🏷️ Basic Information

Make:

Suzuki

Model:

GSX400F

Model Designation:

GSX400F

Type:

Motorcycle

Vin Code Digit:

5th Digit (Engine Code, varies by specific model variant and production year, but often indicates engine configuration)

Engine Code Location:

Typically stamped on the crankcase or engine block.

👋 Introduction

Market Segment:

Mid-size sport/naked motorcycle, popular for performance, handling, and affordability in its era.

Competitors Era:

Competed with models like the Yamaha XJ400, Kawasaki GPZ400, and Honda CB400 series.

Engine Configuration:

Inline-four cylinder engine known for its smooth power delivery and sporty character.

Design Philosophy:

Balanced sportbike performance with practical everyday usability.

Owner Benefit:

Empowers owners to perform comprehensive maintenance and repairs, saving on labor costs and ensuring optimal performance and longevity.

Restoration Guide:

Indispensable for owners undertaking restoration projects, providing detailed procedures for bringing the motorcycle back to factory specifications.

📋 Manual Details

Coverage Years:

1982-1984

Page Count:

Hundreds of pages (specific count not provided in product info, but implies comprehensive nature)

Manual Type:

Service Repair Manual

Language:

English (presumed, standard for this type of manual)

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Complete disassembly, inspection, repair, and reassembly of all engine components including cylinder head, pistons, rings, crankshaft, connecting rods, valve train, lubrication system, and cooling system.

Fuel System:

Carburetor identification, adjustment, cleaning, and overhaul; fuel tank, fuel lines, and fuel pump (if applicable) inspection and maintenance.

Ignition System:

CDI unit, ignition coils, spark plugs, and wiring inspection and testing.

Transmission Drivetrain:

Gearbox overhaul, clutch inspection and adjustment, final drive (chain and sprockets) maintenance and replacement.

Brake System:

Front and rear brake mechanisms (disc/drum), hydraulic system components (master cylinder, calipers, lines), fluid replacement, bleeding procedures, and pad/shoe replacement.

Suspension Steering:

Front fork overhaul and adjustment, rear shock absorber inspection and replacement, steering head bearing service, and wheel bearing maintenance.

Electrical System:

Wiring diagrams, battery maintenance, charging system (alternator/stator), lighting system, horn, starter motor, and instrument cluster.

Frame Bodywork:

Frame inspection, body panel removal and installation, seat, handlebars, and fairings.

Routine Maintenance:

Oil changes, filter replacement, chain lubrication and adjustment, tire pressure checks, brake adjustments, and general inspections.

Troubleshooting:

Diagnostic charts and procedures for identifying and resolving common performance issues and malfunctions across all major systems.

Component Rebuild:

Detailed step-by-step instructions for the overhaul and refurbishment of critical components such as the engine, transmission, carburetors, and brake master cylinders.

Electrical Diagnosis:

Procedures for testing electrical components, tracing wiring faults, and diagnosing charging system and ignition issues using multimeter readings and wiring diagrams.

Depth Level:

Comprehensive (covers everything from routine maintenance to full engine rebuilds and complex electrical diagnostics)

Diagnostic Focus:

Detailed diagnostic procedures, including common symptoms and probable causes for various malfunctions.

Torque Specifications:

Provides essential torque values for all critical fasteners and component assemblies.

Special Tools:

Identifies specific tools or equipment required for certain repair procedures.

📊 Manual Specifications

File Format:

PDF

Searchability:

Typically searchable text within PDF for efficient information retrieval.

Print Quality:

High resolution, suitable for clear printing of diagrams and text.

Binding Type:

N/A (Digital PDF format)

Paper Type:

N/A (Digital PDF format)

⚙️ Engine Specifications

Engine Type:

4-stroke, DOHC, inline-four cylinder

Displacement:

398cc (approximate, often cited as 398 or 400cc)

Bore X Stroke:

53.4 mm x 44.7 mm (typical for this era's 400cc inline-fours, manual will confirm)

Compression Ratio:

9.7:1 (typical, manual will provide exact spec)

Horsepower:

Approximately 50-55 HP at 11,000 RPM (typical for the model and era, manual will detail specific output)

Torque:

Approximately 35 Nm (26 lb-ft) at 9,000 RPM (typical, manual will detail specific output)

Carburetion:

Mikuni BS32 (likely) downdraft carburetors (manual will specify exact model and number of carbs)

Fuel Type:

Unleaded gasoline (91-98 RON)

Oil Type:

API SE, SF or SG, SAE 10W-40 (recommendation based on era, manual will specify exact Suzuki recommendation)

Oil Capacity:

Approx. 2.4 liters (with filter change) (manual will confirm precise capacity)

Cooling Method:

Air-cooled

🔧 Transmission

Transmission Type:

Constant mesh, 6-speed sequential

Optional Transmission:

N/A (all models typically came with the 6-speed manual)

Clutch Type:

Wet, multi-plate

Final Drive:

Chain drive

Gear Ratios:

Specific gear ratios are detailed in the manual, crucial for performance tuning.

