vespa LX 125 - 150 4T Euro 3 Engine - Wash and blow dry the starter support. Assemble a new gasket on the carburettor body and tighten the 2 fixing screws. Inspecting the automatic choke device - Check that the automatic starter piston is not de- formed or rusty.

  • Page 143: Adjusting The Idle

    Vespa LX 125 - 150 4T Euro 3 Engine plate with the machined side contacting the starter, tighten the fixing screws. - Position the starter as shown in the figure. - Assemble the protection casing. N.B. TO CARRY OUT THIS CHECK PAY SPECIAL ATTENTION...
  • Page 144 Vespa LX 125 - 150 4T Euro 3 Engine - Using the rpm indicator of the analyser or an in- dependent one (020332y), adjust the idle set screw until 1600 ÷ 1700 rpm is obtained. N.B. THE WASTED SPARK IGNITION SYSTEM OFFERS RE- MARKABLE POWER.

  • Page 145: Index Of Topics

    INDEX OF TOPICS SUSP USPENSIONS...

  • Page 146: Removing The Front Wheel

    Vespa LX 125 - 150 4T Euro 3 Suspensions Front suspension This section is dedicated to operations that can be carried out on the suspensions. Front Removing the front wheel - Remove the five Allen screws that fix the wheel to the hub.
  • Page 147 Vespa LX 125 - 150 4T Euro 3 Suspensions - Remove the oil seal on the roller bearing side using a screwdriver. - Remove the roller bearing using the specific tool Specific tooling 020376Y Adaptor handle 020456Y Ø 24 mm adaptor...

  • Page 148: Refitting The Front Wheel

    Vespa LX 125 - 150 4T Euro 3 Suspensions Refitting the front wheel - When refitting, tighten the 5 screws to the speci- fied torque Locking torques (N*m) Nut tightening torque 20 to 25 N•m Handlebar Removal Remove the handlebar cover before carrying out this operation,.
  • Page 149 Vespa LX 125 - 150 4T Euro 3 Suspensions Removal After removing the upper seat, lean the vehicle on one side and extract the steering tube completely from the fork. Specific tooling 020055Y Wrench for steering tube ring nut Overhaul - Press and remove the wedging washer with the help of a pointed end.
  • Page 150 Vespa LX 125 - 150 4T Euro 3 Suspensions AGIP GREASE PV2 Ivory smooth-textured, slightly-stringy anhydrous calcium-base grease. TL 9150 066, NATO G 460 symbol - Lubricate the sealing rings with mineral oil and half-fill the roller casings with grease.
  • Page 151 Vespa LX 125 - 150 4T Euro 3 Suspensions - After fitting the pin, insert the two spacers, part 17*, slightly hitting with the mallet. * Supplied with the tool Specific tooling 020021Y Front suspension service tool Recommended products AGIP GREASE PV2 Ivory smooth-textured, slightly-stringy anhydrous calcium-base grease.

  • Page 152: Front Shock Absorber

    Vespa LX 125 - 150 4T Euro 3 Suspensions When fitting the fork, lubricate with the steering bearing tracks with the recommended grease. Tighten the lower ring nut "A" and the upper ring nut "B" to the specified torque Recommended products...
  • Page 153 Vespa LX 125 - 150 4T Euro 3 Suspensions Removal - Remove the steering tube - Remove the shock absorber lower clamps - Remove the shock absorber upper clamps Refitting To refit, carry out the removal operations in reverse order, observing the prescribed tightening torques.
  • Page 154 Vespa LX 125 - 150 4T Euro 3 Suspensions - Before refitting the bracket in the wheel axle, place the O-ring as shown in the photograph so that it is correctly placed after fitting the bracket. - Refit the washer and the Seeger ring.
  • Page 155 Vespa LX 125 - 150 4T Euro 3 Suspensions - Suitably hold the brake calliper - shock absorber attachment bracket - Fit a new oil seal and move it until it stops using the specific tool Specific tooling 020376Y Adaptor handle...

  • Page 156: Steering Bearing

    Vespa LX 125 - 150 4T Euro 3 Suspensions TL 9150 066, NATO G 460 symbol Steering bearing Removal - Use the specific tool both to remove the lower seat of the upper bearing and to remove the upper seat of the lower bearing fitted on the chassis.

  • Page 157: Refitting The Rear Wheel

    Vespa LX 125 - 150 4T Euro 3 Suspensions Refitting the rear wheel - Fit the wheel, tighten the nut to the prescribed torque. - Refit the cap and the cotter pin folding it correctly as shown in the figure.

  • Page 158: Shock Absorbers

    Vespa LX 125 - 150 4T Euro 3 Suspensions Refitting For rifting, respect the locking torques Locking torques (N*m) Part C Part B Part A 33 to 41 44 to 52 33 to 41 Shock absorbers SUSP - 158...

  • Page 159: Centre-Stand

    Vespa LX 125 - 150 4T Euro 3 Suspensions Removal - To replace the shock absorber remove the bat- tery access flap to reach and remove the shock absorber/ frame anchoring nut. Then remove the shock absorber/engine anchorage nut. - When refitting, tighten the shock absorber/chas- sis anchoring nut and the shock absorber/engine pin to the prescribed torque.

  • Page 160: Index Of Topics

    INDEX OF TOPICS BRAK SYS RAKING SYSTEM...

