Honda FourTrax Rancher 350 ATV Service Manual, 2004–2006 (TRX350TM/TE/FM/FE)

This service manual covers maintenance and repair for the 2004–2006 Honda FourTrax Rancher TRX350TM, TRX350TE, TRX350FM, and TRX350FE. It covers mechanical teardown, driveline work, chassis service, and electrical diagnostics while keeping the 2WD/4WD and foot-shift/ESP versions separate wherever procedures or specifications differ.

PDF Bookmarks, Text Search and Page Count

Navigation and wiring detail: Embedded bookmarks provide access to the chapters and individual wiring diagrams. The service pages do not support text search. Small wiring labels require enlargement; some fine lettering remains soft when zoomed.

Supplied as one printable 442-page PDF in English: 441 manual pages, including 11 memo pages, plus one added cover.

Engine, Driveline and ESP Service

The following selected coverage highlights the main repair areas. Other topics include spark-arrester cleaning and reverse-lock system inspection.

• Engine repair: Compression testing, cylinder-head and valve service, cylinder/piston inspection, camshaft work, crankcase separation, and crankshaft/balancer inspection.

• Clutch and transmission: Centrifugal and change-clutch service, gearshift linkage repair, transmission disassembly, shaft and gear inspection, and crankcase-bearing replacement.

• Front and rear driveline: FM/FE front drive-shaft and differential service, rear axle repair, final-drive disassembly, bearing replacement, backlash checks, and gear-contact inspection.

• Brakes and chassis: Front hydraulic drum-brake service and bleeding, rear mechanical drum-brake repair, wheel bearings, steering, suspension arms, shock absorbers, and swingarm service.

• Fuel and lubrication: Carburetor disassembly and inspection, float-level checks, pilot-screw and high-altitude settings, oil-pump service, oil-cooler work, and cooling-fan procedures.

• Electrical diagnosis: Battery and charging-system tests, ignition checks, starter-motor repair, relay and diode testing, lighting circuits, meters, switches, and wiring diagrams.

• Electric Shift Program: TE/FE diagnostic tables, problem-code checks, ECU circuit tests, angle-sensor inspection, control-motor and reduction-gear service, and shift-switch testing.

Suited to mechanics and mechanically qualified owners with the specified tools and test equipment; the maintenance schedules recommend dealer service for certain wheel and steering checks.

Engine Teardown and Variant-Specific Clutch Work

Top end: Step-by-step instructions cover valve-guide replacement, valve-seat inspection/refacing, and camshaft removal and installation. Inspection data extends to rocker arms, push rods, cam followers, cam-chain components, and cylinder/piston wear.

Internal repair: Transmission measurements cover shift forks, gear bushings, the mainshaft, countershaft, reverse-idle shaft, and running clearances. Camshaft, transmission, and crankshaft/balancer service require engine removal.

The alternator stator, flywheel, and starter clutch can alternatively be accessed by removing the swingarm when no additional engine work is needed. Recoil-starter service is also included.

Clutch differences: The TE/FE change clutch uses a different spring specification and includes disc B, a judder spring, and a spring seat. The manual separates these arrangements from the TM/FM assembly rather than treating every clutch pack alike.

Carburetor, Oil Pump and Cooling

Carburetor procedures cover the starting-enrichment valve, air cut-off valve, vacuum chamber, diaphragm/vacuum piston, jets, and float valve. The float-level inspection identifies a fixed float assembly that requires replacement if its level is out of specification.

Pilot-screw coverage includes the idle-drop procedure and high-altitude settings. The pilot screw can damage its precision seat if tightened against it.

The longitudinal OHV engine uses forced-pressure dry-sump lubrication with an integral oil tank in the crankcase. Oil-pump coverage separates feed and scavenge functions and includes relief-valve inspection, oil passages, and cooler connections.

The Oil Management System Drawing and Lubrication System Diagram explain that arrangement. Lubricant specifications include SAE 10W-40 oil meeting API SG or higher and JASO MA, with SAE #80 hypoid gear oil specified for the driveline housings.

Differential, Final Drive and Chassis

Driveline setup: FM/FE differential coverage includes A.P. Suretrac construction and operation drawings, limited-slip torque inspection, face-cam and cam-follower checks, and shim selection. Both the front differential and rear final drive have backlash, tooth-contact, pinion-bearing, and case-bearing procedures.

Front drive-shaft instructions distinguish the serviceable inboard joint from the outboard joint, which cannot be disassembled. A worn or damaged outboard joint requires drive-shaft replacement.

Steering and suspension: Coverage includes double-wishbone front suspension, steering-shaft and tie-rod service, wheel hubs and knuckles, suspension-arm ball joints, and swingarm pivots. Hub-bearing procedures differ between TM/TE and FM/FE, and rear shock-absorber inspection distinguishes lower-pivot bearing and bushing arrangements.

The swingarm section separates the lightly tightened right pivot bolt from its locknut; confusing their specifications can overload the pivot and bearings.

Brake and body access: Front master-cylinder and wheel-cylinder procedures accompany drum, shoe, brake-panel, and waterproof-seal inspection. Rear coverage includes the brake cam, cables, pedal, and drum assembly.

Body procedures identify the seat, side covers, utility box, fuel tank cover, center and front mud guards, front carrier/carry pipe, rear carrier, fenders, tool box, headlight and taillight grills, and exhaust system. Cable & Harness Routing views support reassembly.

Electrical Fault Tracing and ESP Tests

Charging diagnosis separates battery condition, current leakage, alternator charging-coil faults, and regulator/rectifier circuits. Ignition coverage includes peak-voltage tests and timing inspection; ignition timing is factory preset and cannot be adjusted.

The Electric Starter System Diagram supports starter-motor, relay, and diode checks. Further tests cover handlebar and brake-light switches, combination-meter functions, gear-position and vehicle-speed sensors, carburetor-heater circuits, and the oil-temperature indicator and cooling fan.

TE/FE shift faults: The ESP Component Diagram links the ECU, control motor, angle sensor, gear-position switch, speed sensor, reverse shift switch, gearshift switch, and ignition pulse generator. Diagnostic tables and flowcharts cover problem-code retrieval and clearing alongside component and harness checks.

Separate wiring diagrams cover the U.S.A. TM, U.S.A. FM, U.S.A./Canada/World TE/FE, and Canada/World TM/FM configurations.

For ESP shift faults, driveline noise, low compression, clutch slippage, or charging trouble, the model-specific tests and service limits let you compare findings with the specified condition before selecting replacement parts.

Service Tables and Workshop Precautions

Standard fastener and component-specific torque tables accompany fluid capacities, carburetor settings, electrical test values, connector checks, wear limits, and clearances. Assembly notes identify locking agents, replacement locknuts, staking, castle-nut alignment, and treated threads; special-tool references cover clutch holders, pullers, and bearing-service equipment.

Before repair work, follow the manual's job-specific safety notes: support the ATV securely before wheel or suspension service, isolate the battery before starter-circuit disassembly, keep fuel-system work away from flames or sparks, and prevent contamination when servicing the DOT 4 hydraulic brake system.

Electrical diagnostics that require live measurements should be performed only under the test conditions specified in the manual.

A Preview of Valve Settings and Engine Wear Limits

Intake and exhaust valve clearance is specified at 0.15 ± 0.02 mm with the engine cold, below 35°C/95°F. The valve-clearance section connects that setting with its inspection and adjustment procedure.

Cylinder inspection gives a bore service limit of 78.60 mm. Crankshaft inspection specifies a 0.05 mm runout limit and a separate 0.05 mm service limit for connecting-rod big-end radial clearance, with illustrations showing the measurement arrangements.