🏷️ Basic Information Identification Make: Honda Model: TRX400EX Sportrax Model Nickname: Sportrax 400EX Vehicle Type: All-Terrain Vehicle (ATV) Codes Model Code Variants: TRX400EX Generation Production Years Covered: 1999, 2000, 2001, 2002, 2003, 2004 👋 Introduction Market Position Target Audience: Honda TRX400EX Sportrax owners, DIY mechanics, repair shops Competitive Analysis Dealer Equivalent: Same type of service manual used by local dealers Key Features Value Proposition: Saves money on repair and maintenance costs, empowers owners with knowledge Convenience: Instant download, printable pages for workshop use, no shipping delays Endorsement Customer Satisfaction: Guaranteed 📋 Manual Details Coverage Areas Manual Title: 1999-2004 Honda TRX400EX Sportrax Service Repair Manual Manual Type: Official Full Workshop Service Repair Manual (FSM) Page Count Total Pages: 263 Language Language: English Format File Format: PDF Delivery Method: Instant Download System Requirements: Adobe PDF Reader Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine: Complete tear down and rebuild, cylinder head, valve, cylinder, piston, lubrication system, fuel system, alternator, starter clutch, crankcase, transmission, crankshaft Chassis: Frame, body panels, exhaust system, front wheel, suspension, steering, rear wheel, suspension, swingarm Brakes: Hydraulic disc brake system, front and rear brake components, bleeding procedures Electrical: Battery, charging system, ignition system, electric starter, lights, switches, wiring diagram Fuel System Details: Carburetor (carboretor/carburettor) tuning, jetting (slow jet, main jet, pilot jet), mixture screw adjustment, fuel pump (if applicable, though this model is carbureted), fuel tank, fuel lines Procedures Included Maintenance: Scheduled maintenance, fluid changes (coolant, oil), filter replacements, general upkeep Repair: Complete rebuild procedures for engine, transmission, suspension, brakes, and electrical components Troubleshooting: Diagnostic procedures for common and uncommon issues, 'no spark' diagnosis, performance problems, error code explanations (if applicable to electronic components) Installation Removal: Engine removal/installation, component installation and removal procedures for all major systems Technical Depth Scope Of Repair: Covers everything from basic maintenance to complete overhaul and restoration Detail Level: Highly detailed, FSM preview with pictures, part diagrams, torque specs 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Printable without any restriction Binding Type Binding: Digital (Downloadable) Paper Type Paper Type Equivalent: N/A (Digital) Searchability Text Searchability: Implied by PDF format, though not explicitly stated ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, longitudinally-mounted single-cylinder Displacement: 397cc Bore X Stroke: 85.0 mm x 70.0 mm Compression Ratio: 8.6:1 Performance Horsepower Approximate: Approx. 28-32 HP (at flywheel, varies by year/tune) Torque Approximate: Approx. 25-28 lb-ft (at flywheel, varies by year/tune) Fuel System Carburetor Type: Keihin 34mm flat-slide carburetor Fuel Capacity: 2.4 US gal (9.1 L), including 0.5 US gal (1.9 L) reserve Lubrication System Oil Type: API SG or higher, SAE 10W-40 recommended (specific viscosity based on ambient temperature) Oil Capacity: Approx. 1.9 L (2.0 US qt) for oil change, 2.1 L (2.2 US qt) after filter replacement, 2.5 L (2.6 US qt) after engine disassembly Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Cooling System Cooling Method: Liquid-cooled Coolant Type: Honda HP Coolant or equivalent (50/50 mix of ethylene glycol and deionized water) 🔧 Transmission Standard Transmission Type: 5-speed manual with reverse Clutch Type: Wet, multi-plate Features Gearshift Linkage: Standard foot-operated gearshift linkage Drive Train: O-ring-sealed chain drive Transmission Fluid Transmission Oil Type: Honda Manual Transmission Fluid (MTF) or equivalent API GL-3/GL-4 gear oil Transmission Oil Capacity: Approx. 0.75 L (0.79 US qt) 📐 Dimensions Weights Dry Weight: Approx. 341.7 lbs (155 kg) Curb Weight: Approx. 363.8 lbs (165 kg) Exterior Length: Approx. 72.0 in (1830 mm) Width: Approx. 45.1 in (1145 mm) Height: Approx. 43.2 in (1098 mm) Wheelbase: Approx. 49.6 in (1260 mm) Ground Clearance: Approx. 4.0 in (102 mm) Wheels Tires Front Tire Size: AT22 x 7-10 Rear Tire Size: AT20 x 10-9 Front Wheel Type: Aluminum alloy Rear Wheel Type: Aluminum alloy Suspension Front Suspension Type: Independent, double wishbone with adjustable spring preload shocks Rear Suspension Type: Swingarm with adjustable spring preload shock absorber 🛡️ Safety Features Ratings Safety Features General: Designed for off-road recreational use, not street legal. Emphasis on rider control and stability. Active Features Braking System: Hydraulic disc brakes front and rear for strong stopping power. Passive Features Frame Construction: Steel frame designed for durability and rigidity. 💡 Technology Features Infotainment Infotainment System: N/A (Basic ATV design). Driver Assistance Electronic Aids: No electronic driver assistance features typical of modern vehicles; relies on mechanical systems and rider input. Connectivity Connectivity Features: N/A. 🔧 Maintenance Service Intervals Engine Oil Change Interval: Every 600 miles (1000 km) or 6 months (refer to manual for specific conditions). Air Filter Cleaning: Every 200 miles (300 km) or more frequently in dusty conditions. Spark Plug Inspection: Every 600 miles (1000 km). Valve Clearance Check: Every 600 miles (1000 km) or annually. Fluid Specifications Brake Fluid Type: DOT 3 or DOT 4 Honda Brake Fluid Coolant Capacity: Approx. 1.7 L (1.8 US qt) Known Issues Common...