Model:
FourTrax Rancher 400 AT
Model Codes:
TRX400FA, TRX400FGA
Vehicle Type:
ATV (All-Terrain Vehicle)
Production Years Covered:
2004, 2005, 2006, 2007
Generation Identifier:
Fourth Generation (TRX400FA/FGA)
Chassis Codes:
TRX400FA (Standard AT), TRX400FGA (AT with GPS)
Target Audience:
Owners of 2004-2007 Honda FourTrax Rancher 400 AT (TRX400FA/TRX400FGA) seeking to perform maintenance, repairs, and diagnostics. Also useful for professional technicians.
Advantage:
Provides dealer-level repair information at a fraction of the cost. Instant download eliminates shipping delays and costs associated with physical manuals. Comprehensive and highly detailed, covering all aspects of the vehicle.
Manual Features:
Hundreds of original photographs and illustrations, step-by-step procedures, complete disassembly/reassembly guides, troubleshooting sections, and technical specifications.
Powertrain:
Engine Removal/Installation, Cylinder Head/Valve/Camshaft, Cylinder/Piston, Centrifugal Clutch, Alternator/Starter Clutch, Sub-Transmission/Gearshift Linkage, Crankshaft/Automatic Transmission (Hondamatic), Front Driving Mechanism, Rear Driving Mechanism
Chassis And Body:
Frame, Body Panels, Exhaust System, Front Wheels/Suspension/Steering, Rear Wheels/Suspension, Brake System, Selectable 4WD System
Electrical And Fuel:
Fuel System, Lubrication System, Battery/Charging System, Ignition System, Electric Starter, Lights/Meters/Switches, Wiring Diagram
Maintenance:
Scheduled Maintenance, Tune-Ups, Lubrication Schedule, Fluid Checks and Changes (Engine Oil, Gear Oil, Coolant)
Repair:
Complete Overhaul procedures for engine, transmission, drivetrain, suspension, brakes, and electrical components. Detailed repair instructions for specific parts and systems.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, including error code interpretation (if applicable for the era), no-spark diagnosis, starting problems, and performance issues.
Depth:
Highly Detailed, covering complete disassembly and reassembly. Suitable for novice DIY mechanics to experienced professionals. Includes hundreds of original photographs and illustrations.
Engine Type:
Liquid-cooled, 4-stroke, OHC, 4-valve, Unicam
Bore X Stroke:
85 mm x 70 mm
Horsepower:
Approximately 22-25 HP (Specific figures vary slightly by year and testing method, details within manual)
Torque:
Detailed torque specifications for all engine fasteners are provided in the manual.
Carburetor:
34 mm Constant Velocity (CV) Carburetor (Specific model: Keihin, details on jetting and adjustments in manual)
Fuel Type:
Unleaded gasoline, 86 octane minimum
Oil Type:
SAE 10W-40 API SG or higher. Specific Honda recommendations available in manual.
Oil Capacity:
Details on oil capacity for engine and transmission are provided.
Ignition Type:
CDI (Capacitor Discharge Ignition) with electronic advance
Cooling Method:
Liquid-cooled
Coolant Type:
Honda Motorcycle Coolant or equivalent. Details on mixture ratio and capacity provided.
Transmission Type:
Automatic transmission with torque converter and electronic shifting (Hondamatic)
Gear Selection:
Trax (Drive), Neutral, Reverse
Drive System:
Shaft drive
Selectable 4Wd:
Yes, electronically selectable 2WD/4WD
Transmission Fluid:
Honda ATV Specific Transmission Fluid or equivalent. Manual specifies type and capacity.
Overall Length:
Approximately 77.7 inches (1973 mm)
Overall Width:
Approximately 45.1 inches (1145 mm)
Overall Height:
Approximately 45.5 inches (1156 mm)
Wheelbase:
Approximately 50.6 inches (1285 mm)
Dry Weight:
Approximately 560 lbs (254 kg)
Curb Weight:
Approximately 593 lbs (269 kg)
Fuel Capacity:
3.1 US gallons (11.7 Liters), including 0.7-gallon reserve
Towing Capacity:
Not specified for towing by Honda, intended for off-road use and hauling.
Front Tire Size:
AT25 x 8-12
Rear Tire Size:
AT25 x 10-12
Front Suspension Type:
Independent Double-Wishbone with adjustable spring pre-load
Rear Suspension Type:
Independent Double-Wishbone with adjustable spring pre-load
Safety Standards:
Complies with ANSI/SVIA standards for recreational ATVs.
Braking System:
Front: Dual 180 mm hydraulic discs. Rear: Single 210 mm hydraulic disc with sealed mechanical drum parking brake. Details on pad replacement, fluid types (DOT 3 or 4), and bleeding procedures are in the manual.
Lighting:
Twin 30W headlights, 15W taillight/brake light. Specific bulb types and replacement procedures within the manual.
Frame Construction:
Steel frame with durable plastic body panels. Frame inspection and repair guidance within the manual.
Gps System:
The TRX400FGA model includes an integrated GPS navigation system. The manual covers its operation and basic troubleshooting.
Selectable 4Wd:
Electronic engagement of 2WD or 4WD system via handlebar-mounted buttons.
Wiring Diagram:
Comprehensive wiring diagrams are included, essential for diagnosing electrical issues and understanding component relationships.
Engine Oil Change:
Every 600 miles (1000 km) or 6 months. Manual provides detailed procedure and oil filter part number (e.g., 15410-MFJ-001).
Air Filter Cleaning:
Every 100 miles (160 km) or 2 months. Replacement interval typically every 12 months or as needed.
Spark Plug Replacement:
Approximately every 4000 miles (6400 km) or 24 months. Manual specifies spark plug type (e.g., CR7EH-9, NGK) and gap.
Valve Clearance Adjustment:
Every 1200 miles (2000 km) or 12 months. Manual provides precise cold clearance specifications (e.g., Intake: 0.10 mm, Exhaust: 0.12 mm).
Engine Oil Viscosity:
SAE 10W-40
Brake Fluid Type:
DOT 3 or DOT 4
Coolant Type:
Honda Motorcycle Coolant or equivalent (50/50 mix with distilled water)
Common Problems:
Potential issues include wear on the automatic transmission clutches, starter motor issues, and charging system problems. The manual provides troubleshooting steps for these and other potential concerns.
