Market Position:
The Honda FourTrax 300 series was a highly popular and rugged utility ATV, known for its reliability and go-anywhere capability. This manual serves enthusiasts and professionals looking to maintain, repair, or restore these iconic machines.
Competitive Analysis:
Competed against other mid-size utility ATVs from manufacturers like Yamaha (Kodiak, Big Bear), Kawasaki (Bayou), and Suzuki (King Quad) during its production run. The FourTrax 300 was often praised for its robust build and simpler, more mechanical design compared to some competitors.
Key Features:
Long-lasting durability, versatile for work and recreation, available in 2WD and 4WD configurations, strong aftermarket support.
Engine Systems:
Engine overhaul, cylinder head, piston, crankshaft, valve train, lubrication, cooling, starting system, ignition system, fuel system (carburetor and PGM-FI for later models if applicable)
Drivetrain Systems:
Transmission, drive shafts, axles, differentials (4x4 models), clutch, primary reduction gear
Suspension Systems:
Front forks (including hydraulic and spring components), rear suspension (swingarm, shock absorber, linkage)
Braking Systems:
Front and rear brakes (drum or disc depending on specific model year/variant), hydraulic systems, brake pads, rotors
Electrical Systems:
Wiring diagrams, lighting, charging system (stator, rectifier, battery), starter motor, ignition coil, switches, sensors
Bodywork And Chassis:
Frame, body panels, fenders, fuel tank, seat, handlebars, footpegs
Maintenance Procedures:
Scheduled maintenance, oil changes, filter replacements, spark plug service, brake adjustments, chain lubrication, coolant replacement
Troubleshooting Procedures:
Diagnostic charts, common problem identification (e.g., no spark, starting issues, engine performance problems), error code interpretation (if applicable)
Repair Procedures:
Complete engine tear down and rebuild, transmission overhaul, suspension component replacement, brake caliper service, electrical component repair
Installation Procedures:
Installation of common replacement parts, accessory installation guides (if covered)
Specific Repair Tasks:
Carburetor adjustment, idle speed setting, fuel pump testing, ignition timing checks, starter system diagnostics, final drive inspection and service.
Technical Depth:
Comprehensive, covering complete tear down and rebuild, detailed diagnostic information, and precise specifications
Included Diagrams:
Picture and part diagrams included
Torque Specifications:
Torque specs included for critical fasteners
Engine Type:
4-stroke, OHV, Air-cooled
Displacement:
282 cc (approximate)
Bore X Stroke:
75.0 mm x 63.0 mm (typical)
Compression Ratio:
8.5:1 (typical)
Horsepower:
Approximately 19-20 HP (varies slightly by year)
Torque:
Not explicitly listed but robust for its class
Fuel System:
Carburetor (Keihin) for most models. Some later models or specific variations might have PGM-FI (Programmed Fuel Injection) for certain markets, though the primary focus here is carburetor-equipped.
Carburetor Type:
Single Keihin carburetor (e.g., PD78)
Fuel Type:
Unleaded gasoline
Oil Type Specification:
SAE 10W-30 API SE or SF (refer to manual for exact grade and specification for specific conditions)
Oil Capacity:
Approx. 1.8 L (1.9 US qt) with filter change
Length:
Approx. 74.4 inches (1890 mm)
Width:
Approx. 42.9 inches (1090 mm)
Height:
Approx. 40.3 inches (1025 mm)
Dry Weight:
Approx. 443 lbs (201 kg) for 2WD, 476 lbs (216 kg) for 4x4
Curb Weight:
Not specifically listed but generally around 450-480 lbs
Fuel Tank Capacity:
2.4 US gallons (9.0 L), including 0.7-gallon reserve
Towing Capacity:
Not officially specified but capable of light towing
Wheelbase:
Approx. 47.4 inches (1205 mm)
Ground Clearance:
Approx. 6.7 inches (170 mm)
Safety Ratings:
N/A (ATVs are not subject to the same safety rating systems as passenger vehicles)
Active Features:
Disc brakes (front on some models, rear drum or disc), intuitive controls, 4WD engagement (on 4x4 models)
Passive Features:
Heavy-duty frame, integrated floorboards, handlebar guards, durable bodywork
Engine Oil Change Interval:
Every 1,000 km (600 miles) or 6 months, whichever comes first (refer to manual for exact schedule)
Spark Plug Replacement Interval:
Refer to manual, typically around 4,000 km (2,500 miles)
Valve Clearance Adjustment Interval:
Every 2,000 km (1,200 miles)
Coolant Type:
Honda Antifreeze/Coolant (Type 1) or equivalent permanent type antifreeze
Brake Fluid Type:
DOT 3 or DOT 4
Common Issues:
Carburetor gumming/fouling (if not used regularly), occasional electrical connector issues, starter solenoid wear, rear axle seals.
Preventative Maintenance Tips:
Regularly clean air filter, use fuel stabilizer if stored for extended periods, check tire pressures, inspect for leaks.
Brand Heritage:
Honda has a long-standing reputation for building reliable and durable ATVs, dating back to the early days of the sport with models like the ATC series. The FourTrax line continued this legacy.
Model Evolution:
The TRX300/300FW was an evolution of Honda's successful mid-size utility ATV platform. It maintained a consistent, proven design throughout its production run, with minor updates in styling and potentially some internal component refinements.
Production Period:
1995-2000. This generation was succeeded by the TRX350 Rancher, which introduced more advanced features and styling.