Segment:
Mid-size Utility ATV
Competitors:
Yamaha Grizzly 450, Kawasaki Brute Force 400, Polaris Sportsman 400/500 (early models).
Vehicle Strengths:
Reputation for reliability, durable solid rear axle design, comfortable ride, user-friendly operation, strong dealer network, availability of parts.
Value For Money:
Provides comprehensive DIY repair and maintenance capabilities, saving owners significant costs compared to dealership labor.
Engine:
Complete engine overhaul, diagnosis, tuning, fuel system (EFI/carburetor), ignition system, lubrication system, cooling system, exhaust system.
Transmission:
5-speed manual with reverse, Honda Automatic Transmission (AT) - *Note: Excludes AT models with Independent Rear Suspension (IRS)*, clutch system, drive train, primary reduction gear.
Chassis:
Frame, suspension (front forks, rear solid axle), steering system (including power steering where applicable), brakes (front and rear), wheels, tires, body panels, plastics.
Electrical:
Starting system, charging system (stator, rectifier, battery), lighting system, PGM-FI (Programmed Fuel Injection) system diagnostics, ignition system, wiring diagrams, troubleshooting electrical faults.
Specific Models Covered:
TRX420FA (4x4 with AT and Power Steering), TRX420FE (4x4 with Electric Shift), TRX420FM (4x4 with Manual Shift), TRX420TE (2x4 with AT and Power Steering), TRX420TM (2x4 with Manual Shift), TRX420FPA (4x4 with AT and Power Steering), TRX420FPM (4x4 with Manual Shift), TRX420FPE (4x4 with Electric Shift and Power Steering).
Excluded Models:
Honda Rancher 420 AT with Independent Rear Suspension (IRS).
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug checks, valve clearance adjustments, fluid level checks and top-offs, brake system maintenance.
Repair:
Complete teardown and rebuild procedures for all major components, engine repair, transmission repair, suspension repair, brake system repair, electrical component replacement, bodywork repair.
Troubleshooting:
Step-by-step diagnostic guides for common problems, error code interpretation (e.g., PGM-FI codes), 'no spark' issues, starting problems, performance issues, mechanical and electrical troubleshooting.
Installation:
Procedures for installing aftermarket parts, accessories, and performing component upgrades.
Depth:
Comprehensive from basic maintenance to complete engine and transmission overhauls. Includes detailed torque specifications, part diagrams, and diagnostic procedures.
Engine Type:
4-Stroke, OHV, Liquid-Cooled, Single-Cylinder
Bore X Stroke:
91.0 mm x 83.0 mm
Horsepower Estimated:
Approx. 28 hp @ 6000 rpm (specific rating may vary)
Torque Estimated:
Approx. 27 lb-ft @ 5000 rpm (specific rating may vary)
Fuel Delivery:
PGM-FI (Programmed Fuel Injection) or Carburetor (depending on specific model variant and year).
Fuel Type:
Unleaded gasoline (87 octane or higher recommended)
Engine Oil Type:
SAE 10W-40 (API SG or higher, JASO T903 standard)
Oil Capacity:
Approx. 1.7 US qt (1.6 L) (with filter change)
Cooling Method:
Liquid-cooled
Coolant Type:
Honda All Season Antifreeze/Coolant (1:1 mixture with distilled water)
Ignition System:
CDI Digital with electronic advance
Starter System:
Electric starter with auxiliary manual kickstarter (on some models).
Efi Vs Carburetor:
Manual covers both PGM-FI (electronic fuel injection) systems and carburetor-based fuel systems found across different TRX420 models and years. This includes detailed diagnostic procedures for EFI sensors and actuators.
Transmission Type:
5-speed manual with reverse
Automatic Transmission:
Honda Automatic Transmission (AT) - *Note: Excludes AT models with Independent Rear Suspension (IRS)*
Drive System:
Selectable 2WD/4WD (trax), often with Trax-Lock.
Final Drive:
O-ring sealed chain
Transmission Oil Type:
API GL-4 SAE 80 Hypoid Gear Oil (Honda recommends specific grades, check manual for exact part number/spec).
Transmission Oil Capacity:
Approx. 0.7 US qt (0.65 L)
Length:
Approx. 77.1 inches (1957 mm)
Width:
Approx. 46.5 inches (1180 mm)
Height:
Approx. 45.2 inches (1147 mm)
Wheelbase:
Approx. 49.9 inches (1268 mm)
Dry Weight:
Approx. 577 lbs (262 kg) for 2WD models, Approx. 606 lbs (275 kg) for 4WD models.
Curb Weight:
Varies by model/trim, generally around 600-630 lbs.
Towing Capacity:
850 lbs (386 kg)
Rack Capacity Front:
33 lbs (15 kg)
Rack Capacity Rear:
176 lbs (80 kg)
Atv Safety Standards:
Designed to meet ANSI standards for all-terrain vehicles.
Braking System:
Hydraulic disc brakes front and rear.
Parking Brake:
Mechanical parking brake.
Lighting:
Dual 30W headlights, 15W brake/taillight.
Ergonomics:
Designed for rider comfort and control, with features like power steering (on applicable models) to reduce fatigue.
Infotainment Features:
Typically basic instrumentation (speedometer, odometer, trip meter, fuel gauge). No advanced infotainment systems expected on this utility-focused model.
Power Steering:
Available as an option on specific 'P' models (e.g., TRX420FPe), significantly enhancing rider comfort and control, especially at low speeds and over rough terrain.
Connectivity Features:
N/A
Efi System:
PGM-FI on many variants, offering improved throttle response, fuel efficiency, and easier starting in varying conditions.
Engine Oil Change:
Every 600 miles or 6 months, whichever comes first.
Air Filter Cleaning:
Every 100 miles or 1 month, replace as needed.
Spark Plug Check:
Every 600 miles or 6 months.
Valve Clearance Check:
Every 600 miles or 6 months.
Transmission Oil Change:
Every 600 miles or 6 months.
Brake Fluid Type:
DOT 3 or DOT 4 (Check manual for specific Honda recommendation, e.g., Honda DOT 4 Brake Fluid).
Differential Oil Front Type:
Honda Pro-Honda HP Gear Oil (or equivalent SAE 80 hypoid gear oil).
Differential Oil Rear Type:
Honda Pro-Honda HP Gear Oil (or equivalent SAE 80 hypoid gear oil).
Common Problems:
While generally reliable, common issues can include starter solenoid failures, occasional EFI sensor issues, and wear items like ball joints and tie rod ends with heavy use. Water intrusion into the CVT or engine can occur if proper submersion procedures are not followed. Rear axle seals can be a wear item.
Maintenance Tips:
Regularly clean and properly pack wheel bearings, keep electrical connectors clean and sealed, use genuine Honda fluids and filters for optimal performance and longevity.
Manufacturer:
Honda Motor Company, Ltd.
Company Focus:
Renowned for engineering excellence, reliability, and innovation across a wide range of powersports vehicles.
Lineage:
The TRX420 Rancher succeeded earlier TRX350 Rancher models, continuing Honda's strong presence in the utility ATV market.
Key Updates 2007-2013:
Introduction of the 420cc engine, adoption of PGM-FI on many models, introduction of Power Steering on select 'P' models (e.g., TRX420FPe), refinement of transmission and suspension systems.
Production Location:
Primarily manufactured in the United States.
