Honda FourTrax Rancher TRX400FA/FGA 2004-2007 ATV Factory Service Manual
Honda Models Covered & Key Technical Specifications
Models: Honda TRX400FA, Honda TRX400FGA
Sub-models / Variants: FourTrax Rancher AT, FourTrax Rancher AT GPScape
Trade Names: FourTrax Rancher
Model Years: 2004–2007
Serial Numbers: 07ZA0-MJ40100
Technical Data:
- Engine type: Single cylinder, longitudinally installed OHV
- Engine displacement: 397 cc
- Cooling system: Air cooled
- Transmission type: HONDAMATIC (automatic; non-stage speed) with sub-transmission
- Drive system: Selectable 4WD
- Battery capacity: 12 V, 12 Ah
- Alternator capacity: 0.32 kW at 5,000 rpm
Honda Manual Features & Content Preview
- Comprehensive reference data for 2004–2007 Honda TRX400FA and TRX400FGA FourTrax Rancher AT variants, including GPS-equipped models
- Official Honda OEM publication 07ZA0-MJ40100 featuring 513 pages of technical data, engine assembly procedures, and chassis specifications
- Component removal illustrations to assist with complex repair planning and routine maintenance
- Detailed documentation of the proprietary HONDAMATIC transmission logic and specific GPS navigation meter functions unique to the FGA trim
Component Documentation
This reference volume delivers in-depth information on frame configurations, exhaust routing, and lubrication system diagnostics. Every major assembly is mapped out for professional technicians. The text details engine tear-down configurations, covering cylinder head tolerances, piston geometry, and crankshaft service. Additionally, the electrical sections map out the charging circuit and exact ignition timing requirements. Understanding sub-transmission and HONDAMATIC system operation is crucial before tearing into the drivetrain. Because working with heavy ATV mechanical assemblies and pressurized fluids carries inherent physical risks, always follow proper workshop safety protocols and use appropriate protective gear.
Specification Highlights
Having exact factory values readily available on your workbench eliminates guesswork. It drastically cuts down diagnostic time. This technical baseline serves as a descriptive reference for professional mechanics executing extensive ATV repair projects.
- Engine hanger torque: 54 N·m
- Crankshaft runout limit: 0.05 mm
- Valve clearance (cold): 0.15 mm for both intake and exhaust
- Oil pump rotor tip clearance: 0.15 mm standard
- Oil pressure verification: Specified testing at 1,400 and 4,000 rpm within the front crankcase cover
While these specifications help identify part tolerances and wear limits, the original OEM documentation remains the authoritative source for active workshop environments.
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