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Vespa LX 150 4T USA User Manual

Vespa LX 150 4T USA
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WORKSHOP MANUAL
633572
LX 150 4T USA

Table of Contents

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Vespa LX 150 4T USA Specifications

General IconGeneral
CategoryScooter
Displacement150 cc
Compression Ratio10.5:1
Fuel SystemElectronic Fuel Injection
Cooling SystemAir-cooled
TransmissionAutomatic CVT
Front SuspensionSingle arm with helical spring and hydraulic shock absorber
Front Tire110/70-11
Rear Tire120/70-10
Weight114 kg (251 lbs)
Year2014
IgnitionElectronic
Engine Type4-stroke, single-cylinder
Max Torque10.7 Nm @ 6, 500 rpm
Rear SuspensionDual shock absorbers
Front Brake200 mm hydraulic disc
Rear BrakeDrum brake
Seat Height31.1 inches
Wheelbase52.8 inches
Length1, 770 mm (69.7 inches)

Summary

Workshop Manual

Rules

General safety rules for maintenance operations.

Characteristics

Vehicle Identification

Details on chassis and engine prefixes.

Dimensions and Mass

Specifications for weight, height, width, wheelbase, and length.

Engine

Technical specifications of the engine, including bore, stroke, and power output.

Transmission

Description of the automatic variator and belt drive system.

Capacities

Fluid capacities for engine oil, rear hub oil, and fuel tank.

Electrical System

Specifications for the starting system and spark plug type.

Frame and Suspensions

Description of chassis construction and suspension system.

Brakes

Specifications for front and rear brake systems.

Wheels and Tyres

Details on wheel rims, tyre sizes, and recommended pressures.

Secondary Air

System for reducing polluting emissions via catalytic converter.

Carburettor

Settings and specifications for the Keihin carburettor.

Tightening Torques

Torque values for various lubrication and engine components.

Crankcase and Crankshaft

Torque specifications for crankcase, steering, frame, and suspension parts.

Cylinder - Piston Assy.

Specifications for piston-cylinder coupling and piston ring dimensions.

Slot Packing System

Procedure for determining cylinder base gasket thickness for compression ratio.

Tooling

Tools

List of specialized tools with store codes and descriptions for various tasks.

Tooling

Additional specialized tools for engine and chassis maintenance.

Electrical Tools

Electrical diagnostic and charging tools.

Measurement and Alignment Tools

Measurement and alignment tools for engine components.

Assembly Adapters

Adapters and specialized tools for specific component servicing.

Engine Assembly Tools

Tools for piston, cylinder, and pulley assembly.

Engine Component Tools

Tools for engine component assembly and testing procedures.

Engine and Exhaust Tools

Specialized tools for engine and exhaust system maintenance.

Maintenance

Maintenance Chart

Schedule of regular maintenance tasks based on mileage and time.

Checking the Spark Advance

Procedure and specifications for verifying ignition timing advance.

Braking System Level Check

Level check for the hydraulic brake fluid reservoir.

Headlight Adjustment

Steps for correctly adjusting the headlight beam alignment.

CO Check

Procedure for checking and adjusting exhaust CO emissions.

SAS Filters Inspection and Cleaning

Maintenance of the secondary air system filters.

Anti-evaporation System

Diagram and components of the fuel vapor emission control system.

Canister Inspection

Checks for proper functioning of the fuel vapor canister.

Safety Valve Check

Verifying the operation of the safety valve in the anti-evaporation system.

Roll-over Valve Check

Testing the functionality of the roll-over valve in the fuel tank system.

Troubleshooting

Engine - Poor Performance

Common causes and troubleshooting steps for poor engine operation.

Starting Difficulties

Solutions for issues preventing the engine from starting.

Excessive Oil Consumption/Exhaust Smoke

Diagnosing causes for increased oil usage and smoky exhaust.

Insufficient Lubrication Pressure

Troubleshooting steps for low oil pressure conditions.

Engine Tends to Cut-off at Full Throttle

Addressing engine stalling issues at high engine speeds.

High Fuel Consumption

Identifying and resolving causes of excessive fuel usage.

Insufficient Braking

Diagnosing and fixing problems with brake performance.

Electrical System - Battery

Troubleshooting common battery-related problems.

Turn Signal Lights Malfunction

Diagnosing and resolving issues with turn signal lights.

Steering and Suspensions - Heavy Steering

Identifying and fixing causes of stiff or heavy steering.

Excessive Steering Play

Addressing and correcting excessive looseness in the steering system.

Noisy Suspension

Troubleshooting and identifying sources of suspension noise.

