Honda FourTrax Rancher AT TRX400FA/FGA Owner's Manual 2005–2006 (P/N 31HN7620)

This Honda Motor Co., Ltd. owner's manual is the 2006 edition (P/N 31HN7620) for the FourTrax Rancher AT TRX400FA and TRX400FGA. The TRX400FGA is the GPScape-equipped model.

Printable PDF and Page Index

Text search and navigation: The PDF has no built-in text search or embedded bookmarks. Use the manual's contents pages and alphabetical index to locate topics.

One printable, English-language 286-page PDF, including 272 numbered manual pages, nine front-cover and introductory pages, four Quick Reference pages, and one back cover.

Riding Controls, GPScape, and Scheduled Maintenance

These selected topics show what the manual covers. Other sections explain pre-ride inspections and how to check driveshaft boots for damage or leaking grease.

• Drive controls: AUTO and ESP shifting, 2WD/4WD selection, reverse operation, electric and recoil starting, and oil change indicator reset.

• GPScape navigation: Satellite status, position-fix recovery, waypoint marking, coordinate entry, compass direction display, and automatic clock adjustment for the TRX400FGA.

• Fluids and filtration: Engine oil and filter replacement, rear final gear case and front differential oil changes, foam air cleaner service, and air cleaner housing drain-tube cleaning.

• Engine adjustments: Throttle freeplay inspection and adjustment, choke cable checks, idle speed adjustment, spark plug inspection and replacement, and spark arrester cleaning.

• Brakes and tires: Front brake lining clearance adjustment, rear brake pedal and lever freeplay checks, shoe-wear inspection, and emergency wheel removal and installation.

• Battery and fuses: Battery removal, installation, storage, and charging, plus fuse-box views and replacement guidance for the main, shift motor, and circuit fuses.

• Troubleshooting: Symptom tables for starting and poor running, with guidance on transmission warnings, high oil temperature, and a weak or dead battery.

The manual covers everyday operation and routine service for ATV owners with basic mechanical skills and hand tools. Some scheduled work requires advanced skills, tools, and the separate Honda Service Manual.

Controls, Starting, and Towing

Control illustrations identify the starting primer knob, choke knob, throttle lever, engine stop switch, and parking brake lock lever. Separate multi-function display views show the FA and FGA layouts. The shift lever illustration identifies Drive, Neutral, and Reverse.

Starting instructions cover a flooded engine and recoil starting when the battery is low. The accessory socket section gives its electrical rating and operating conditions. Trailer hitch and loading guidance distinguishes rack loads, total towing weight, and recommended tongue weight.

GPScape Satellite Status and Waypoints

The satellite-status illustrations show how to distinguish an unavailable fix from 2D and 3D navigation. The startup section covers what to check when GPScape cannot acquire a position.

Waypoint instructions explain how to mark your current location or enter a destination's latitude and longitude. The GPS Mode Display shows straight-line distance and direction to the waypoint. The Compass Direction Indicator section explains why heading requires the ATV to be moving.

Routine Maintenance and Repair Scope

The maintenance schedule identifies which items need more frequent attention in dusty, wet, or muddy conditions. The oil filter illustration identifies the cover, spring, washer, and O-rings. Incorrect filter installation can damage the engine, and wringing out the foam air cleaner can tear it.

The owner's manual gives valve clearance as a reference and directs readers to the separate Honda Service Manual for valve adjustment and high-altitude jet installation. Internal engine and transmission repairs require the separate service publication.

Storage instructions cover fuel-system preparation, battery storage, and return-to-service checks. Transport illustrations show the ATV tie-down points.

Drum Brakes, Flat Tires, and Starting Checks

The brake section distinguishes the hydraulic front drums from the mechanical rear drum. It includes a rear brake wear-indicator drawing and a check for water in the brakes. Honda directs owners to a dealer for brake bleeding and shoe replacement.

The tire section explains when a temporary plug can be used and when the tire needs professional repair or replacement. The emergency wheel installation section shows wheel-nut orientation and gives the tightening specification.

The starting tables give different checks for a starter that stays silent and one that turns the engine without starting it. That distinction helps owners select the right checks before arranging a repair.

Use appropriate protective equipment and support the ATV securely for brake or wheel work. Follow the manual's maintenance safety precautions.

Selected Oil Service and Front Brake Lining Specs

The engine oil and filter service section specifies a refill of 3.0 US qt (2.8 L) after draining and gives an engine oil drain-bolt torque of 18 lbf-ft (25 N·m).

For the front drum brakes, Honda lists 0.16 in (4.0 mm) as the standard shoe lining thickness and 0.04 in (1.0 mm) as the service limit. The inspection section explains when lining wear calls for replacement and when to check the lining clearance.