This manual covers the Mongoose KXR 90 and KXR50 ATVs, produced between 2003 and 2007. A reputable Taiwanese manufacturer is known for producing reliable and accessible vehicles. The Mongoose series specifically targets the youth and entry-level ATV market, offering a balanced blend of performance and user-friendliness. These ATVs are designed for recreational trail riding and general utility purposes, embodying a commitment to quality engineering and value. This comprehensive Factory Service and Repair Workshop Manual provides in-depth guidance for all aspects of maintaining and repairing your Mongoose KXR 90 or KXR50. It includes detailed instructions for routine maintenance, engine and transmission servicing, electrical system diagnostics, chassis and suspension repairs, and brake system overhauls. With step-by-step procedures, clear explanations, and visual aids such as pictures and wiring diagrams, this manual is an essential resource for both DIY mechanics and professional technicians seeking to keep their ATV in optimal condition. 🏷️ Basic Information Identification Make: Kymco Model: Mongoose KXR 90 / KXR50 Model Variant: ATV Product Type: Factory Service and Repair Workshop Manual 👋 Introduction Market Position Target User: DIY mechanics, ATV owners seeking to perform maintenance and repairs. Competitive Analysis Value Proposition: Provides comprehensive factory-level repair information for cost-effective DIY maintenance, saving on professional labor costs. Key Features Instant Access: Immediate availability via digital download allows users to start repairs without delay. Visual Guidance: Inclusion of pictures and diagrams enhances understanding of complex procedures. 📋 Manual Details Coverage Areas Model Years Covered: 2003, 2004, 2005, 2006, 2007 Engine Variants Covered: All engine types for KXR 90 and KXR50 models Geographic Applicability: Global (based on model availability) Page Count Estimated Page Count: Likely 200-400 pages (typical for this type of manual; exact count not provided) Manual Type Manual Type: Comprehensive Service and Repair Workshop Manual Language Language: English Format Digital Format: PDF Delivery Method Delivery: Instant Download 📖 Manual Coverage Systems Covered Engine: Complete overhaul, diagnosis, tuning, lubrication system, cooling system, fuel system (carburetor specific details). Transmission Drivetrain: Clutch operation, gearbox inspection, chain drive maintenance, differential (if applicable). Electrical System: Wiring diagrams, ignition system, lighting, battery charging system, starter system, fuses, relays. Chassis Suspension: Front and rear suspension, steering system, wheel bearings, shock absorbers, bushings. Braking System: Front and rear brake systems (likely drum or disc), brake fluid, hydraulic lines, caliper/wheel cylinder service. Fuel System: Carburetor disassembly, cleaning, adjustment, fuel lines, fuel filter, fuel tank. Exhaust System: Muffler, exhaust pipe inspection and replacement. Cooling System: Air-cooled engine specifics, cooling fins, heat dissipation. Frame Body: Frame inspection, body panel removal/installation, seat, handlebars, controls. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain lubrication and adjustment, tire pressure checks, brake adjustments, general inspections. Troubleshooting: Diagnostic flowcharts, common problem identification and solutions. Repair Procedures: Step-by-step instructions for component disassembly, repair, and reassembly. Rebuilds: Engine top-end rebuilds, carburetor rebuilds, transmission servicing. Electrical Diagnostics: Testing ignition coils, stator, rectifier, starter motor, and troubleshooting electrical faults. Carburetor Adjustment: Idle speed, air-fuel mixture adjustments. Technical Depth Depth Of Information: A-Z coverage for all servicing and repair procedures. Instruction Style: Very easy to follow step-by-step instructions with pictures. Visual Aids: Includes pictures and wiring diagrams. 📊 Manual Specifications File Format File Format Compatibility: Windows, macOS, Linux Searchability: Likely searchable text within PDF for efficient information retrieval. Print Quality Print Capability: Printable pages Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Likely single-cylinder, 4-stroke, air-cooled (typical for this class of ATV) Displacement Kx 90: Approximately 89cc (for KXR 90) Displacement Kx 50: Approximately 49cc (for KXR50) Performance Bore X Stroke: Specifics vary by engine size, detailed in manual. Compression Ratio: Specifics vary by engine size, detailed in manual. Fuel System Fuel Delivery: Carburetor (specific model and settings detailed in manual). Recommended Fuel: Unleaded gasoline (specific octane rating likely detailed). Ignition Ignition System: CDI (Capacitor Discharge Ignition), details on timing and components. Lubrication Oil Type Kx 90: Specific Kymco recommended 4-stroke engine oil or equivalent (e.g., SAE 10W-40 API SG or higher), capacity detailed. Oil Type Kx 50: Specific Kymco recommended 4-stroke engine oil or equivalent (e.g., SAE 10W-30 API SF or higher), capacity detailed. 🔧 Transmission Standard Transmission Type: Automatic Continuously Variable Transmission (CVT) Drive System: Chain drive to rear axle Features Clutch Type: Centrifugal automatic clutch Gear Selection: Forward, Neutral, Reverse (if equipped) 📐 Dimensions Exterior Wheelbase: Specific dimensions provided in manual, typically around 42-45 inches. Overall Length: Specific dimensions provided in manual, typically around 65-70 inches. Overall Width: Specific dimensions provided in manual, typically around 37-40 inches. Overall Height: Specific dimensions provided in manual, typically around 40-43 inches. Weights Dry Weight: Specific weights provided in manual, likely in the 150-200 lb range. Ground Clearance: Specific ground clearance details provided in manual. 🛡️ Safety Features Ratings Atv Safety Standards: Adherence to relevant ATV safety standards (e.g., ANSI, ATVA)....