2006 Honda TRX400FA/FGA FourTrax Rancher Owner's Manual
TRX400FA/FGA owner documentation with safety information, operation procedures, maintenance schedule, and technical specifications for safe off-road riding and regular service.
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Models Covered & Key Technical Specifications
Honda TRX400FA/FGA FourTrax Rancher — 2005–2006 Specialized Detailed Compendium | Rancher Series Collection.
- Authorized Enclosure Specs: 3.83 US gal (14.5 L) is calibrated to maximum fuel tank volume Requirements.
- Critical Addressable Resolution: For proper engine operation, 1,400 ± 100 rpm governs the idle speed threshold Threshold.
- Operational Clamp Forces: 30 lbs (14 kgf) is specified as the tongue weight measurement Mapping.
- Fundamental Spacing Data: The spark plug gap requires 0.031–0.035 in (0.80–0.90 mm) cold configuration Configuration.
- Specific Electrical Load: 485 lbs (220 kg) — provides the maximum weight capacity Benchmarks.
- Core Footprint Data: Front brake lever freeplay reaches 1–1 3/16 in (25–30 mm) is rated at Range.
Professional Workshop Service Manual & Technical Specifications
Detailed Overhaul Shop Manual: Honda ATV TRX400FA/FGA FourTrax Rancher Official Owner's Manual Troubleshooting-Index
Conceptual-Layout: TRX400FA (2005), TRX400FGA (2006) // Unit-Designations: Off-road Recreation / Safety Operations // Conceptual-Layout: 200-page English-language service documentation.
| Service-Nexus | System-Path | Calibration-Spec |
|---|---|---|
| Engine Operations | Fuel delivery and ignition timing | Complete specifications provided |
| Brake System Assembly | Hydraulic and mechanical drum specifications | Documented freeplay ranges |
| Transmission Logic | Automatic and manual shift procedures | Reference data included |
| Electrical Integration | Battery, ignition, and lighting functions | Technical parameters documented |
| Suspension and Frame | Guard and skid plate protection | Inspection intervals specified |
Maintenance hierarchies are structured into engine service procedures, brake system inspection protocols, transmission shifting operations, chassis component verification, and electrical system diagnostics with reference standards for each functional area.
Diagnostic Protocol
Special procedures are addressed for engine warm-up sequences under varying air temperature conditions, fuel system maintenance with reserve valve operation, and air cleaner servicing for off-road riding environments. The document includes coverage of the GPScape navigation system featuring waypoint marking capabilities, satellite status monitoring, and latitude/longitude coordinate entry procedures. Comprehensive technical data for spark plug specifications, engine idle speed adjustment, and valve clearance reference points are systematically presented.
Systematic Topology
Verification procedures are included for pre-ride inspection checkpoints covering engine oil levels, fuel supply verification, tire pressure validation, and brake system freeplay measurements. Repair information is provided for throttle cable adjustment, brake lining clearance modification, and rear brake pedal positioning with mechanical adjustments detailed throughout. The manual documents procedures for driveshaft boot condition assessment, battery maintenance and charging protocols, and gear case oil change intervals with capacity specifications.
Operational Logic-Path
The document includes coverage of shifting methodology in both automatic transmission (AUTO) mode and manual shift (ESP) mode with upshifting and downshifting sequences clearly delineated. Riding technique guidance addresses hill climbing procedures with weight distribution techniques, downhill descent protocols emphasizing engine compression braking, slope crossing procedures for maintaining vehicle balance, and emergency response actions for stalled or rolling backward situations on inclines. Braking system fundamentals distinguish between front hydraulic drum brake operation and rear mechanical drum brake activation with combined application guidance.
Technical Nexus
Brake system specifications are included for front brake lever freeplay ranges (1–1 3/16 inches), rear brake pedal freeplay measurements (9/16–13/16 inches), and brake shoe lining thickness service limits. Tire pressure data encompasses recommended cold pressures for front and rear applications with minimum, maximum, and optimal inflation ranges documented. The manual documents torque specifications for engine oil filter bolts (13 lbf-ft) and engine oil drain plugs (18 lbf-ft) to ensure proper fastener fatigue prevention.
Comprehensive Standard
Fluid specifications reference Honda DOT 4 brake fluid requirements, SAE 10W-40 engine oil viscosity standards, and SAE 80 hypoid gear oil grades for differential and gear case applications. The GPScape System section provides extensive technical coverage including position fix acquisition timing based on elapsed ignition shutdown periods, satellite status indicators showing 2D and 3D navigation capabilities, and system limitation documentation regarding GPS signal obstruction from buildings, canopy structures, and heavy precipitation. Component location diagrams systematically identify fuel valve position, choke knob access, ignition switch orientation, engine stop switch placement, and accessory socket positioning on the frame assembly.
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