Electrical System

Legend

Explanation of symbols used in the electrical diagrams.

Wire Colour Coding

Key for identifying wire colors in electrical schematics.

Ignition

Diagram and components of the ignition system.

Headlights and Automatic Starter Section

Wiring for headlights and automatic starter systems.

Battery Recharge and Starting

Diagrams for battery charging and engine starting circuits.

Level Indicators and Enable Signals Section

Wiring for dashboard indicators and warning lights.

Turn Signal Lights

Wiring diagrams for turn signals and horn systems.

Immobiliser

Description and function of the anti-theft immobilizer system.

Diagnostic Codes

Interpretation of fault codes indicated by the system's LED.

No Spark Plug

Troubleshooting steps for ignition system faults leading to no spark.

Battery Recharge Circuit

Explanation of the alternator-based battery charging system.

Stator Check

Testing the stator for continuity and insulation resistance.

Voltage Regulator Check

Verifying the output voltage of the voltage regulator.

Dry-charge Battery

Warnings and procedures for handling dry-charge batteries.

Commissioning Dry-charged Batteries

Steps for preparing and charging new dry-charge batteries before use.

Battery Maintenance

Rules for checking electrolyte level and load status of the battery.

Engine from Vehicle

Exhaust Assy. Removal

Steps for detaching the exhaust system assembly.

Removal of the Engine from the Vehicle

Comprehensive procedure for safely removing the engine from the scooter frame.

Engine

Automatic Transmission

Procedures for removing and servicing the transmission cover and related parts.

Kickstart

Inspection and replacement of kickstart mechanism components.

Air Duct

Steps for removing and refitting the air manifold and filter assembly.

Removing the Driven Pulley Shaft Bearing

Procedure for extracting the bearing from the driven pulley shaft.

Inspecting the Clutch Drum

Checking the clutch drum for wear and measuring its internal diameter.

Removing the Clutch

Detailed steps for disassembling the clutch assembly.

Removing the Driven Half-Pulley Bearing

Procedure for extracting the bearing from the driven half-pulley.

Refitting the Driven Pulley

Steps for reassembling the driven pulley unit with new seals.

Removing the Driving Pulley

Procedure for detaching the driving pulley from the crankshaft.

Refitting the Driving Pulley

Steps for reassembling the driving pulley assembly.

End Gear - Removing the Hub Cover

Steps for removing the rear hub cover and its components.

Removing the Hub Bearings

Procedure for extracting the hub bearings.

Removing the Timing System Drive

Detailed procedure for removing timing system drive components.

Removing the Cam Shaft

Steps for removing the camshaft assembly.

Removing the Cylinder Head

Procedure for detaching the cylinder head from the engine block.

Removing the Cylinder - Piston Assy.

Procedure for removing the cylinder and piston assembly.

Refitting the Piston Rings

Procedure for correctly positioning and installing piston rings.

Inspecting the Cylinder Head

Checking cylinder head surface for flatness and wear.

Refitting the Valves

Lubricating and installing valve components, including springs and seals.

Crankcase - Crankshaft

Precautionary removal of components before opening the crankcase.

Splitting the Crankcase Halves

Procedure for safely separating the crankcase halves.

Inspecting the Crankshaft Alignment

Measuring crankshaft misalignment using a support and dial gauge.

Inspecting the Crankcase Halves

Cleaning and inspecting crankcase mating surfaces and oil ducts for damage.

Refitting the Crankcase Halves

Steps for refitting the crankcase halves with new gaskets.

Suspensions

Front Wheel Hub Overhaul

Procedure for disassembling and servicing the front wheel hub bearings and seals.

Refitting the Front Wheel

Steps for reassembling the front wheel onto the hub.

Handlebar

Procedures for removing and refitting the handlebar assembly.

Steering Column

Removal and overhaul of the steering column and its bearings.

Rear Wheel

Steps for detaching and reassembling the rear wheel.

Swing-arm

Removal and refitting procedures for the swing arm assembly.

Shock Absorbers

Removal and refitting procedures for front and rear shock absorbers.

Removal

Steps to remove the front shock absorber from the chassis.

Braking System

Front Brake Calliper

Removal and overhaul procedures for the front brake calliper.

Front Brake Disc

Removal and refitting steps for the front brake disc.

Disc Inspection

Checking the thickness and runout of the brake disc.

Front Brake Pads

Removal and refitting procedures for the front brake pads.

Front Brake Pump

Removal and overhaul procedures for the front brake pump assembly.

Overhaul

Disassembly and inspection of brake pump components like pistons and diaphragm.

Rear Drum Brake

Steps for replacing brake shoes in the rear drum brake system.

