1986 Honda Fourtrax 250 Manual Download

The 1986 Honda Fourtrax 250 is a reliable all-terrain vehicle featuring a 246cc four-stroke engine, shaft drive system, full floorboards, and dual-range transmission. This comprehensive manual covers maintenance procedures, troubleshooting guides, technical specifications, and operational instructions for optimal performance and longevity of your ATV.

1. Vehicle Specifications 2. Maintenance Schedule 3. Engine Service 4. Transmission & Drive System 5. Electrical System 6. Brake System 7. Suspension & Steering 8. Troubleshooting Guide 9. Parts Catalog 10. Warranty Information 11. Safety Precautions

Vehicle Specifications

Complete technical specifications for the 1986 Honda Fourtrax 250 ATV.

Specification	Details
Engine Type	246cc air-cooled four-stroke single cylinder
Bore x Stroke	74.0mm x 57.8mm
Compression Ratio	9.2:1
Carburetor	24mm piston valve
Ignition System	CDI electronic ignition
Transmission	5-speed with reverse
Drive System	Shaft drive
Front Suspension	Double wishbone
Rear Suspension	Swingarm with dual shocks
Brakes	Drum brakes front and rear

Maintenance Schedule

Recommended maintenance intervals for optimal performance.

Oil Change: Every 100 hours or 6 months
Air Filter Cleaning: Every 50 hours
Spark Plug Replacement: Every 200 hours
Brake Adjustment: Every 100 hours
Drive Shaft Lubrication: Every 200 hours

WARNING! Always perform maintenance with engine off and cool. Use proper safety equipment.

Engine Service

Detailed engine maintenance and repair procedures.

Valve Clearance Adjustment: 0.08mm intake, 0.10mm exhaust
Oil Capacity: 1.9 liters with filter change
Compression Test: Should read 156-185 psi
Carburetor Adjustment: 2-1/2 turns out from lightly seated
Cooling System: Air-cooled with external fins

CAUTION! Engine components may be hot. Allow sufficient cooling time before servicing.

Transmission & Drive System

Transmission Type: 5-speed constant mesh with reverse
Oil Capacity: 0.8 liters
Drive System: Shaft drive with universal joints
Gear Ratios: 1st: 2.769, 2nd: 1.722, 3rd: 1.263, 4th: 1.000, 5th: 0.838, Reverse: 3.000
Final Drive: Shaft to rear differential

Electrical System

Complete electrical system specifications and troubleshooting.

Battery: 12V 8Ah
Charging System: AC generator
Headlight: 25W/25W
Spark Plug: NGK DR8ES-L
Fuses: Main 15A, Headlight 10A

Brake System

Front and rear drum brake maintenance and adjustment procedures.

Brake Adjustment: Turn adjuster clockwise to tighten
Brake Shoes: Replace when lining thickness below 1.5mm
Brake Cables: Lubricate every 100 hours
Brake Fluid: DOT 3 or DOT 4

Tip: Always test brakes in safe area after adjustment.

Suspension & Steering

Front double wishbone and rear swingarm suspension systems.

Front Suspension: Double wishbone with 120mm travel
Rear Suspension: Swingarm with dual shocks, 110mm travel
Steering: Direct linkage with handlebars
Wheel Alignment: Toe-in 0-10mm
Shock Adjustment: Preload adjustable on rear shocks

WARNING! Check all suspension bolts for proper torque before riding.

Troubleshooting Guide

Common problems and solutions for the Fourtrax 250.

Symptom	Possible Cause	Corrective Action
Hard starting	Dirty carburetor, weak spark	Clean carburetor, check spark plug and ignition
Poor performance	Clogged air filter, fuel issues	Clean air filter, check fuel flow
Transmission noise	Low oil level, worn gears	Check oil level, inspect transmission
Electrical failure	Blown fuse, bad battery	Check fuses, test battery voltage
Brake issues	Worn shoes, cable adjustment	Inspect brake shoes, adjust cables

Parts Catalog

Genuine Honda parts and replacement components.

Engine parts, transmission components, electrical parts, suspension parts, brake components, body panels, and accessories available through authorized Honda dealers.

Warranty Information

Original 1986 warranty coverage and current parts availability.

Original limited warranty: 6 months. Current parts support through Honda dealerships and authorized parts distributors.

Safety Precautions

Essential safety information for operating and maintaining your ATV.

Always wear helmet and protective gear
Never operate on public roads
Avoid steep inclines and rough terrain beyond capability
Regularly inspect tires, brakes, and controls
Keep hands and feet away from moving parts during operation

Service: Contact authorized Honda service centers for professional repairs.