This comprehensive service and repair manual provides in-depth information for the KYMCO Mongoose/KXR 90/50 ATV. It covers a wide range of topics essential for maintaining and repairing your ATV. You'll find detailed instructions for disassembling and assembling components, troubleshooting and resolving issues, and performing routine maintenance tasks. The manual includes detailed illustrations and diagrams to guide you through each procedure. The manual covers a wide range of topics, including: * **General Information:** Introduces the ATV's specifications, safety precautions, and basic maintenance procedures. * **Frame Covers/Exhaust Muffler:** Provides instructions for removing, installing, and maintaining these components. * **Inspection/Adjustment:** Guides you on inspecting and adjusting critical components like brakes, cables, and suspension systems. * **Lubrication System:** Explains the lubrication system, how to check and replace fluids, and proper maintenance procedures. * **Fuel System:** Covers the fuel system, including carburetor maintenance, fuel lines, and fuel tank inspection. * **Engine Removal:** Details the process for removing and reinstalling the engine. * **Cylinder Head/Valves:** Provides instructions for inspecting, adjusting, and replacing the cylinder head and valves. * **Cylinder/Piston:** Covers disassembly, inspection, and replacement of the cylinder and piston. * **Drive and Driven Pulleys:** Explains the operation of the drive and driven pulleys and provides instructions for their maintenance. * **Final Reduction/Transmission System:** Covers the final drive and transmission system, including disassembly, inspection, and repair procedures. * **Crankcase/Crankshaft:** Details the crankshaft and crankcase, including maintenance and repair guidance. * **Front Wheel/Front Brake/Front Suspension/Steering System:** Provides step-by-step instructions for maintaining and repairing the front wheel, brake system, suspension, and steering components. * **Rear Wheel/Swing Arm/Hydraulic Brake:** Covers the rear wheel, swing arm, and hydraulic brake system, including maintenance and repair. * **Battery/Charging System/A.C. Generator:** Explains the battery, charging system, and AC generator, providing procedures for troubleshooting and repair. * **Ignition System:** Details the ignition system, covering maintenance and repair procedures. * **Starting System:** Provides instructions for troubleshooting and repairing the starting system. * **Bulbs Removal/Instrument/Horn:** Explains the removal and replacement of bulbs, instrument operation, and horn maintenance. With this comprehensive manual, you'll have the knowledge and guidance to perform a wide range of maintenance and repair tasks on your KYMCO Mongoose/KXR 90/50 ATV.

The KYMCO Mongoose and KXR 90/50 are sporty and versatile all-terrain vehicles (ATVs) designed for riders of all ages and skill levels. These models are known for their affordability, reliability, and ease of use, making them popular choices for recreational riding, utility tasks, and even competitive racing. The Mongoose 90 and KXR 90 are powered by a 90cc single-cylinder, four-stroke engine that delivers ample power for off-road adventures. Meanwhile, the Mongoose 50 and KXR 50 are equipped with a smaller, 50cc engine, making them ideal for younger riders or those seeking a more manageable experience. Both engine options are known for their smooth operation and fuel efficiency, allowing riders to enjoy extended rides without worry. The KYMCO Mongoose and KXR 90/50 feature durable, lightweight chassis, designed for optimal handling and maneuverability. Their suspension systems provide a comfortable ride over challenging terrain, while the responsive braking system ensures safe stopping power. With its adjustable handlebar and seat height, the Mongoose 90/50 offers a comfortable and customizable riding experience for riders of varying sizes. The KXR 90/50, on the other hand, is designed with a sportier and aggressive aesthetic, featuring a lower seat height and a more forward-leaning riding position. All models come standard with safety features like a kill switch, front and rear brakes, and a sturdy roll cage, making them suitable for a wide range of riders and applications. The Mongoose and KXR 90/50 are not just ATVs, but rather entry points into the world of off-road exploration and adventure, offering a fun and engaging experience for riders of all ages and skill levels.