This comprehensive repair manual provides detailed instructions and technical specifications for the 1990-1991 Kawasaki KDX125 and KDX250 2-stroke motorcycles. It covers a wide range of topics, including:

**General Information:** This section introduces the manual and provides essential information about the motorcycle, such as safety precautions and proper tool usage.

**Routine Maintenance:** This section outlines all necessary maintenance procedures for keeping your motorcycle in peak condition, including oil changes, air filter cleaning, and spark plug replacement.

**Engine Removal and Installation:** This section details the step-by-step process for removing and reinstalling the engine, covering everything from disconnecting the necessary components to properly torquing the bolts.

**Fuel System:** This section covers the fuel system in-depth, including the fuel tank, carburetor, fuel lines, and fuel pump. It provides troubleshooting tips and detailed instructions on repairing and maintaining these critical components.

**Lubrication and Cooling System:** This section covers the motorcycle's lubrication and cooling systems, including the oil pump, cooling system components, and proper fluid levels.

**Engine Specifications:** This section provides detailed technical specifications for the engine, including dimensions, clearances, and torque values, which are essential for performing accurate repairs.

**Transmission, Drive Chain & Sprockets:** This section focuses on the transmission, drive chain, and sprockets, including assembly, disassembly, and troubleshooting tips for common problems.

**Steering System:** This section covers the steering system, including the steering head, handlebars, and forks, providing detailed instructions for maintaining and repairing these components.

**Shocks:** This section covers the motorcycle's suspension system, including the front and rear shocks. It provides detailed instructions for adjusting and maintaining the shocks to ensure optimal handling and performance.

**Body Work:** This section covers the motorcycle's bodywork, including the fenders, panels, and seat. It provides instructions for disassembling, repairing, and reassembling these components.

**Intake & Exhaust:** This section covers the motorcycle's intake and exhaust systems, including the airbox, carburetor, and exhaust pipe. It provides detailed instructions for maintaining and troubleshooting these systems.

**Electrical System:** This section covers the motorcycle's electrical system, including the battery, wiring harness, and electrical components. It provides detailed troubleshooting guides and repair instructions for the electrical system.

**Advanced Troubleshooting:** This section provides in-depth troubleshooting information for various mechanical and electrical issues. It includes diagnostic tips and procedures for identifying and resolving common problems.

This comprehensive manual is an invaluable resource for both experienced mechanics and DIY enthusiasts. It provides everything you need to maintain, repair, and troubleshoot your 1990-1991 Kawasaki KDX125 or KDX250 2-stroke motorcycle.

The 1990-1991 Kawasaki KDX125 and KDX250 were highly regarded off-road motorcycles, revered for their nimble handling and potent two-stroke engines. These models represented the pinnacle of Kawasaki's off-road engineering during that era, offering a balance of performance and usability that catered to a wide range of riders, from beginners to seasoned enthusiasts. The KDX125, boasting a compact 124cc engine, proved to be a fantastic entry point for young riders and those seeking a lighter and more agile experience. Its responsive power delivery and forgiving nature made it ideal for tackling trails and tight technical sections. Conversely, the KDX250, powered by a robust 249cc engine, delivered a more aggressive punch, making it a capable contender for more challenging terrain and competitive riding. Both models featured a durable, lightweight steel frame, providing a solid foundation for confident handling and stability. Suspension duties were handled by telescopic forks and a single shock absorber, offering a balance of comfort and control over varying terrain.

The 1990-1991 KDX models were further enhanced by their ergonomics and user-friendly features. With a low seat height and a narrow chassis, these motorcycles offered a comfortable and accessible riding position, allowing riders of various sizes to feel at home. The KDX125 and KDX250 were also equipped with reliable and responsive brakes, ensuring confident stopping power in a variety of conditions. These two-stroke motorcycles offered a pure and engaging riding experience, captivating riders with their raw power and nimble handling. Their ability to conquer a wide range of terrains, from tight woods to open trails, cemented their status as iconic off-road machines. Despite being discontinued, the 1990-1991 KDX125 and KDX250 remain cherished by enthusiasts, representing a golden era of off-road motorcycling characterized by simplicity, performance, and pure riding enjoyment.