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Vespa ET4 50 User Manual

Vespa ET4 50
185 pages
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WORKSHOP MANUAL
633367
ET4 50

Table of Contents

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Vespa ET4 50 Specifications

General IconGeneral
Fuel SystemCarburetor
Rear BrakeDrum
Compression Ratio11.5:1
Starting SystemElectric and kick
TransmissionAutomatic
Rear SuspensionSingle shock absorber
IgnitionElectronic

Summary

Vehicle Characteristics

Rules

Safety and maintenance guidelines for proper vehicle operation and repair.

Vehicle Identification

Details on identifying the vehicle's frame and engine prefixes.

Dimensions and Mass

Specifications for the vehicle's physical size and weight.

Engine Specifications

Technical details of the engine, including bore, stroke, and capacity.

Tightening Torques

Steering Assembly Torques

Torque specifications for steering system components.

Frame Assembly Torques

Torque specifications for frame and suspension mounting points.

Front Suspension Torques

Torque specifications for front suspension parts.

Engine Assembly Torques

Torque specifications for engine internal and external parts.

Tooling

General Tooling List

A list of specialized tools for vehicle maintenance and repair.

Specific Tools for Tasks

Tools for specific procedures like crankshaft alignment and flywheel extraction.

Valve and Seal Tools

Tools for valve assembly, disassembly, and seal ring fitting.

Measurement and Testing Tools

Tools for measurement and testing, including multimeter and rev counter.

Maintenance Procedures

Maintenance Chart

Schedule for maintenance tasks at different mileage intervals.

Carburettor and Spark Advance Checks

Detailed procedures for carburettor adjustment and spark advance checks.

Spark Plug Maintenance

Procedures for inspecting and replacing the spark plug.

Hub Oil Replacement

Steps for changing hub oil and recommended products.

Troubleshooting Guide

Engine Performance Issues

Diagnosing and resolving engine performance and starting problems.

Transmission and Brake Problems

Troubleshooting clutch, braking, and overheating issues.

Electrical System Faults

Identifying and fixing issues with the battery and turn signals.

Steering and Suspension Issues

Addressing heavy steering or noisy suspension.

Electrical System

Electrical Equipment Overview

List and diagram of electrical components and their specifications.

Ignition System Components

Diagram and components of the ignition section.

Lights and Starter System Diagrams

Wiring diagrams for headlights, starter, and lighting systems.

Battery Recharge and Starting Checks

Procedures for battery charging and starting system checks.

Engine Removal and Service

Exhaust System Removal

Steps to remove the exhaust assembly from the vehicle.

Engine Removal from Frame

Procedures for disconnecting the engine from the vehicle frame.

Engine Component Service

Automatic Transmission Service

Procedures for transmission cover and kickstart removal.

Driven Pulley Shaft Bearing Service

Steps for removing and refitting the driven pulley shaft bearing.

Clutch Inspection and Removal

Inspecting the clutch drum and removing the clutch assembly.

Piston Rings and Cylinder Inspection

Inspecting piston rings and cylinder for wear and dimensions.

Suspensions System

Front Wheel Hub Service

Steps to remove and overhaul the front wheel hub and bearings.

Handlebar Component Service

Procedures for removing and refitting handlebar components.

Front Fork Removal

Steps to remove the steering tube from the front fork.

Steering Column Bearing Service

Procedures for removing and refitting steering column bearings.

Braking System

Front Brake Calliper Service

Procedures for removing, overhauling, and refitting the front brake calliper.

Front Brake Disc Service

Steps for replacing and inspecting the front brake disc.

Front Brake Pump Service

Procedures for removing and refitting the front brake pump.

Rear Drum Brake Service

Steps for removing and refitting rear brake shoes.

Chassis Components

Rear Rack Removal

Steps to remove the rear rack and its plastic components.

Instrument Panel Service

Procedures for removing and replacing the instrument panel.

Front Handlebar Cover Service

Steps to remove the front handlebar fairing and handlebars.

Legshield and Footrest Replacement

Procedures for replacing the legshield grille and footrests.

Pre-delivery Checks

Aesthetic Inspection

Checks for paintwork, fairing joints, damage, and cleanliness.

