The 1983 Suzuki GSX400FD is a mid-size sport naked motorcycle renowned for its smooth power delivery from a four-cylinder, DOHC, air-cooled engine. Featuring a classic naked bike design with muscular lines and a balanced chassis, this model offers agile handling and strong stopping power thanks to its dual front disc brakes. Developed with a focus on modernizing engine technology and enhancing performance for the early 1980s market, the GSX400FD was positioned to compete with other popular models of its era, appealing to enthusiasts who value both performance and classic styling. This comprehensive Service Repair Manual provides detailed information essential for the maintenance and repair of your 1983 Suzuki GSX400FD. It covers all critical areas, including complete engine service, transmission service, electrical systems, and chassis components, along with detailed maintenance procedures and comprehensive troubleshooting guides. With approximately 300-500 pages of technical data and clear diagrams, this English language manual is designed to assist owners, mechanics, and technicians in understanding, maintaining, and effectively repairing the vehicle, ensuring its optimal performance and longevity. 🏷️ Basic Information Identification Make: Suzuki Model: GSX400FD Year: 1983 Product Type: Service Repair Manual 👋 Introduction Market Position Class: Mid-size sport naked motorcycle Target Audience: Enthusiasts seeking performance, reliability, and classic styling Competitive Analysis Competitors: Honda CB400F, Yamaha XJ400, Kawasaki GPZ400 Key Features Engine Type: Four-cylinder, DOHC, air-cooled, providing smooth power delivery Styling: Classic naked bike design with muscular lines Handling: Balanced chassis and suspension for agile handling Braking: Effective dual front disc brakes for strong stopping power 📋 Manual Details Coverage Areas Engine Service: Complete Transmission Service: Complete Electrical System: Complete Chassis Components: Complete Bodywork: Complete Troubleshooting: Comprehensive Maintenance Procedures: Detailed Page Count Estimated Pages: 300-500 Manual Type Type: Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: 4-stroke, DOHC, Inline-4 cylinder, air-cooled Fuel System: Carburetor system (Mikuni VM26SS x 4) Ignition System: Electronic ignition (CDI) Cooling System: Air-cooled Exhaust System: 2-into-4 exhaust configuration Transmission: 6-speed constant mesh Clutch: Wet, multi-plate Frame: Steel, double-cradle Suspension Front: Telescopic fork, oil-damped Suspension Rear: Swing arm, twin shock absorbers with adjustable preload Brakes Front: Dual hydraulic disc brakes Brakes Rear: Hydraulic disc brake Wheels Front: 3.00V-18 Wheels Rear: 4.00V-17 Tires Front: 100/90-18 M/C 56H Tires Rear: 130/90-17 M/C 64H Electrical System: 12V system, electric start, battery ignition Lighting: Halogen headlight, LED tail light, incandescent turn signals Procedures Included Engine Overhaul: Complete disassembly, inspection, and reassembly Carburetor Tuning: Adjustment, cleaning, and rebuilding Valve Adjustment: Clearance checking and adjustment procedures Transmission Repair: Gearbox disassembly, repair, and assembly Clutch Replacement: Friction plate and steel plate replacement Brake System Maintenance: Fluid replacement, caliper service, pad replacement Suspension Service: Fork seal replacement, shock absorber service Electrical Diagnostics: Wiring diagrams, troubleshooting guides for electrical faults Routine Maintenance: Oil changes, filter replacements, spark plug checks Body Panel Removal: Fairings, tank, seat removal and installation Wheel Bearing Service: Inspection and replacement Technical Depth Depth: Comprehensive (from basic maintenance to full engine rebuilds and electrical diagnostics) 📊 Manual Specifications File Format File Type: Digital PDF Searchable Text: Yes Printable: Yes Quality: High-resolution scans, clear diagrams Binding Type Binding: N/A (Digital) Paper Type Paper: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Code: GSX400FD (Specific engine variant may vary slightly) Engine Type: 4-stroke, DOHC, 4 valves per cylinder Displacement: 398 cc (24.3 cu in) Bore X Stroke: 53.0 mm x 46.8 mm (2.09 x 1.84 in) Compression Ratio: 9.7:1 Performance Horsepower Rating: Approx. 40 HP @ 9,000 rpm Torque Rating: Approx. 32 Nm (23.6 lb-ft) @ 7,000 rpm Fuel System Carburetor Type: Mikuni VM26SS (x4) constant velocity carburetors Fuel Capacity: 16 L (4.2 US gal) Fuel Type: Unleaded gasoline (91-95 RON recommended) 🔧 Transmission Standard Transmission Type: 6-speed, constant mesh Primary Drive: Gear Final Drive: Chain Features Clutch Type: Wet multi-plate Clutch Actuation: Cable 📐 Dimensions Exterior Length: Approx. 2,115 mm (83.3 in) Width: Approx. 750 mm (29.5 in) Height: Approx. 1,130 mm (44.5 in) Wheelbase: Approx. 1,430 mm (56.3 in) Ground Clearance: Approx. 145 mm (5.7 in) Weights Dry Weight: Approx. 173 kg (381.4 lbs) Wet Weight: Approx. 188 kg (414.5 lbs) 🔧 Maintenance Service Intervals Engine Oil Change: Every 3,000 km (1,860 miles) or 6 months Oil Filter Replacement: Every 6,000 km (3,730 miles) or 12 months Air Filter Cleaning: Every 3,000 km (1,860 miles) Spark Plug Replacement: Every 6,000 km (3,730 miles) Valve Clearance Check: Every 6,000 km (3,730 miles) Brake Fluid Replacement: Every 12 months Chain Lubrication: Every 1,000 km (620 miles) or after washing/rain Fluid Specifications Engine Oil Type: API SE or SF, SAE 10W-40 Engine Oil Capacity: 2.6 L (2.7 US qt) with filter change Fork Oil Type: Genuine Suzuki Fork Oil SS-03 or equivalent SAE 10W Fork Oil Capacity: 420 ml (14.2 US fl oz) per fork leg Brake Fluid Type: DOT 3 or DOT 4 Known...