1998-2001 Honda TRX450S / TRX450ES Foreman ATV Factory Service Manual
Honda Models Covered & Key Technical Specifications
Models: Honda TRX450S Fourtrax Foreman, Honda TRX450ES Fourtrax ForemanES
Sub-models / Variants: TRX450S, TRX450ES
Model 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
Honda Manual Features & Content Preview
Technical Specifications and Coverage Overview: 1998–2001 Honda TRX450S & TRX450ES
- 424-page official OEM publication covering the 1998–2001 Honda TRX450S (manual-shift) and TRX450ES (electric-shift) Fourtrax Foreman ATVs.
- Contains 25 categorized sections detailing engine parameters, chassis, electrical components, and fuel-injection data for the complete production run.
- Serves as the primary reference for maintenance intervals and professional repair shop workflows.
- Instant download grants immediate access to the files the moment your payment clears.
- Fully searchable document format allows you to locate specific part numbers in seconds, laid out perfectly for standard letter and A4 printing.
- Stored securely in your account for permanent retrieval in the event of a hard-drive loss.
Component and System Documentation
The 1998–2001 Honda TRX450S and TRX450ES service manual organizes technical procedures across twenty-five distinct chapters designed specifically for workshop use. It provides a comprehensive breakdown of the entire machine. Technicians will find precise documentation for frame and body panel locations, exhaust routing, and complete engine architecture. Detailed sections outline the clutch mechanism, gearshift linkage, and the highly specific electric shift program used in the ES variant. Because ATV maintenance inherently involves heavy machinery and combustible fluids, always observe standard shop safety protocols and wear appropriate protective gear before beginning any work. To streamline electrical troubleshooting, comprehensive wiring diagrams and system specifications for the charging unit and starter are provided for both models.
Specification and Reference Data
Specialized chapters focus heavily on suspension geometry, steering mechanisms, and braking hardware. Fuel system parameters are thoroughly outlined for the CV-type carburetor. Engine performance data for the 432.6 cc powerplant is documented in the general information section, alongside scheduled maintenance intervals and precise fluid capacities. For the ignition system, the spark plug gap is strictly specified at 0.8–0.9 mm. Mechanics relying on accurate assembly data will benefit from the provided torque values for critical fasteners, including the cylinder head and clutch assembly. Furthermore, detailed tolerance charts for valve clearances and piston dimensions assist in evaluating wear limits during extensive repair procedures or routine overhauls.
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