Tightening Torques Verification

Verification of tightening torques for various fastenings.

Electrical System Checks

Verifying voltage and functionality of electrical devices.

Fluid Levels and Road Test

Checks for fluid levels, road test procedures, and functional inspections.

Engine Component Times

Engine Removal and Refitting

Procedure for removing and refitting the engine from the frame.

Engine Complete Service

General service procedures for the entire engine.

Engine Oil Change

Procedure for changing the engine oil.

Engine Retainer Nut Tightening

Procedure for tightening engine retainer nuts.

Crankcase and Crankshaft Service

Engine Crankcase Replacement

Procedure for replacing the engine crankcase.

Crankshaft Replacement

Procedure for replacing the crankshaft.

Oil Seal and Main Bearings Replacement

Procedures for replacing oil seals and main bearings.

Cylinder and Head Service

Cylinder Piston Assembly Replacement

Procedure for replacing the cylinder and piston assembly.

Head Gasket and Valve Service

Procedures for changing head gasket and replacing/adjusting valves.

Camshaft and Rocking Lever Service

Procedures for replacing camshaft and rocking levers.

Head/Cylinder Nut Tightening

Torque specifications for tightening head-cylinder nuts.

Cylinder Head Cover Service

Spark Plug and Cooling Hood Replacement

Procedures for replacing spark plug and cooling hood.

Head Cover Replacement

Procedure for replacing the cylinder head cover.

Driven Pulley and Clutch Service

Driven Pulley Replacement and Overhaul

Procedures for replacing and overhauling the driven pulley.

Clutch and Reduction Gearing Service

Procedures for replacing clutch, reduction gearing cover, and bell housing.

Oil Pump Service

Belt/Timing Chain and Oil Pump Service

Procedures for changing belt/timing chain and oil pump.

Chain Guide Pads and Tightener Service

Procedures for changing chain guide pads and overhauling tightener.

Reduction Gear Service

Gear Reduction Unit Inspection

Inspection of the gear reduction unit.

Rear Wheel Axle Replacement

Procedure for replacing the rear wheel axle.

Driving Pulley Service

Driving Pulley Overhaul

Procedures for overhauling the driving pulley.

Driving Half-Pulley and Pulley Replacement

Procedures for replacing driving half-pulley and pulley.

Transmission Cover Service

Transmission Crankcase Cover Replacement

Procedure for replacing the transmission crankcase cover.

Air Intake Pipe and Cover Bearing Replacement

Procedures for replacing air intake pipe and cover bearing.

Starter Motor and Lever Service

Starter Motor and Sprocket Wheel Replacement

Procedures for replacing starter motor and sprocket wheel.

Starter Lever and Kick Starter Inspection

Procedures for replacing starter lever and inspecting kick starter.

Flywheel Fan Service

Stator Fitting and Refitting

Procedures for fitting and refitting the stator.

Flywheel and Cooling Fan Replacement

Procedures for replacing flywheel and cooling fan.

Net Oil Filter and Flywheel Cover Service

Procedures for changing oil filter and replacing flywheel cover.

Fuel Tank Service

Fuel Tank and Hose Replacement

Procedures for replacing fuel tank and fuel hose.

Fuel Valve and Breather Replacement

Procedures for replacing fuel valve and tank breather.

Muffler and Exhaust Pipe Service

Muffler Replacement

Procedure for replacing the muffler.

Muffler Guard Replacement

Procedure for replacing the muffler guard.

Air Filter Service

Air Filter Replacement and Cleaning

Procedures for replacing and cleaning the air filter.

Air Filter Box Replacement

Procedure for replacing the air filter box.

Frame Service

Frame Replacement

Procedure for replacing the main frame.

Rear Fairings Removal and Refitting

Procedures for removing and refitting rear fairings.

Spark Plug Flap and Frame Painting

Procedures for replacing spark plug flap and painting the frame.

Stand Service

Stand and Stand Bolt Replacement

Procedures for replacing the center stand and stand bolt.

Swinging Arm Connection Replacement

Procedure for replacing the engine-chassis connection.

