This manual provides comprehensive service and repair information for the KXR 90 All-Terrain Vehicle (ATV). Known for its robust engineering and reliability, the KXR 90 is designed as a youth-oriented recreational ATV, offering a solid introduction to off-road riding. A reputable Taiwanese manufacturer is recognized for producing quality powersports vehicles. This factory service repair manual is tailored for owners and independent repair shops, ensuring the KXR 90 remains in optimal condition for all its intended uses. The scope of this English-language manual covers all essential aspects of the KXR 90, from routine preventative maintenance and fluid specifications to in-depth troubleshooting, diagnostics, and complete repair procedures. It details engine overhaul, drivetrain maintenance, clutch and fuel system service, brake system repair, suspension and steering adjustments, and electrical system diagnostics, including comprehensive wiring diagrams. This resource is designed to assist users of all skill levels, from novice owners to experienced technicians, in maintaining and repairing their KXR 90 ATV effectively and efficiently. 🏷️ Basic Information Identification Make: KYMCO Model: KXR 90 Vehicle Type: All-Terrain Vehicle (ATV) 👋 Introduction Market Position Target Audience: KYMCO KXR 90 ATV owners and independent repair shops Competitive Analysis Competitor Manuals: Directly competes with official KYMCO service documentation for accessibility and completeness Key Features Manual Features: Detailed substeps, notes/cautions/warnings, numbered instructions, bold figure numbers, enlarged insets Usability: Numbered table of contents for quick information retrieval Diagnostic Focus: Emphasis on troubleshooting and electrical system repair with integrated wiring diagrams Value Proposition Professional Grade: Trusted by professional workshop technicians 📋 Manual Details Coverage Areas Primary Coverage: Complete Service and Repair Secondary Coverage: Troubleshooting, Diagnostics, Electrical Systems, Schematics Page Count Estimated Page Count: N/A (Digital PDF) Manual Type Type: Factory Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: Full overhaul, tuning, component replacement, internal lubrication Drivetrain: Chain drive system, sprockets, lubrication, adjustment Transmission Transaxle: Component identification, lubrication, potential adjustments (as applicable) Clutch: Operation, adjustment, component inspection Fuel System: Carburetor assembly, fuel lines, fuel tank, filtration Exhaust System: Muffler, exhaust pipe, inspection, removal/installation Suspension: Front and rear suspension components, adjustment, inspection Shocks: Front and rear shock absorber inspection and potential service Brake Systems: Front and rear brake caliper service, brake fluid replacement, bleeding procedures, pad replacement Steering: Handlebar assembly, steering mechanism, tie rods, front wheel alignment Body Frame Mounting: Chassis inspection, body panel removal/installation, mounting hardware Electrical Distribution: Component identification, wiring harnesses, fuses, relays Battery Charging Systems: Battery maintenance, charging system testing, stator and regulator/rectifier function Lighting Systems: Headlight, taillight, brake light operation, bulb replacement Instrumentation Warnings Systems: Indicator lights, speedometer (if equipped), warning lamp diagnostics Climate Control: N/A (Not applicable to this ATV model) Audio Systems: N/A (Not typically equipped on this model) Procedures Included Preventative Maintenance: Fluid level checks, lubrication points, chain adjustment, filter replacement Troubleshooting: Systematic diagnostics for common issues, symptom-based troubleshooting Repair Procedures: Step-by-step instructions for component replacement and repair Electrical Troubleshooting: Detailed wiring diagrams, component testing, fault diagnosis Assembly Disassembly: Detailed procedures for removing and reinstalling major components and subassemblies Technical Depth Depth: Comprehensive (from basic maintenance to advanced repair) User Level: Suitable for both novice and experienced technicians 📊 Manual Specifications File Format Digital Format: PDF Print Quality Printable: Yes, without restriction Image Quality: High-resolution illustrations, drawings, and photos Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Requirements Software Requirement: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke (presumed based on typical ATV configurations of this era) Displacement: Approximately 89cc (standard for a 90cc class ATV) Bore X Stroke: Specific dimensions to be found within the manual Compression Ratio: Specific ratio to be found within the manual Performance Horsepower: Not explicitly stated, but typical for the class (e.g., 5-7 HP) Torque: Not explicitly stated, but typical for the class Fuel System Fuel Delivery: Carburetor (likely a Keihin or similar, specific model in manual) Carburetor Size: Specific bore size of carburetor to be found within the manual Fuel Type: Unleaded gasoline Lubrication Oil Type: Specific API classification (e.g., SG or higher) and viscosity grade (e.g., 10W-40) to be found within the manual Oil Capacity: Specific oil capacity in liters/quarts to be found within the manual 🔧 Transmission Standard Transmission Type: Automatic (CVT - Continuously Variable Transmission) is typical for this class Drive System: Chain drive to rear axle Optional Optional Transmissions: N/A Features Transmission Fluid: Specific type and capacity to be found within the manual 📐 Dimensions Exterior Length: Not specified, but typical for youth ATVs (e.g., 50-60 inches) Width: Not specified, but typical for youth ATVs (e.g., 30-40 inches) Height: Not specified, but typical for youth ATVs (e.g., 30-40 inches) Weights Dry Weight: Not specified, but likely in the 150-200 lb range Curb Weight: Not specified, but likely includes fluids and battery Payload Capacity: Not specified, but designed for youth rider...