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APRILIA RS4 125 User Manual

APRILIA RS4 125
298 pages
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SERVICE STATION MANUAL
B043126
RS4 125

Table of Contents

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APRILIA RS4 125 Specifications

General IconGeneral
Engine TypeSingle-cylinder, 4-stroke
Displacement124.8 cc
Cooling SystemLiquid cooled
Fuel SystemElectronic fuel injection
Transmission6-speed
Torque10.9 Nm @ 8, 250 rpm
Front Tire100/80-17
Rear Tire130/70-17
Seat Height820 mm
Fuel Tank Capacity14.5 liters
Bore x Stroke58 mm x 47 mm
Power15 HP (11 kW) at 10, 000 rpm
FrameAluminum perimeter frame
Front Brake300 mm disc, 4-piston caliper
Front Suspension41mm upside-down fork
Rear SuspensionMonoshock

Summary

Characteristics

General Safety and Handling Guidelines

Essential safety rules for working with fuel, hot components, coolant, and hazardous materials.

Component Removal, Reassembly, and Electrical Connectors

Procedures for dismantling, reassembling parts, and handling electrical connectors safely.

Maintenance

Scheduled Maintenance Table

Schedule of recommended maintenance tasks and their intervals.

Routine Service Procedures

Maintenance for spark plug, engine oil, air filter, coolant, and brake fluid.

Electrical System

Power and Charging System Checks

Procedures for checking battery, alternator, voltage regulator, and starter system.

Control Unit and Troubleshooting

Wiring diagrams, ECU connector key, and troubleshooting for electrical errors.

Engine From Vehicle

Vehicle Preparation for Engine Removal

Steps to prepare the vehicle, drain fluids, and remove surrounding components.

Engine Removal and Installation Procedures

Detailed steps for removing and installing the engine, including disconnecting cables and screws.

Engine

Gearbox and Shafts

Disassembly, checking, and assembly of the gearbox shafts and components.

Starter Motor, Flywheel, and Clutch

Procedures for starter motor, flywheel, and clutch assembly/disassembly.

Crankcase, Shafts, and Bearings

Procedures for crankcase opening, bearing removal, and crankshaft checks.

Cylinder, Piston, and Valves

Steps for removing, checking, and fitting the cylinder, piston, valves, and camshafts.

Lubrication System (Oil Pump)

Procedures for removing, inspecting, and installing the oil pump.

Suspensions

Front Wheel Removal and Checking

Procedures for removing, checking, and installing the front wheel and its components.

Fork Disassembly and Reassembly

Steps for disassembling and reassembling Paioli and Mingxing forks.

Rear Wheel Removal and Checking

Procedure for removing and checking the rear wheel, flexible coupling, and sprocket.

Braking System

Braking System Bleeding

Detailed procedure for bleeding air from the front and rear hydraulic brake circuits.

Pre-Delivery

Road and Static Tests

Procedures for road tests, static checks after test drive, and functional inspections.

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