This comprehensive service repair manual for the Aprilia RS125 motorcycle, covering model years 1999 to 2003, provides detailed instructions and illustrations to guide you through a wide range of repair and maintenance procedures. Similar to factory shop manuals, this resource equips you with the knowledge and tools to tackle repairs of varying complexity, from basic maintenance to intricate engine work.

The manual covers all aspects of the Aprilia RS125, encompassing general information, specifications, regular maintenance schedules, and in-depth breakdowns of various systems. You'll find step-by-step guidance on gearbox and clutch operations, engine removal and installation, fuel system intricacies, lubrication and cooling systems, engine combustion, and detailed explanations of the cylinder head, valves, alternator, starter clutch, crankshaft, transmission, and balancer systems.

Furthermore, the manual provides comprehensive coverage of the front and rear wheel systems, fenders, exhaust pipe, periodic checks and adjustments, chassis, cooling system, fuel injection system, braking system, suspension, electrical system, body and fixtures, frame and body panels, wheels and tires, battery and charging system, ignition system, electric starter, lights, meters, switches, and wiring diagrams. To aid your troubleshooting efforts, the manual includes technical information, specifications, and a troubleshooting guide. A comprehensive index ensures quick and easy access to the information you need.

With clear instructions, detailed exploded diagrams, and comprehensive coverage, this manual empowers you to perform repairs with confidence, saving you time and money on professional repair services. This valuable resource is a must-have for any RS125 owner seeking to maintain their motorcycle and perform repairs efficiently.

## The Aprilia RS125: A Legacy of Performance and Style

The Aprilia RS125, produced between 1999 and 2003, is a legendary sportbike that solidified Aprilia’s reputation for building high-performance, lightweight machines. This motorcycle, aimed at young riders eager to enter the world of track racing, quickly became a favorite amongst enthusiasts for its blistering acceleration, agile handling, and striking aesthetics. The RS125 inherited the iconic "Tuono" design language, boasting a sharp, aggressive profile that was instantly recognizable on the racetrack. Its sleek fairing, sculpted fuel tank, and low-slung riding position exude a sense of speed and agility. Coupled with its vibrant color schemes, the RS125 became a head-turning presence on the road and a formidable competitor on the track.

Underneath the stylish exterior, the RS125 housed a potent 125cc single-cylinder, liquid-cooled, two-stroke engine. This powerplant, known for its screaming revs and exhilarating responsiveness, was capable of generating substantial power for its size. The engine was paired with a six-speed gearbox, allowing riders to extract the maximum performance from the engine across the rev range. The chassis, built around a rigid steel frame, was designed for precise handling and confidence-inspiring stability. The suspension, featuring a telescopic fork upfront and a monoshock at the rear, provided a balance between sporty performance and a comfortable ride. With its lightweight design, powerful engine, and exceptional handling, the Aprilia RS125 offered a thrilling riding experience that quickly captured the hearts of countless enthusiasts.