This comprehensive workshop service repair manual for the Aprilia RS4 125, covering model years 2011, 2012, and 2013, is your essential guide for performing repairs and maintenance on your motorcycle. Containing 372 pages of detailed information, it provides step-by-step procedures, explanations, and pictorial diagrams for all aspects of your Aprilia RS4 125. From basic maintenance tasks to complex repairs, this manual covers everything you need to know. It includes detailed instructions for: * **Engine:** Disassembly, reassembly, adjustments, troubleshooting, and repair of all engine components, including the cylinder head, crankshaft, valves, and camshafts. * **Transmission:** Removal, installation, adjustment, and repair of the gearbox, clutch, and other transmission components. * **Electrical System:** Diagnosis, troubleshooting, and repair of the electrical system, including wiring diagrams, component locations, and specifications. * **Brakes:** Detailed instructions for servicing and repairing the front and rear brakes, including caliper disassembly, pad replacement, and rotor inspection. * **Suspension:** Information on disassembling, inspecting, and reassembling the front forks and rear shock absorbers, including detailed adjustments for optimal performance. * **Fuel System:** Comprehensive coverage of the fuel injection system, including troubleshooting fuel delivery issues, injector cleaning, and fuel pump replacement. * **Bodywork:** Instructions for removing, installing, and repairing the body panels, including instructions for adjusting and replacing fasteners. The manual is written in clear and concise language, making it easy to understand and follow. It features numerous illustrations, exploded diagrams, drawings, and photos, providing visual aids to help you complete each repair task. Detailed information on adjustment procedures, including factory specifications and wear limits, ensures you can restore your motorcycle to its optimal performance. Whether you're a seasoned mechanic or a DIY enthusiast, this manual is an invaluable resource for keeping your Aprilia RS4 125 running smoothly and efficiently.

The Aprilia RS4 125, a sportbike produced from 2011 to 2013, is a testament to Aprilia's commitment to delivering high-performance motorcycles for young riders. This machine is a perfect entry point into the world of sportbikes, boasting a lightweight and agile chassis paired with a potent 125cc liquid-cooled, single-cylinder engine. The RS4 125 is renowned for its sharp handling and responsive acceleration, making it a blast to ride on winding roads and twisty tracks. The bike's styling is unmistakably Aprilia, featuring aggressive lines, a low-slung profile, and a sculpted fairing that channels air efficiently for optimal aerodynamic performance. The RS4 125 also boasts a comfortable riding position, with clip-on handlebars that provide a sporty but not overly aggressive riding posture. Its lightweight design contributes to its agility and maneuverability, making it easy to throw around corners and effortlessly navigate tight spaces. Beyond its performance and aesthetic appeal, the Aprilia RS4 125 is also a practical choice for new riders. Its relatively low seat height makes it accessible for riders of varying heights, and its approachable power delivery allows riders to build confidence and develop their skills. The RS4 125 is also relatively inexpensive to maintain, and spare parts are readily available. This makes it a sensible option for riders who are looking for a fun and exciting motorcycle without breaking the bank. Overall, the Aprilia RS4 125 is a compelling motorcycle that offers a blend of performance, practicality, and style. It is an excellent choice for riders who are looking for a fun, affordable, and accessible sportbike that will provide years of enjoyment.