  • Page 161: Front Brake Calliper

    Vespa LX 125 - 150 4T Euro 3 Braking system Front brake calliper Removal - Remove the front wheel. - Remove the brake pad retention pin snap ring. - Using a pin partially remove the brake pad re- tention pin.
  • Page 162 Vespa LX 125 - 150 4T Euro 3 Braking system Overhaul - Remove the front brake calliper - Suitably hold the brake calliper in a clamp - Remove the two calliper coupling screws as shown in the photo - Remove the two pistons from the calliper body...
  • Page 163 Vespa LX 125 - 150 4T Euro 3 Braking system Refitting - Insert the brake pads in the calliper. - Insert the pad fixing pin and the retention screw being careful to position the terminals of it pointing towards the bleed screw as shown in the photo.

  • Page 164: Front Brake Disc

    Vespa LX 125 - 150 4T Euro 3 Braking system Front brake disc Removal - Remove the front wheel - Remove the front brake calliper - Remove the hub and the disc operating on the wheel axle nut - Adequately support the hub with the disc and op-...

  • Page 165: Disc Inspection

    Vespa LX 125 - 150 4T Euro 3 Braking system Disc Inspection - Remove the front wheel - Use a micrometer to check the disc thickness as shown in the photograph - Repeat the measurement in at least 6 points on...
  • Page 166 Vespa LX 125 - 150 4T Euro 3 Braking system evenly. A 0.5 mm thickness difference in the re- sidual friction material is permitted Refitting - Insert the brake pads - Insert the fixing pin being careful to position the clip with the ends towards the bleed screw as in the photo.

  • Page 167: Brake Fluid Level Check

    Vespa LX 125 - 150 4T Euro 3 Braking system Front - Remove the rubber cap from the bleed screw. - Insert a rubber pipe in the bleed screw to permit the brake fluid to be recovered. - With the right-hand brake lever, load the system and bring it up to the required pressure.
  • Page 168 Vespa LX 125 - 150 4T Euro 3 Braking system Front brake pump -After removing the front and rear handlebar covers, act on the two stand fixing points (see the figure). - Disconnect the tube, collecting the brake oil in a container.
  • Page 169 Vespa LX 125 - 150 4T Euro 3 Braking system - The plunger shows no sign of damage or abnormal wear; - The piston return spring is in good condition. CAUTION ALL THE SEALS AND GASKETS MUST BE REPLACED EVERY TIME THE PUMP IS SERVICED.

  • Page 170: Rear Drum Brake

    Vespa LX 125 - 150 4T Euro 3 Braking system Rear drum brake Once the silencer and the wheel have been re- moved, follow these steps: 1.Remove the shoe spring using the specific span- ner. 2. Remove the shoe with the aid of a lever.
  • Page 171 INDEX OF TOPICS CHAS HASSIS...

  • Page 172: Instrument Panel

    Vespa LX 125 - 150 4T Euro 3 Chassis Rear handlebar cover Undo the screws as shown in the figure and re- move the handlebar rear section. Instrument panel Operate the 4 screws shown in the figure to re- place the instrument panel.
  • Page 173 Vespa LX 125 - 150 4T Euro 3 Chassis Headlight assy. After removing the front handlebar cover, operate the 4 screws shown in the figure and remove the headlight. Knee-guard - Unscrew the 2 screws shown in the figure placed under the front grille.

  • Page 174: Air Filter

    Vespa LX 125 - 150 4T Euro 3 Chassis Footrest - Operate on the 3 screws shown in the figure once the glove-box and fairing have been removed. Air filter - Remove the helmet compartment. - after removing the side fairing, remove the 2 screws fixing the filter housing to the engine, indi- cated in the figure.

  • Page 175: Front Mudguard

    Vespa LX 125 - 150 4T Euro 3 Chassis Front mudguard - First remove the steering tube and uncouple the front brake pipes from the calliper in order to re- move the front mudguard - Remove the three mudguard-steering tube...
  • Page 176 INDEX OF TOPICS PRE DE DELIVERY...
  • Page 177 Vespa LX 125 - 150 4T Euro 3 Pre-delivery Aesthetic inspection Appearance check: - Paintwork - Fitting of plastics - Scratches - Dirt Tightening torques inspection Lock check - Safety fasteners - Fixing screws Safety fasteners: Rear shock absorber upper fixing...
  • Page 178 Vespa LX 125 - 150 4T Euro 3 Pre-delivery CAUTION TO ENSURE MAXIMUM PERFORMANCE, THE BATTERY MUST BE CHARGED BEFORE USE. INADEQUATE CHARGING OF THE BATTERY WITH A LOW LEVEL OF ELECTROLYTE BEFORE IT IS FIRST USED SHORTENS THE LIFE OF THE BATTERY.

  • Page 179: Static Test

    Vespa LX 125 - 150 4T Euro 3 Pre-delivery Static test Static control after the test ride: - Starting when warm - Starter operation - Minimum hold (turning the handlebar) - Uniform turning of the steering - Possible leaks CAUTION CHECK AND ADJUST TYRE PRESSURE WITH TYRES AT AMBIENT TEMPERATURE.
  • Page 180 Air filter: 174 Battery: 38, 49, 62, 65, 66 Brake: 161, 164, 165, 167, 168, 170 Brake fluid: 167 Carburettor: 11, 131, 136 Checks: 56 Fuel: 37, 128 Headlight: 32, 173 Identification: 8 Instrument panel: 172 Maintenance: 7, 30 Recommended products: Shock absorbers: 158 Spark plug: 60 Start-up:...

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Lx 125 4t euro 3

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