This manual covers the Mongoose 90 / KXR 90 and Mongoose 50 / KXR 50 All-Terrain Vehicles (ATVs). Established in 1963, the manufacturer is known for its diverse range of powersports vehicles. The Mongoose and KXR series represent offerings in the youth and recreational ATV segment, designed for reliable performance and enjoyment. These ATVs are engineered for a balance of capability and user-friendliness, making them suitable for a variety of off-road activities. This comprehensive service and repair manual provides detailed instructions for the complete service and repair of your ATV. It covers all essential systems, including engine components, lubrication, fuel, chassis, electrical systems, and transmission. Within its pages, you will find step-by-step repair procedures, diagnostic guidance, troubleshooting tips, maintenance schedules, and technical specifications, all supported by hundreds of photos, illustrations, and wiring schematics. This resource is designed to assist both do-it-yourself enthusiasts and professional mechanics in maintaining and repairing these vehicles efficiently and effectively. 🏷️ Basic Information Identification Make: Kymco Model: Mongoose 90 / KXR 90, Mongoose 50 / KXR 50 Vehicle Type: All-Terrain Vehicle (ATV) 👋 Introduction Market Position Target Audience: Do-it-yourselfers and experienced mechanics Key Features Manual Value Proposition: Inexpensive way to keep your vehicle working properly, guides through service and repair procedures with detailed illustrations. Content Quality Completeness Guarantee: 100% Complete and Intact, no missing/corrupt pages/sections Visuals Illustrations Diagrams: Hundreds of photos, illustrations, exploded diagrams, and wiring schematics Competitive Analysis Market Segment: Youth/entry-level recreational ATVs, competing with models from Yamaha (e.g., Raptor 90), Suzuki (e.g., LT-Z50/90), and Polaris (e.g., Outlaw 50/90). 📋 Manual Details Coverage Areas Covered Models: Kymco Mongoose 90, Kymco KXR 90, Kymco Mongoose 50, Kymco KXR 50 Coverage Scope: Complete Service and Repair Page Count Estimated Page Count: Not specified, but described as 'COMPLETE' Manual Type Manual Type: Official Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Systems: General Information, Lubrication System, Fuel System, Engine Removal, Cylinder Head/Valves, Cylinder/Piston, Drive/Driven Pulleys, Final Reduction/Transmission, Crankcase/Crankshaft Chassis Systems: Frame Covers/Exhaust Muffler, Front Wheel/Front Brake/Front Suspension/Steering System, Rear Wheel/Swing Arm/Hydraulic Brake Electrical Systems: Battery/Charging System/A.C. Generator, Ignition System, Starting System, Bulbs Removal/Instrument/Horn Exhaust System: Frame Covers / Exhaust Muffler section covers exhaust system components. Suspension System: Front Suspension and Rear Swing Arm coverage. Steering System: Steering System coverage. Lighting System: Bulbs Removal section covers headlight, taillight, and indicator bulbs. Procedures Included Repair Procedures: Complete tear down and rebuild, diagnostic and repair procedures, troubleshooting Maintenance Procedures: Inspection, Adjustment, Lubrication Wiring Schematics: Detailed wiring schematics are provided for the electrical system. Rebuild Procedures: Step-by-step instructions based on complete disassembly of the machine for rebuilds. Troubleshooting Guides: Dedicated troubleshooting section to diagnose and resolve issues. Technical Depth Technical Depth: Comprehensive: From basic maintenance and inspection to full engine and chassis rebuilds. Torqu Specifications: Detailed torque specifications are included for engine and chassis fasteners. 📊 Manual Specifications File Format File Format Details: PDF Print Quality Printability: Fully Printable Binding Type Binding Type: Digital Download (PDF) Paper Type Paper Type: N/A (Digital) Searchability Searchable: Yes Bookmarking Bookmarked: Yes Viewing Requirements Software Requirements: Adobe PDF Reader, WinZip Zoom Capability: Yes Compatibility Operating Systems: All Versions of Windows & Mac Delivery Delivery Method: Instant Download ⚙️ Engine Specifications Primary Engine 50 Engine Type 50: Air-cooled, 4-stroke (assumed based on typical Kymco 50cc ATVs) Displacement 50: Approximately 49cc (typical for this class, specific value in manual) Primary Engine 90 Engine Type 90: Air-cooled, 4-stroke (assumed based on typical Kymco 90cc ATVs) Displacement 90: Approximately 89cc (typical for this class, specific value in manual) Performance General Performance Description: Details for complete rebuilds, including torque specifications for engine components. Fuel System Fuel System Coverage: Carburetor (likely), fuel pump (if applicable), fuel lines, filters, and tank. Carburetor Details: Detailed specifications, adjustment procedures, and potential part numbers for the carburetor. 🔧 Transmission Drive System Transmission Type: CVT (Continuously Variable Transmission) with automatic clutch Transmission Coverage: Drive and Driven Pulleys, Final Reduction/Transmission System Clutch Type: Automatic centrifugal clutch 📐 Dimensions Exterior Dimensions Coverage: Frame Covers, Wheel and Suspension components imply general dimensions and component fitment. Weights Weights Coverage: Not explicitly detailed, but often included in general specifications for chassis components. 🛡️ Safety Features Active Features Braking System: Front Brake (type not specified, likely drum or disc), Rear Hydraulic Brake (type not specified, likely drum or disc) Passive Features Steering System: Steering System component details. 💡 Technology Features Infotainment Infotainment Features: Basic instrument cluster (speedometer, odometer, indicator lights) is covered under 'Bulbs Removal / Instrument'. Driver Assistance Driver Assistance Systems: Not applicable for this type of recreational ATV. 🔧 Maintenance Service Intervals Maintenance Schedule Coverage: Includes 'Inspection / Adjustment' and 'Lubrication System' sections, implying scheduled maintenance procedures. Fluid Specifications Lubrication System Details: Specific oil types, viscosities, and capacities for engine and transmission/final drive are expected to be detailed. Brake Fluid Type: Likely DOT...