ATC250sx Service Manual Repair 1985-1987 ATC 250sx

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Typ: Atv

Anbieter:

Art.-Nr: 145400

Stichworte: 1985 1986 1987 ATC Series ATC250sx Atv Honda Motorcycles

Produktvarianten

Beschreibung

This manual covers the ATC250sx All-Terrain Cycle (ATV) produced for the model years 1985, 1986, and 1987. The ATC250sx is a sport-oriented, liquid-cooled, four-stroke ATV known for its reliable engineering and powerful performance within its class. It features a 248 cc engine, a 5-speed manual transmission with an automatic clutch, and hydraulic disc brakes front and rear, making it a capable machine for recreational riding. This model was a significant contributor to the legacy in the sport ATV market, competing with other notable machines of its era. The purpose of this comprehensive service manual is to provide detailed information for the maintenance, troubleshooting, and repair of your ATC250sx. It covers a wide range of topics, including complete engine tear-down and rebuild procedures, fuel system and carburetor overhaul, ignition system diagnostics, transmission and drivetrain service, suspension and brake system maintenance, and electrical system troubleshooting. With over 261 pages of detailed instructions, including pictures and part diagrams, this English-language resource is an essential tool for owners and technicians to ensure the optimal performance and longevity of their ATC250sx.

🏷️ Basic Information

Identification

Make:

Honda

Model:

ATC250sx

Vehicle Type:

All-Terrain Cycle (ATV)

Codes

Product Name:

ATC250sx Service Manual Repair 1985-1987 ATC 250sx

Model Years Covered:

1985, 1986, 1987

Common Abbreviations:

ATC (All-Terrain Cycle), sx (Sport)

👋 Introduction

Market Position

Category:

Sport and Recreation ATV

Competitive Analysis

Competitors Era:

Yamaha Tri-Z, Suzuki LT250R, Kawasaki Tecate 3

Key Features

Distinguishing Features:

Sport-oriented design, liquid-cooled engine, reliable Honda engineering, powerful for its class.

Manual Value Proposition:

Essential resource for owners and mechanics to maintain, repair, and optimize the performance of their 1985-1987 Honda ATC250sx.

📋 Manual Details

Coverage Areas

General Coverage:

Complete tear down and rebuild, maintenance, troubleshooting, repair

Specific Systems:

Engine, transmission, chassis, electrical system, bodywork, suspension, brakes, fuel system, cooling system

Page Count

Total Pages:

Manual Type

Type:

Service Manual / Repair Manual

Language

Language:

English

Format

Digital Format:

Interactivity:

Clickable chapters, searchable text

Usage Rights:

No restrictions on printing or saving/burning to disc

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Complete engine disassembly, inspection, assembly, valve clearance adjustment, piston and cylinder service, crankshaft and connecting rod inspection, timing components

Fuel System:

Carburetor (Mikuni VM series) overhaul, main jet, pilot jet, mixture screw adjustment, fuel pump operation, fuel line maintenance

Ignition System:

Magneto ignition system, CDI unit, ignition coil testing, spark plug specifications, timing checks

Cooling System:

Radiator, cooling fan, thermostat operation, coolant type and capacity, flushing procedures

Transmission Drivetrain:

5-speed transmission, clutch operation and adjustment, primary reduction gear, drive shaft, rear axle, final drive maintenance

Suspension:

Front telescopic forks (including fork oil type and capacity, seal replacement), rear swingarm, shock absorber (single rear shock with adjustable preload), linkage maintenance

Brakes:

Front and rear hydraulic disc brakes, brake pad replacement, brake fluid type and bleeding procedures, rotor inspection

Electrical System:

Lighting system (headlight, taillight, brake light), battery maintenance, charging system (stator, rectifier/regulator), starter system (kickstart mechanism, decompression lever)

Chassis Bodywork:

Frame inspection, handlebar and controls, seat removal, fender and plastic component service, airbox and filter maintenance

Procedures Included

Routine Maintenance:

Oil change, air filter cleaning/replacement, spark plug inspection/replacement, chain adjustment, brake adjustment, general lubrication schedule

Troubleshooting:

Diagnostic procedures for common issues like no-spark conditions, starting problems, engine misfires, electrical faults, braking issues

Rebuilding:

Complete engine rebuild, carburetor overhaul, transmission rebuild, suspension component overhaul

Adjustments:

Valve clearance, carburetor idle speed and mixture, clutch, brakes, throttle cable

Inspection:

Component wear checks, chassis integrity, fluid levels and condition

Installation:

Component replacement procedures, e.g., brakes, tires, electrical parts

Technical Depth

Depth:

Comprehensive; covers everything from basic maintenance to full engine and transmission rebuilds, including detailed diagnostics and specifications.

