1988-1994 Honda Fourtrax 300 / TRX300FW Service Manual

Complete service and repair information for Honda Fourtrax 300 and TRX300FW models (1988-1994). Includes detailed procedures for engine, chassis, and electrical systems. Part number 88-94 TRX300.

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Document Details

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Document Number / Seller:
29496 / Donna Cooper
File Size:
39.14 MB
File Type:
PDF
Language:
English
Pages:
360
Printable:
Yes
Category:
ATV
Last updated / verified
Oct 13, 2025

Models Covered & Key Technical Specifications

Honda Fourtrax 300 (88-94 TRX300 / 88, 90-94 TRX300FW) Manual-Nexus Honda Fourtrax 300 (88-94 TRX300 / 88, 90-94 TRX300FW) | Service Manual

  • Engine Cooling Data: 2.5 liters is the specified coolant capacity for optimal thermal regulation.
  • Fuel Reserve Capacity: For extended operation, 0.5 gal defines the reserve fuel availability.
  • Carburetor Jetting Specifications: The VE90C carburetor requires 125 main jet for standard performance settings.
  • Front Tire Pressure: For optimal handling, 2.9 psi (0.20 kg/cm2) is the recommended front tire pressure.
  • Rear Suspension Travel: The rear suspension system supports 9.0 x 23 mm range of motion for varied terrain.
  • Battery Voltage: The electrical system requires 12 V for reliable operation.

Professional Workshop Service Manual & Technical Specifications

Honda Fourtrax 300 (1988-1994) Service Manual: Comprehensive Maintenance & Repair Guide

Service-Nexus: 1988-1994 ATV / Honda Fourtrax 300 Logic // Technical-Documentation: Service Manual

Service-Nexus Rating Validation-Data
General Information Comprehensive Detailed Diagrams
Engine Systems In-depth Analysis Component Schematics
Maintenance Schedules Routine Checks Preventative Care
Troubleshooting Guide Diagnostic Aids Repair Solutions
Torque Specifications Precision Values Assembly Accuracy

Integrated service sections encompass engine removal and installation, cylinder head and valve service, and complete transmission overhauls. This manual meticulously documents procedures for carburetor adjustments, including pilot screw settings and high-altitude tuning, ensuring optimal performance across diverse operating conditions. It details the intricate workings of the fuel system, from tank removal to carburetor disassembly and reassembly, providing clear instructions for maintenance and repair. The comprehensive guide also covers electrical system diagnostics and repair, including battery charging, starter systems, and wiring diagrams. Specifically, it details the front wheel, suspension, and steering systems, offering guidance on tie-rod and knuckle installation, as well as front shock absorber servicing. The manual provides detailed procedures for handling the handlebar assembly and throttle housing, alongside front wheel and brake drum servicing. Additionally, it offers in-depth coverage of the steering shaft, front shock absorber, and suspension components, ensuring a complete understanding of the vehicle's dynamics. Within its pages, specific chapters are dedicated to engine, cylinder, and piston service, providing detailed specifications and troubleshooting advice. The manual addresses clutch and oil pump operations, kick starter mechanisms, and the intricate gearshift linkage. It thoroughly covers the crankcase, crankshaft, and transmission, offering detailed exploded views and assembly instructions. Procedures for the alternator, starter clutch, and gearshift linkage are also clearly outlined, facilitating efficient maintenance. The document includes coverage of engine oil and filter changes, fuel tank maintenance, and air cleaner element servicing. Brake system specifications are included for both front and rear brakes, ensuring reliable stopping power. Safety procedures are documented for various maintenance tasks, emphasizing safe working practices. Fluid capacities are listed for engine oil, front differential, rear final drive, and front gear case, ensuring proper lubrication. Tool requirements are listed for specialized tasks, aiding in efficient repair work. Detailed diagrams and exploded views are provided for all major components, aiding in identification and assembly.

This manual documents torque specifications for critical engine and chassis components to ensure proper gasket seal integrity.

FAQ

Check the **standard** spark plug gap keyboard_arrow_down

0.8–0.9 mm (0.031–0.035 in) is the standard gap for the spark plug, applicable to models with standard ignition.

What does the **necessary** adjustment procedures entail for the pilot screw? keyboard_arrow_down

For the pilot screw, adjustment involves turning it approximately 1-3/4 turns for '88-'92 models and 1/2 turn for '92 and later models, after seating.

Reference the **recommended** oil capacity for the front differential. keyboard_arrow_down

100 cc (3.4 oz) at disassembly is the recommended oil capacity for the front differential (TRX300FW) before fluid changes.

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The manual is incredibly detailed and easy to follow. I was able to troubleshoot my ATV issues with ease!