This comprehensive repair manual covers all versions of the 1990-1991 Kawasaki KX125 and KX250 2-stroke motorcycles. It is your essential guide for performing repairs, routine maintenance, and troubleshooting on your machine. The manual provides detailed information on a wide range of topics, including:

* **General Information:** Get familiar with your motorcycle, its specifications, and important safety precautions.
* **Routine Maintenance:** Learn how to perform regular maintenance tasks such as oil changes, filter replacements, and adjustments to ensure optimal performance and longevity.
* **Engine Removal and Installation:** This section guides you through the process of removing and reinstalling your engine, covering everything from disconnecting components to proper torque specifications.
* **Fuel System:** Understand the intricacies of your fuel system, from the carburetor to the fuel lines, enabling you to diagnose and correct fuel-related issues.
* **Lubrication and Cooling System:** Learn about the vital role of lubrication and how to maintain the cooling system for optimal engine operation.
* **Engine Specifications:** Access detailed engine specifications for accurate diagnosis and repair.
* **Transmission, Drive Chain & Sprockets:** This section covers the transmission system, drive chain, and sprockets, providing information on adjustments, replacement, and troubleshooting.
* **Steering System:** Understand the components and workings of your motorcycle's steering system, and learn how to diagnose and repair steering issues.
* **Shocks:** The manual provides comprehensive guidance on understanding, adjusting, and maintaining your motorcycle's shock absorbers for optimal ride quality.
* **Body Work:** Learn about the various bodywork panels, their function, and how to repair or replace them.
* **Intake & Exhaust:** Explore the intake and exhaust systems, including the carburetor, air filter, and exhaust components, and learn how to maintain and troubleshoot them.
* **Electrical System:** The manual contains detailed information on your motorcycle's electrical system, covering components like the ignition system, wiring diagrams, and troubleshooting.
* **Advanced Troubleshooting:** This section equips you with advanced techniques to diagnose and solve more challenging problems.

With this repair manual, you have all the information you need at your fingertips to keep your Kawasaki KX125 or KX250 running smoothly.

The 1990-1991 Kawasaki KX125 and KX250 were high-performance, two-stroke motocross motorcycles that were highly regarded for their handling and power. These bikes were designed to be competitive machines, featuring a lightweight aluminum frame, a powerful engine, and advanced suspension technology for the time. The KX125 was powered by a liquid-cooled, 124cc, two-stroke engine that produced a claimed 30 horsepower, while the KX250 boasted a 249cc engine generating around 40 horsepower. Both models featured a six-speed transmission and a responsive, hydraulic disc brake system. The suspension was composed of telescopic forks in the front and a single shock absorber in the rear, providing exceptional handling and stability on rough terrain.

The 1990-1991 KX125 and KX250 were known for their aggressive styling, featuring a sharp, angular design. These bikes were often chosen by amateur and professional riders alike, thanks to their impressive performance and reliable build quality. The KX125 was particularly popular with younger or lighter riders due to its manageable power and nimble handling, while the KX250 provided more power for experienced riders and those seeking a more powerful machine. These two-stroke machines offered a thrilling riding experience, with their responsive engines and ability to rev quickly. They were, however, known for their demanding maintenance routines, requiring regular cleaning and lubrication of the engine and transmission. The 1990-1991 Kawasaki KX125 and KX250 remain popular choices for collectors and enthusiasts who appreciate these classic and powerful motocross machines.