The Mongoose KXR 50/90 is a robust and reliable ATV designed for youthful riders and recreational off-road adventures. Built by a company with a strong heritage in manufacturing quality powersports vehicles since 1964, this model offers a scaled experience for various skill levels. Known for its durable construction and accessible performance, the Mongoose KXR series provides an engaging platform for exploring trails and developing riding skills, embodying a commitment to delivering dependable and enjoyable vehicles. This comprehensive Service Repair Manual provides in-depth guidance for the Mongoose KXR 50/90. Covering all essential systems from the engine and transmission to the chassis, brakes, and electrical components, it offers detailed procedures for maintenance, troubleshooting, and repair. With step-by-step instructions, diagnostic charts, technical specifications, and clear illustrations, this manual serves as an indispensable resource for DIY enthusiasts, owners, and independent repair professionals seeking to maintain their vehicle's optimal performance and longevity. 🏷️ Basic Information Identification Make: Kymco Model: Mongoose KXR 50/90 Codes Product Id: KYMCO-Mongoose-KXR-50-90-SM 👋 Introduction Market Position Target Audience: DIY enthusiasts, ATV owners, independent repair shops seeking factory-level repair information. Competitive Analysis Manual Type Comparison: Factory Service Repair Manual, providing OEM-level detail beyond generic repair guides. Key Features Authenticity: Genuine Kymco product, ensuring accuracy and completeness of repair procedures. Content Depth: Covers all systems, maintenance, and repairs for the Mongoose KXR 50 and 90 models. 📋 Manual Details Coverage Areas Manual Type: Service Repair Manual Language: English Page Count: 246 Format: PDF Download 📖 Manual Coverage Systems Covered Engine System: Complete engine overhaul, component diagnostics, top-end and bottom-end procedures, carburetor/fuel injection tuning, cooling system maintenance, exhaust system service. Transmission System: Automatic CVT (Continuously Variable Transmission) disassembly, inspection, belt replacement, clutch and variator servicing, gearbox maintenance and repair. Chassis And Frame: Frame inspection, front and rear suspension geometry, shock absorber servicing, steering system components and adjustments, swingarm maintenance. Braking System: Front and rear brake caliper service, brake pad replacement, brake fluid bleeding and replacement, hydraulic system troubleshooting, drum brake (if applicable) adjustment and service. Electrical System: Ignition system diagnostics, starter motor and solenoid testing, lighting circuits (headlight, taillight, turn signals), battery maintenance and testing, charging system (stator, regulator/rectifier) checks, wiring harness inspection and repair, fuses and relays. Bodywork And Trim: Body panel removal and installation, seat servicing, fender and guard maintenance, handle bar components, decal and graphic application (if applicable). Procedures Included Preventative Maintenance: Recommended service intervals for oil changes, filter replacements, spark plug checks, chain lubrication (if applicable), brake adjustments, tire pressure checks. Troubleshooting: System-by-system diagnostic charts for common running issues, electrical faults, starting problems, and performance degradation. Repair Procedures: Detailed step-by-step instructions for disassembly, component replacement, and reassembly of all major vehicle systems. Technical Specifications: Torque specifications for critical fasteners, engine timing adjustments, carburetor jetting information, valve clearances (if applicable). Technical Depth Diagnostic Capabilities: Advanced diagnostic procedures, including identification of faulty components and troubleshooting common electrical and mechanical failures. Rebuild Procedures: Comprehensive guidance for complete engine and transmission rebuilds, including component measurement and tolerance checks. Wiring Diagrams: High-quality, detailed wiring diagrams for all electrical systems, facilitating accurate troubleshooting and repair. Illustrations: Hundreds of photos and diagrams illustrating disassembly, assembly, and component identification. 📊 Manual Specifications File Format File Format: PDF File Size Estimate: Up to 1 Gigabyte (after decompression) Print Quality Print Quality: High Quality, Fully Printable Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Navigation Bookmarking: Bookmarked for easy navigation ⚙️ Engine Specifications Primary Engine Engine Type 50Cc: Air-cooled, 2-stroke, single-cylinder (specific model dependent, typically a variation of the Kymco CK1 engine architecture). Engine Type 90Cc: Air-cooled, 2-stroke, single-cylinder (specific model dependent, typically a bored-out version of the 50cc engine or a dedicated 90cc unit). Performance Bore Stroke 50Cc: Typically around 39mm x 41.4mm (subject to specific engine variant). Bore Stroke 90Cc: Typically around 46mm x 49.6mm (subject to specific engine variant). Fuel System Carburetor Spec 50Cc: Mikuni VM20 or similar (specific model dependent, manual will detail exact type and jetting). Carburetor Spec 90Cc: Larger carburetor, typically Mikuni VM24 or similar (specific model dependent, manual will detail exact type and jetting). Fuel Type: Unleaded gasoline with 2-stroke oil mix (pre-mix or oil injection system dependent, manual will specify). 🔧 Transmission Standard Transmission Type: Automatic CVT (Continuously Variable Transmission) Optional Gear Reduction: Primary and secondary gear reduction, details provided in manual. Features Clutch Type: Centrifugal clutch 📐 Dimensions Exterior Length: Refer to specific model year specifications within the manual (typically around 1500-1600 mm). Width: Refer to specific model year specifications within the manual (typically around 900-1000 mm). Height: Refer to specific model year specifications within the manual (typically around 950-1050 mm). Weights Dry Weight 50Cc: Typically around 90-100 kg (manual will have precise figures). Dry Weight 90Cc: Typically around 95-105 kg (manual will have precise figures). 🛡️ Safety Features Ratings Safety Features Overview: Designed for...