Chassis

Rear Handlebar Cover

Procedure to remove the rear section of the handlebar cover.

Instrument Panel

Steps to remove and replace the instrument panel assembly.

Front Handlebar Cover

Procedure to remove the front section of the handlebar cover.

Headlight Assy.

Steps for removing and replacing the headlight assembly.

Knee-Guard

Procedure for removing the knee-guard located under the front grille.

Air Filter

Steps for removing the air filter box and the air filter element.

Front Mudguard

Procedure for removing the front mudguard.

Pre-delivery

Aesthetic Inspection

Checks for paintwork, plastic fitting, scratches, and dirt.

Tightening Torques Inspection

Verification of crucial torque settings on various components.

Safety Locks

Inspection of safety lock mechanisms for proper function.

Electrical System Checks

Checks for all electrical system components and their operation.

Levels Check

Verification of hydraulic fluid, hub oil, and engine oil levels.

Road Test

Procedures for conducting a test ride to verify vehicle operation.

Static Test

Static checks performed after the road test to confirm system functionality.

Functional Inspection

Comprehensive check of braking, clutch, engine, and other systems.

Time

Engine

Codes and durations for engine removal and refitting procedures.

Crankcase

Codes and durations for crankcase and half-crankcase gasket replacement.

Crankshaft

Codes and durations for crankshaft and flywheel side oil seal replacement.

Cylinder Assy.

Codes and durations for cylinder-piston group replacement and inspection.

Cylinder Head Assy.

Codes and durations for valve, head gasket, and cylinder head replacement.

Rocker Arms Support Assy.

Codes and durations for camshaft, rocking lever, and valve adjustments.

Chain Tensioner

Codes and durations for chain tensioner service and bypass lubrication.

Oil Filter

Codes and durations for oil filter, sensor, and engine oil change.

Flywheel Cover

Codes and durations for flywheel cover and air system components.

Driven Pulley

Codes and durations for driven pulley and clutch component service.

Oil Pump

Codes and durations for oil pump service and replacement.

Final Gear Assy.

Codes and durations for rear axle, gear cover, and gear reduction unit service.

Driving Pulley

Codes and durations for driving pulley, variator rollers, and belt replacement.

Transmission Cover

Codes and durations for transmission cover and bearing replacement.

Starter Motor

Codes and durations for starter motor and related electrical components.

Flywheel Magneto

Codes and durations for cooling fan, stator, and flywheel replacement.

Belt Cooling Duct

Codes and durations for air manifold and pipe replacement.

Carburettor

Codes and durations for carburettor service and replacement.

Exhaust Pipe

Codes and durations for muffler and exhaust emissions adjustment.

Air Cleaner

Codes and durations for air cleaner fitting, filter, and box replacement.

Frame

Codes and durations for chassis and body panel replacement.

Centre-stand

Codes and durations for stand bolt and stand replacement.

Footrests

Codes and durations for footrest and rubber replacement.

Rear Cover

Codes and durations for rear shield, glove box, and trunk gasket replacement.

Underseat Compartment

Codes and durations for battery cover and helmet compartment removal.

Helmet Compartment

Codes and durations for helmet compartment and battery cover replacement.

Plate Holder

Codes and durations for license plate holder components.

Mudguard

Codes and durations for front and rear mudguard replacement.

Fuel Tank

Codes and durations for fuel tank and related components replacement.

Rear Shock-Absorber

Codes and durations for rear shock absorber removal and refitting.

Steering Column Bearings

Codes and durations for steering fifth wheel and bearing replacement.

Handlebar Covers

Codes and durations for handlebar cover and odometer replacement.

Handlebar Components

Codes and durations for handlebar components like mirrors, grips, and levers.

Swing-Arm

Codes and durations for swing arm connection replacement.

Seat

Codes and durations for saddle and luggage rack support replacement.

Turn Signal Lights

Codes and durations for replacing front and rear turn signals and bulbs.

Front Wheel

Codes and durations for front wheel, tyre, rim, hub, disc, and bearing replacement.

Rear Wheel

Codes and durations for rear wheel, tyre, rim, and brake pads/shoes replacement.

Electric Devices

Codes and durations for electrical components like starter, regulator, battery, and control unit replacement.

Electronic Controls

Codes and durations for switches, buttons, and locks replacement.

Transmissions

Codes and durations for brake transmission and odometer replacement.

Front Suspension

Codes and durations for steering tube, suspension, calliper support, and odometer reel replacement.

Braking System

Codes and durations for brake hoses, pads, calliper, and fluid system replacement.

Secondary Air Box

Codes and durations for secondary air system components replacement.

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