1998-2001 Honda TRX450S / TRX450ES Foreman ATV Service Manual

Technician-level documentation for Honda TRX450S and TRX450ES ATVs, covering 1998-2001 models. Detailed diagrams and procedures for comprehensive maintenance and repair. Includes part numbers.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Honda Models Covered & Key Technical Specifications

Models: Honda TRX450S Fourtrax Foreman, Honda TRX450ES Fourtrax ForemanES
Sub-models / Variants: TRX450S, TRX450ES
Build Years: 1998–2001
Technical Data:

  • Engine displacement: 432.6 cc
  • Engine type: Air-cooled, single-cylinder, 4-stroke
  • Bore and stroke: 90.0 x 68.0 mm
  • Compression ratio: 8.5:1
  • Transmission: 5-speed with reverse
  • Fuel system: CV (Constant Vacuum) type carburetor
  • Ignition system: DC-CDI
  • Spark plug: DPR7EA-9 (Standard), DPR6EA-9 (Cold), DPR8EA-9 (High speed)
  • Engine oil capacity: 2.0 liters (draining), 2.7 liters (disassembly), 2.1 liters (filter change)
  • Idle speed: 1,400 ± 100 rpm
  • Front tire: AT 25 x 8-12
  • Rear tire: AT 25 x 10-12
Technical Specifications
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Document Number / Seller:
29655 / Robert Thompson
File Size:
39.73 MB
File Type:
PDF
Language:
English
Pages:
424
Printable:
Yes
Category:
ATV
Last updated / verified
Feb 24, 2026

Honda Manual Features & Content Preview

Technical Scope of the 1998–2001 Honda TRX450S and TRX450ES

  • Covers 1998–2001 Honda TRX450S and TRX450ES Fourtrax Foreman ATV models, including the manual-shift TRX450S and electric-shift TRX450ES variants
  • Original OEM publication, Honda Service Publication Office, copyright date of initial publication 1998
  • Contains 25 categorized sections including frame/body panel removal, engine disassembly, suspension, and electrical system diagnostics
  • Access the digital content the moment payment clears
  • Stored against your account so you can retrieve it after a hard-drive loss
  • Full-text search finds any part number in seconds
  • Laid out for standard letter and A4 printing
  • This 424-page factory manual serves as the primary technical reference for the 1998–2001 Honda Foreman series maintenance and service intervals

Component and System Documentation

The 1998–2001 Honda TRX450S and TRX450ES service manual organizes technical procedures across twenty-five distinct chapters, covering the entire machine. The text documents frame and body panel locations, exhaust system removal, and complete engine disassembly. Sections detailing the clutch, gearshift linkage, and electric shift program are included. Wiring diagrams and electrical system specifications for the charging system and starter are provided for both models. Specialized chapters focus on the suspension, steering, and braking mechanisms, while fuel system service is detailed for the CV-type carburetor.

Specification and Reference Data

Engine performance data for the 432.6 cc engine is documented in the general information section, with maintenance schedules and fluid capacities provided. Spark plug gap is specified at 0.8–0.9 mm in the ignition system specifications. Torque values for engine fasteners, including the cylinder head and clutch assembly, are provided for correct assembly. Detailed tolerance charts for valve clearance and piston dimensions assist in evaluating wear limits. Owners can utilize what an OEM service publication covers to determine necessary maintenance intervals for the air cleaner and lubrication systems.

Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions. An official 424-page Honda OEM workshop manual covering the 1998–2001 TRX450S and TRX450ES Foreman, documenting engine, chassis, electrical, and fuel-injection specifications for the full production run.

Manual FAQ, Purchase & Download Details

Does this document include specific edition or publication references for the Honda TRX450S and TRX450ES ATV models? keyboard_arrow_down

Manual is an official service publication covering the 1998-2001 Honda TRX450S and TRX450ES models and contains detailed information provided by the Honda Motor Co., Ltd. Service Publication Office.

What kind of component breakdown diagrams are included for the various mechanical systems? keyboard_arrow_down

Document contains numerous exploded views and parts illustrations throughout its 424 pages to assist with identifying the assembly of engine, drivetrain, and chassis components. These visual guides support the system coverage detailed across the 25 primary sections of the manual.

Which sections of the manual provide reference data for the electrical systems, including wiring diagrams and connector information? keyboard_arrow_down

Electrical system chapters, specifically sections 17 through 22, include wiring diagrams, charging system specifications, and ignition system reference values.

Can I find technical data like torque specifications and clearance tolerances within the specification tables? keyboard_arrow_down

General information section of the manual includes comprehensive specification tables that list standard service values, tightening torque ranges for fasteners, and recommended fluid capacities. These tables cover critical tolerances for the engine, drivetrain, and chassis to provide a complete technical reference. Additionally, the manual organizes these specifications by system, making it easy to locate the data relevant to the specific vehicle components.

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