Visuals:

Includes pictures and part diagrams to aid in identification and repair.

📊 Manual Specifications

File Format

File Type:

Print Quality

Printability:

Printable

Binding Type

Binding Style Digital:

N/A (Digital - PDF)

Paper Type

Paper Quality Digital:

N/A (Digital - PDF)

Searchability

Text Search:

Searchable

Navigation

Chapter Navigation:

Clickable chapters

⚙️ Engine Specifications

Primary Engine

Engine Type:

Liquid-cooled, four-stroke, single-cylinder, OHC

Displacement:

248 cc (approximately)

Bore X Stroke:

68.0 mm x 68.5 mm

Compression Ratio:

9.0:1

Cooling Method:

Liquid-cooled

Performance

Horsepower Approximate:

20-25 HP (estimated, depending on specific model year and tuning)

Torque Approximate:

N/A (specific torque figures not readily available for this model)

Fuel System

Carburetor Model:

Mikuni VM34SS (typical for this model)

Fuel Capacity:

3.0 US gallons (approx.)

Fuel Type:

Unleaded gasoline (87 octane or higher recommended)

🔧 Transmission

Standard

Transmission Type:

5-speed manual with automatic clutch (semi-automatic)

Clutch Type:

Automatic centrifugal clutch

Features

Drive System:

Shaft drive to rear axle

📐 Dimensions

Exterior

Overall Length:

76.2 inches

Overall Width:

46.1 inches

Overall Height:

42.7 inches

Wheelbase:

49.6 inches

Weights

Dry Weight:

403 lbs

Ground Clearance:

5.5 inches

🛡️ Safety Features

Ratings

Atv Safety Considerations:

ATVs, especially 3-wheelers, carry inherent risks. Operation requires caution, proper protective gear, and adherence to terrain limitations. This manual does not replace safety training.

Active Features

Braking System:

Hydraulic disc brakes front and rear.

Passive Features

Handlebar Design:

Standard handlebar with grips and controls for throttle, brake, and clutch.

💡 Technology Features

Infotainment

Features:

N/A (focus on mechanical and electrical operation, not infotainment).

Driver Assistance

Features:

🔧 Maintenance

Service Intervals

Engine Oil Change:

Every 1,000 miles or annually, or more frequently under severe use. Check manual for specific recommendation.

Air Filter Cleaning:

Every 300 miles or as needed in dusty conditions.

Spark Plug Inspection:

Every 600 miles or annually.

Brake Fluid Flush:

Every 2 years or as recommended.

Fluid Specifications

Engine Oil Type:

SAE 10W-30 API SE or SF (refer to manual for exact specification).

Engine Oil Capacity:

Approximately 1.7 US quarts (1.6 liters) with filter change (verify in manual).

Fork Oil Type:

Honda Suspension Fluid SS-7 or equivalent (verify in manual).

Fork Oil Capacity:

Approximately 250 ml per fork leg (verify in manual).

Brake Fluid Type:

DOT 3 or DOT 4 hydraulic brake fluid (verify in manual).

Coolant Type:

Mixture of Honda Antifreeze/Coolant (4-stroke) and distilled water (50:50 ratio).

Known Issues

Common Wear Items:

Brake pads, clutch plates, tires, fork seals, carburetor jets due to age and usage.

Carburetor Tuning:

Carburetors can become finicky with age; proper cleaning and tuning are essential for optimal performance.

Electrical Connections:

Corrosion on electrical connectors can lead to intermittent faults or complete system failure.

📚 Vehicle History

Brand Heritage

Honda Atv Legacy:

Honda pioneered the ATV market with the ATC90 in the 1970s and continued to innovate with sportier and more powerful models like the ATC250sx.

Model Evolution

Atc Series Development:

The ATC250sx represented a step up in performance and features from earlier ATC models, targeting riders seeking a more capable sport trike.

Production

Production Period:

1985-1987

Atv Market Shift:

This era saw the beginning of a shift towards 4-wheel ATVs due to safety concerns and regulatory changes surrounding 3-wheelers.

🏆 Awards & Recognition

Recognitions

Industry Impact:

The ATC250sx was a significant model in the sport ATV segment during its production run, contributing to Honda's reputation for performance and reliability.