Glove Compartment Service

Glove Box Door and Compartment Replacement

Procedures for replacing the glove box door and compartment.

Number Plate Holder and Mudguards

Number Plate Holder and Light Service

Procedures for replacing license plate holder and light components.

Mudguard Replacement

Procedures for replacing front and rear mudguards.

Front Shock Absorber Service

Front Shock Absorber Removal and Refitting

Procedures for removing and refitting the front shock absorber.

Shock Absorber Cover Replacement

Procedure for replacing the shock absorber cover.

Rear Shock Absorber and Steering Bearings

Rear Shock Absorber Removal and Refitting

Procedures for removing and refitting the rear shock absorber.

Steering Column Bearing Service

Procedures for replacing steering fifth wheel and adjusting clearance.

Handlebar Cover Service

Handlebar Section and Odometer Replacement

Procedures for replacing handlebar sections and odometer.

Instrument Panel Warning Light Bulb Replacement

Procedure for replacing instrument panel warning light bulbs.

Handlebar Components Service

Brake/Clutch Lever and Hand Grip Replacement

Procedures for replacing brake/clutch levers and hand grips.

Handlebar Removal and Refitting

Procedures for removing and refitting the handlebar.

Driving Mirror and Left Control Replacement

Procedures for replacing driving mirror and left handlebar control.

Saddle and Associated Parts

Handlebar Components (Continued)

Right grip, brake fluid, handlebar controls, and throttle transmission replacement.

Saddle and Luggage Rack Replacement

Procedures for replacing the saddle and luggage rack.

Lighting System

Rear Red Lamp Service

Procedures for replacing rear light bulbs and components.

Front Wheel Service

Procedures for replacing front tyre, rim, and checking pressure.

Wheel and Tyre Service

Grease Tone Wheel or Drive

Instructions for greasing the tone wheel and drive components.

Rear Wheel Service

Procedures for replacing the rear wheel, tyre, and rim.

Headlight and Electrical Devices

Headlight Bulb and Unit Replacement

Procedures for replacing headlight bulbs and the headlight unit.

Front Turn Indicator Service

Procedures for replacing front turn indicators and bulbs.

Electrical Devices Overview

Procedures for replacing HV coil, spark plug cap, and voltage regulator.

Control Unit and Choke Device Replacement

Procedures for replacing control unit and choke control device.

Electric Devices and Switches

Horn and Light Switch Replacement

Procedures for replacing horn and light switches.

Button and Lock Replacements

Procedures for replacing horn button, starter button, and locks.

Battery and Fuse Service

Battery and Remote Control Switch Replacement

Procedures for replacing battery and remote control switch.

Fuse Terminal Block and Battery Fuse Replacement

Procedures for replacing fuse terminal block and battery fuse.

Transmission System

Odometer and Rear Brake Cable Service

Procedures for replacing odometer and rear brake cables.

Rear Brake Transmission and Adjustment

Procedures for replacing rear brake transmission and adjusting cable.

Front Brake Piping Replacement

Procedure for replacing front brake piping.

Brake Caliper Service

Shock Absorber Support and Caliper Replacement

Procedures for replacing shock absorber support and brake caliper.

Front Brake Caliper Removal and Refitting

Procedures for removing and refitting the front brake caliper.

Odometer Sensor and Brake Pad Service

Procedures for replacing odometer sensor and servicing brake pads.

Footrest and Mat Service

Footrest Removal and Refitting

Procedures for removing and refitting the footrest.

Footboard Rubber Cover and Front Mat Replacement

Procedures for replacing footboard rubber covers and front mat.

Steering System Service

Steering Tube Replacement

Procedure for replacing the steering tube.

Front Suspension and Brake Disc Service

Service procedures for front suspension and brake disc replacement.

Wheel Bearings and Hub Service

Procedures for replacing front wheel bearings and hub.

Helmet Carrier Service

Helmet Compartment and Battery Compartment Service

Procedures for removing/refitting helmet and battery compartments.

Battery Cover and Air Cleaner Union Service

Procedures for replacing battery cover and air cleaner union.

Brake Lever Service

Rear Brake Pads Replacement

Procedure for replacing rear brake pads.

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