Transmission Oil Type:

API GL-4 SAE 80W-90 (typical for motorcycle gearboxes, manual will confirm)

Transmission Oil Capacity:

Approx. 0.7 liters (manual will confirm)

📐 Dimensions

Overall Length:

Approx. 2070 mm (manual will provide exact figure)

Overall Width:

Approx. 755 mm (manual will provide exact figure)

Overall Height:

Approx. 1155 mm (manual will provide exact figure)

Wheelbase:

Approx. 1410 mm (manual will provide exact figure)

Ground Clearance:

Approx. 140 mm (manual will provide exact figure)

Dry Weight:

Approx. 177 kg (manual will provide exact figure)

Wet Weight:

Approx. 194 kg (with fluids, manual will provide exact figure)

Load Capacity:

Recommended load capacity for rider and passenger specified in manual.

🛡️ Safety Features

Safety Ratings:

Motorcycle safety standards of the era (e.g., headlight performance, braking efficiency) are implicitly addressed by the manual's repair and maintenance procedures.

Braking System:

Dual front disc brakes and a rear disc brake (standard for this model), with detailed maintenance and repair procedures in the manual.

Tires:

Standard tire sizes and pressure recommendations are crucial for handling and safety, detailed in the manual.

Frame Construction:

Steel diamond frame providing structural integrity.

Lighting:

Headlight, taillight, brake lights, and turn signals; electrical system checks in the manual ensure proper function.

💡 Technology Features

Infotainment Features:

N/A (This era of motorcycle did not feature infotainment systems).

Driver Assistance Features:

N/A (No electronic rider aids typical of modern motorcycles).

Connectivity Features:

N/A (No Bluetooth, Wi-Fi, or smartphone integration).

Instrument Cluster:

Analog speedometer, tachometer, fuel gauge, odometer, trip meter, and indicator lights. Manual details servicing and potential troubleshooting.

🔧 Maintenance

Oil Change Interval:

Every 3,000 km or 6 months (typical for the era, manual will confirm exact recommendation)

Spark Plug Replacement:

Every 10,000 km (typical, manual will specify exact interval and plug type)

Valve Clearance Check:

Every 10,000 km or annually (typical, manual will specify exact interval and procedure)

Chain Maintenance:

Lubricate every 500 km and adjust slack as needed (detailed procedure in manual)

Brake Fluid:

DOT 3 or DOT 4 (manual will specify exact requirement)

Coolant Type:

N/A (Air-cooled engine)

Carburetor Gumming:

Common issue with older motorcycles; manual provides cleaning and synchronization procedures.

Electrical Gremlins:

Age-related wiring degradation or connector issues; comprehensive wiring diagrams and diagnostic tips are in the manual.

Clutch Slippage:

Wear on clutch plates; manual details inspection, adjustment, and replacement.

Suspension Wear:

Fork seals and rear shock absorbers may require service; manual provides overhaul instructions.

📚 Vehicle History

Brand History:

Suzuki has a long and distinguished history in motorcycle manufacturing, known for innovation and performance across various categories since its founding.

Gsx Series Lineage:

The GSX line represents Suzuki's popular sportbike offerings, with the 400cc models serving as accessible performance machines in key markets.

Gsx400F Positioning:

The GSX400F was a significant model in Suzuki's 400cc class lineup, known for its compact and potent inline-four engine.

Production Period:

The 82-84 period covers a key phase of this model's production, before potential updates or replacements.

Manufacturing Location:

Primarily manufactured in Japan.

🏆 Awards & Recognition

Era Awards:

While specific awards for the GSX400F might be obscure or regional, the GSX series generally received positive reviews for performance and handling in motorcycle publications of its time.

Reliability Perception:

Suzuki motorcycles of this era were generally considered reliable and well-built, with proper maintenance as detailed in the manual.

Manual Certification:

N/A (This is a third-party reproduction of a factory service manual or compiled information.)