Target User:
Honda FourTrax 350 4x4 owners (1986-1987) seeking to perform repairs, maintenance, or restoration.
Value Proposition:
Provides dealer-level service information, enabling significant cost savings on repairs and maintenance compared to professional shop labor.
Comprehensiveness:
Covers every aspect of the ATV's systems, from minor maintenance to complete engine rebuilds.
Usability:
Printable pages allow for convenient use in a workshop or garage environment.
Accuracy:
Official factory service manual content ensures accuracy and adherence to manufacturer specifications.
Engine:
Complete overhaul, diagnosis, repair of all engine components
Fuel System:
Carburetor tuning, fuel pump, fuel lines, fuel tank maintenance
Cooling System:
Radiator, coolant, hoses, water pump service
Lubrication System:
Oil pump, oil passages, lubrication schedules, fluid specifications
Ignition System:
Magneto, ignition coil, spark plug diagnosis and replacement
Electrical System:
Battery, charging system (stator, rectifier/regulator), starter motor, lighting, switches
Transmission Drivetrain:
Gearshift linkage, clutch, crankcase, transmission internals, front differential, final drive
Suspension Steering:
Front and rear suspension, shocks, springs, steering components, triple trees
Brakes:
Front and rear brake systems, hydraulic components, pad replacement, adjustments
Body Chassis:
Bumpers, fenders, carriers, plastics, frame inspection
Routine Maintenance:
Scheduled maintenance, fluid changes, filter replacements, adjustments
Troubleshooting:
Diagnostic procedures for common and uncommon problems, error code interpretation (if applicable)
Disassembly Assembly:
Complete tear down and reassembly of all major components and systems
Rebuilding Refurbishment:
Detailed instructions for rebuilding engine, transmission, carburetor, etc.
Electrical Diagnostics:
Wiring diagrams, component testing, troubleshooting electrical faults
Torque Specifications:
Precise torque values for all critical fasteners
Depth Level:
Factory-level detail, suitable for professional technicians and advanced DIY mechanics
Diagnostic Tools:
Implied usage of standard automotive diagnostic tools
Schematics Diagrams:
Detailed wiring diagrams, exploded views, and part diagrams
Engine Type:
Four-stroke, OHC, Air-cooled
Bore X Stroke:
70.0 mm x 89.6 mm (approximate, as per common specs for this model)
Compression Ratio:
8.5:1 (typical for this era/model)
Horsepower:
Estimated 20-22 HP (specific figures may vary, manual will confirm)
Torque:
Torque specifications will be detailed in the manual for various engine components.
Carburetor Type:
Single Carburetor (e.g., Keihin) with specific model number detailed in manual.
Fuel Delivery:
Gravity feed via fuel petcock from fuel tank.
Recommended Oil Viscosity:
SAE 10W-30 (typical for air-cooled engines in varied temperatures, manual will specify exact range)
Oil Capacity:
Specific oil capacity (e.g., 2.3 US qt / 2.2 L) will be detailed in the manual.
Transmission Type:
5-speed manual with automatic clutch and reverse.
Clutch Type:
Automatic centrifugal clutch.
Drive System:
Shaft drive, 4x4 (selectable or full-time, manual will clarify).
Final Drive:
Front and Rear differentials with specific gear ratios detailed in the manual.
Overall Length:
2065 mm (approximate, manual will provide exact)
Overall Width:
745 mm (approximate, manual will provide exact)
Overall Height:
1025 mm (approximate, manual will provide exact)
Dry Weight:
209 kg (approximate, manual will provide exact)
Fuel Capacity:
3.0 US gal (approximate, manual will provide exact)
Infotainment System:
N/A (This is a 1980s utility ATV, no advanced infotainment features expected).
Driver Assistance Features:
N/A (This is a 1980s utility ATV, no driver assistance features expected).
Connectivity Options:
N/A (This is a 1980s utility ATV, no connectivity features expected).
Oil Change Interval:
Details on recommended oil change intervals based on usage hours or mileage will be provided in the manual.
Air Filter Cleaning:
Specific cleaning and replacement intervals for the air filter will be outlined.
Spark Plug Maintenance:
Recommendations for spark plug inspection, cleaning, and replacement intervals.
Valve Clearance Adjustment:
Specific mileage or time intervals for checking and adjusting valve clearances will be detailed.
Engine Oil:
SAE 10W-30 (confirmed as typical, manual provides definitive specification and capacity).
Transmission Gear Oil:
Specific gear oil type and viscosity will be listed in the manual.
Brake Fluid:
DOT 3 or DOT 4 (typical for hydraulic systems of this era, manual will specify exact type and replacement interval).
Coolant Type:
Anti-freeze coolant, specific type and mixture ratio will be detailed.
Common Wear Points:
Manual will provide guidance on wear items such as brake pads, suspension bushings, and drive components.
Carburetor Cleaning:
Regular carburetor cleaning and adjustment may be recommended due to potential fuel gumming over time.
Electrical Connections:
The manual will offer troubleshooting for potential issues with electrical connections and grounds.
Manufacturer:
Honda Motor Co., Ltd. is renowned for its quality, reliability, and innovation in powersports.
Fourtrax Lineage:
The FourTrax 350 4x4 was a significant step in Honda's development of capable and reliable all-terrain vehicles.
Production Period:
The TRX350 model was produced for the 1986 and 1987 model years, marking a key phase in ATV development.
