🏷️ Basic Information Identification Make: Honda Model: TRX250R Fourtrax Model Variant: TRX250R Product Type: ATV Production Years Covered: 1986, 1987, 1988, 1989 👋 Introduction Market Position Segment: High-performance sport ATV segment. Reputation: Renowned for its powerful two-stroke engine, agile handling, and competitive racing heritage. Competitive Analysis Competitors: Competed against other performance ATVs of its era, such as Yamaha Warrior, Suzuki LT250R, and Kawasaki Tecate. Key Features Engine Type: High-revving, liquid-cooled, two-stroke engine. Suspension Design: Advanced front and rear suspension for superior handling and comfort on varied terrain. Braking System: Powerful hydraulic disc brakes for reliable stopping power. Performance Orientation: Designed for sport riding, trail riding, and recreational racing. 📋 Manual Details Coverage Areas Engine: Complete Engine Overhaul, Diagnosis, Repair Transmission: Gearbox, Clutch, Kick Starter, Shift Linkage Suspension: Front & Rear Suspension, Steering Components Brakes: Hydraulic Disc Brake System Maintenance and Repair Electrical: Complete Electrical System Diagnosis and Repair Fuel System: Carburetion, Fuel Tank, Fuel Lines Cooling System: Radiator, Hoses, Coolant Management Bodywork: Fenders, Exhaust System Maintenance: Scheduled Maintenance, Lubrication, Tune-ups Troubleshooting: Problem Diagnosis and Solutions Page Count Total Pages: 224 Manual Type Type: Official Workshop Service and Repair Manual Purpose: Repair, Maintenance, Rebuild, Refurbish, Restoration Language Language: English Format File Format: PDF Printability: Printable Pages 📖 Manual Coverage Systems Covered Engine Assembly: Detailed disassembly, inspection, and reassembly of all engine components including cylinder head, cylinder, piston, connecting rod, crankshaft, and bearings. Ignition System: Diagnosis and repair of the ignition system, including stator, CDI unit, spark plug, and wiring. Cooling System: Information on the liquid-cooled system, including radiator, fan, thermostat, coolant capacity, and flush procedures. Lubrication System: Details on the oil pump, oil filter, oil passages, and oil change procedures. Drivetrain: Coverage of the transmission, clutch operation, gearshift mechanism, and kick starter assembly. Chassis And Suspension: Detailed procedures for front and rear suspension (A-arm, swingarm, shocks), steering system components, and wheel alignment. Braking System: Comprehensive coverage of the hydraulic disc brakes, including caliper maintenance, brake fluid specifications, bleeding procedures, and component replacement. Electrical Circuitry: Detailed wiring diagrams, component locations, and troubleshooting guides for all electrical systems, including lighting, ignition, and accessories. Procedures Included Diagnostic Procedures: Step-by-step diagnostic flowcharts and troubleshooting guides for common and uncommon issues. Repair Procedures: Detailed, illustrated instructions for the repair or replacement of virtually every component on the ATV. Maintenance Schedules: Recommended service intervals for oil changes, filter replacements, spark plug checks, chain adjustments, and other routine maintenance tasks. Rebuilding Procedures: Complete instructions for rebuilding major components such as the engine, transmission, and carburetor. Torque Specifications: Precise torque values for all fasteners to ensure correct assembly and prevent damage. Assembly Instructions: Clear, sequential instructions for assembling and disassembling the ATV. Technical Depth Depth: Comprehensive Workshop Level - suitable for professional technicians and advanced DIY enthusiasts. Illustrations: Detailed illustrations, diagrams, and exploded views of all components and systems. 📊 Manual Specifications File Format Format: PDF Print Quality Quality: High-resolution, printable pages for clear viewing in a workshop environment. Binding Type Binding: Digital (PDF) - No physical binding Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Type: Liquid-cooled, 2-stroke, single-cylinder Displacement: 246 cc Bore X Stroke: 67.0 mm x 70.0 mm Compression Ratio: 6.6:1 (approximate, varies by year) Carburetor: Keihin PD78A (or similar Mikuni, depending on year) Performance Horsepower: Approx. 20-25 HP (peak, varies by year and tuning) Torque: Approx. 18-20 lb-ft (peak, varies by year) Fuel System Fuel Type: Unleaded gasoline (91 octane or higher recommended) Fuel Mixture: Pre-mix (50:1 ratio of gasoline to two-stroke oil) Cooling System Coolant Type: Honda HP Coolant (or equivalent ethylene glycol-based coolant) Coolant Capacity: Approx. 1.5 L 🔧 Transmission Standard Type: Constant-mesh 5-speed manual with reverse Features Clutch: Wet, multi-plate clutch Final Drive: O-ring sealed chain drive Transmission Oil: Honda Transmission Oil API SG SAE 10W-30 (or equivalent) 📐 Dimensions Exterior Length: Approx. 73.0 inches (1855 mm) Width: Approx. 45.1 inches (1145 mm) Height: Approx. 42.7 inches (1085 mm) Wheelbase: Approx. 49.2 inches (1250 mm) Weights Dry Weight: Approx. 360 lbs (163 kg) Wheels And Tires Front Tire Size: AT22 x 7-10 (or similar) Rear Tire Size: AT22 x 10-9 (or similar) Front Wheel Offset: N/A (integrated hub) Rear Wheel Bolt Pattern: N/A (integrated hub) 🛡️ Safety Features Ratings Atv Safety Standards: Complies with ANSI safety standards for recreational ATVs. Active Features Braking System: Dual front hydraulic disc brakes, single rear hydraulic disc brake. Passive Features Handlebar Design: Grip-style throttle with thumb lever for precise control. Lighting: Headlights and taillight for visibility. 💡 Technology Features Infotainment Display: Basic instrument cluster (speedometer, tachometer, neutral indicator, oil pressure light). Driver Assistance Throttle Control: Thumb throttle for precise acceleration control. Connectivity Features: None (Analog system) 🔧 Maintenance Service Intervals Engine Oil Change: Every 1000 km or 6 months, whichever comes first. Check level more frequently. Air Filter Cleaning: Every 20 hours of...