The Suzuki GS1000S, produced between 1979 and 1980, stands as a high-performance sportbike from its era, celebrated for its potent DOHC inline-four engine and sporty handling. This model competed directly with other large-displacement sportbikes of the late 1970s and early 1980s, offering a compelling blend of raw power, estimated at approximately 90 HP, and advanced features for its time, including shaft drive, a distinctive fairing design, and capable suspension. Its engineering quality and market impact solidified Suzuki's reputation in the performance motorcycle segment, representing a significant advancement in Japanese motorcycle technology. This comprehensive Service Repair Manual is designed to guide owners and technicians through the maintenance and repair of the Suzuki GS1000S. It covers essential systems such as the engine, drivetrain, chassis, electrical system, and fuel system, providing detailed procedures for routine maintenance, troubleshooting, and complete overhauls. The manual includes step-by-step instructions for engine rebuilds, carburetor tuning, electrical system diagnosis, and suspension service, alongside high-resolution diagrams and crucial technical specifications. Its searchable format ensures efficient access to information, empowering users to effectively maintain and preserve the performance and reliability of their vintage Suzuki sportbike. 🏷️ Basic Information Identification Make: Suzuki Model: GS1000S Year: 1979-1980 👋 Introduction Market Market Position: High-performance sportbike of its era, known for its powerful engine and sporty handling. Competitive Analysis Competitive Analysis: Competed directly with other large-displacement sportbikes of the late 70s and early 80s, offering a blend of power and sport-oriented features. Key Features Key Features: DOHC inline-four engine, shaft drive, advanced suspension, distinctive fairing design. Historical Context Historical Context: Represents a peak in Japanese motorcycle engineering of the late 1970s, pushing performance boundaries for street motorcycles. 📋 Manual Details Coverage Manual Type: Service Repair Manual Format Format: PDF Download Language Language: English 📖 Manual Coverage Systems Systems Covered: Engine, Drivetrain, Chassis, Electrical System, Fuel System, Ignition System, Cooling System, Braking System, Suspension System, Wheels and Tires, Bodywork, Lubrication System, Troubleshooting, Specifications Electrical System Details: Detailed wiring diagrams, component testing procedures, troubleshooting for lighting, ignition, charging system, and starting system. Fuel Ignition System Details: Detailed carburetor overhaul, jetting information, ignition timing adjustments, CDI unit testing. Procedures Procedures Included: Routine Maintenance, Troubleshooting, Engine Overhaul, Carburetor Tuning, Electrical System Diagnosis, Brake Service, Suspension Adjustments, Clutch Service, Transmission Overhaul, Wiring Diagrams Engine Rebuild Procedures: Step-by-step instructions for engine disassembly, inspection, component replacement (pistons, rings, bearings, valves), and reassembly with torque specifications. Suspension Service: Front fork oil change and seal replacement, rear shock absorber inspection and replacement procedures. Depth Technical Depth: Comprehensive (from basic maintenance to complete engine and electrical system rebuilds) Technical Depth Diagnostic Procedures: Includes specific diagnostic trees and troubleshooting guides for common performance issues, electrical faults, and mechanical problems. 📊 Manual Specifications File File Format: Searchable PDF Searchability: Fully searchable PDF text for quick information retrieval. Quality Print Quality: High-resolution, printable pages Diagram Quality: Clear, high-resolution diagrams and illustrations. Binding Binding Type: Digital Download (PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke, DOHC, inline 4-cylinder Displacement: 997 cc (60.8 cu in) Bore X Stroke: 74 mm x 58 mm (2.9 in x 2.3 in) Compression Ratio: 9.2:1 Valve Train: DOHC, 2 valves per cylinder Power Per Liter: Approx. 90.3 hp/liter Performance Horsepower: Approx. 90 HP (67 kW) @ 8,000 RPM (claimed) Torque: Approx. 77 Nm (57 lb-ft) @ 7,000 RPM (claimed) Top Speed: Approx. 200 km/h (125 mph) (depending on rider and conditions) Fuel System Carburetors: 4 x Mikuni VM29SS (sliding throttle valve type) Fuel Tank Capacity: 22 Liters (5.8 US gal) Fuel Type: Unleaded gasoline, 91-95 octane Ignition Ignition System: CDI (Capacitor Discharge Ignition) Lubrication Lubrication Type: Wet sump Cooling Cooling System: Air-cooled 🔧 Transmission Drivetrain Transmission Type: 5-speed constant mesh Final Drive: Shaft drive Features Clutch Type: Wet, multi-plate 📐 Dimensions Exterior Length: Approx. 2,200 mm (86.6 in) Width: Approx. 800 mm (31.5 in) Height: Approx. 1,200 mm (47.2 in) Wheelbase: Approx. 1,460 mm (57.5 in) Weights Dry Weight: Approx. 230 kg (507 lbs) Wet Weight: Approx. 250 kg (551 lbs) 🛡️ Safety Features Brakes Front Front Brakes: Dual 275 mm discs with hydraulic calipers Brakes Rear Rear Brakes: 260 mm disc with hydraulic caliper Wheels Tires Front Tire Size: 3.75-19 Rear Tire Size: 4.00-18 Wheel Type: Cast alloy (typically spoke design) 💡 Technology Features Infotainment Infotainment Features: Basic analog instrumentation (speedometer, tachometer, fuel gauge, indicator lights). No modern infotainment or connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 km or 6 months Valve Clearance Check: Every 6,000 km Fluid Specifications Engine Oil Type: API SE, SAE 10W-40 (or as per manual recommendation) Engine Oil Capacity: Approx. 3.4 Liters (with filter change) Brake Fluid Type: DOT 3 or DOT 4 Final Drive Oil Type: SAE 80 API GL-4 Gear Oil Coolant Type: N/A (Air-cooled) Known Issues Known Issues: Cam chain tensioner wear, potential for carburetor synchronization drift, aging electrical connectors,...