This comprehensive service repair manual provides a detailed guide for maintaining and repairing your Yamaha TZ125 TZ125G1 model, covering years 1990 through 2005. The manual is designed to be user-friendly for both novice and experienced mechanics, offering detailed step-by-step instructions, clear illustrations, and comprehensive diagrams.

The manual features a range of information, including general information on your motorcycle, a comprehensive breakdown of engine mechanical and electrical systems, emission control system details, fuel system specifications, suspension system components, clutch system components, manual and automatic transaxle systems, driveshaft and axle specifications, steering system specifications, brake system components, body interior and exterior specifications, and body electrical system specifications. These sections are further enhanced by detailed wiring diagrams for efficient troubleshooting and electrical service procedures.

With numbered instructions and bold figure numbers, this manual makes it easy to follow each repair procedure. Notes, cautions, and warnings are strategically placed throughout the chapters to highlight critical information, ensuring a safe and successful repair process. The manual also includes a numbered table of contents for quick and convenient access to the information you need.

The Yamaha TZ125, and its later variant the TZ125G1, are legendary racing motorcycles that dominated the 125cc Grand Prix racing scene from 1990 to 2005. These powerful and agile machines were synonymous with speed and precision, captivating audiences with their blistering performance and elegant design. The TZ125, first introduced in 1990, was a technological marvel, featuring an innovative liquid-cooled, two-stroke, single-cylinder engine with a reed valve intake system. This engine produced an impressive power output for its displacement, pushing the limits of two-stroke technology. The TZ125G1, released in 1998, was an evolution of the original design, further enhancing performance with a revised engine and chassis. Both models boasted a lightweight, tubular steel frame, offering exceptional handling and cornering capabilities. These machines were meticulously crafted, with high-quality components and a focus on reducing weight and friction, ensuring optimal performance on the race track.

Beyond their impressive performance, the TZ125 and TZ125G1 were symbols of Yamaha's commitment to racing excellence. These motorcycles became a breeding ground for future Grand Prix champions, contributing to the development of some of the most talented riders in the world. The TZ125's popularity extended beyond the professional racing scene, inspiring a generation of passionate motorcyclists and enthusiasts. Today, these machines remain highly sought-after by collectors and enthusiasts, their iconic status cementing their place in motorcycle history as legendary racing machines that continue to captivate and inspire. The Yamaha TZ125 Workshop Service Repair Manual provides essential information for maintaining and repairing these iconic machines, ensuring they continue to perform at their best, allowing owners and mechanics to experience the thrill of owning and working on a piece of motorsports history.