Vehicle Segment:
Sportbike / UJM (Universal Japanese Motorcycle) - positioned as a versatile and capable machine for its era.
Key Competitors:
Honda CB750, Kawasaki KZ750/KZ900/KZ1000, Yamaha XS750/XS1100.
Engine Configuration:
Inline-four cylinder, DOHC engine offering a balance of performance and smoothness.
Chassis Design:
Robust steel frame providing stable handling characteristics.
Braking System:
Early models featured single front disc brakes, with later models often upgrading to dual front discs for improved stopping power.
Engine Overhaul:
Complete engine disassembly, inspection, repair, and reassembly for all engine variants.
Fuel System:
Carburetor identification, adjustment, overhaul, and troubleshooting (Mikuni VM series common).
Ignition System:
Ignition timing, coil testing, spark plug specifications, CDI unit diagnostics.
Transmission And Drivetrain:
Gearbox disassembly, clutch service, final drive inspection and adjustment.
Suspension:
Front fork service (oil change, seal replacement), rear shock absorber inspection and replacement.
Brakes:
Front and rear brake system inspection, hydraulic fluid flush, pad/shoe replacement, caliper service.
Electrical System:
Wiring diagrams, battery service, charging system (alternator/stator), starter motor, lighting, and instrumentation troubleshooting.
Chassis And Frame:
Frame inspection, steering head bearing service, wheel bearing replacement.
Bodywork And Trim:
Panel removal and installation, fairing components (if applicable to specific trims), seat and tank maintenance.
Scheduled Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug replacement, valve clearance checks.
Troubleshooting Guides:
Diagnostic flowcharts and symptom-based problem-solving for common issues.
Rebuilding Procedures:
Detailed step-by-step instructions for rebuilding major components like engines and carburetors.
Adjustment Procedures:
Carburetor synchronization, ignition timing, clutch and brake lever adjustments.
Torque Specifications:
Precise torque values for all critical fasteners to ensure proper assembly and prevent damage.
Diagnostic Capabilities:
Advanced diagnostics covering electrical circuits, fuel delivery, and mechanical components.
Rebuild Completeness:
Full engine, transmission, and carburetor rebuild procedures.
Special Tool Requirements:
Identification of necessary special tools for specific repair and maintenance tasks.
Engine Type:
Air-cooled, four-stroke, DOHC, inline-four cylinder
Displacement:
748 cc (for most GS750 models)
Bore X Stroke:
Approx. 65.0 mm x 56.0 mm (verify with specific model variant)
Horsepower:
Approximately 70-75 hp @ 8,000-9,000 rpm (varies by year and tuning)
Torque:
Approximately 45-50 lb-ft @ 6,500-7,000 rpm (varies by year and tuning)
Carburetion:
Typically dual Mikuni VM34SS or VM36SS constant-velocity carburetors
Fuel Type:
Unleaded gasoline (recommend 91 octane or higher)
Ignition:
Transistorized Ignition (TCI) or CDI (Capacitor Discharge Ignition) system
Oil Type:
SAE 20W-40 or SAE 10W-40 motorcycle specific API SE, SF, or SG rated oil
Oil Capacity With Filter:
Approx. 3.2 - 3.5 liters (3.4 - 3.7 US quarts)
Transmission Type:
5-speed constant mesh, sequential manual transmission
Shaft Drive Option:
Some GS750 variants may have had shaft drive options, but most common models are chain-driven.
Clutch Type:
Wet multi-plate clutch
Transmission Oil Type:
SAE 80W-90 API GL-4 gear oil for the final drive (if applicable), transmission uses engine oil.
Overall Length:
Varies slightly by year/model, approximately 2150-2250 mm
Overall Width:
Varies slightly by year/model, approximately 750-850 mm
Overall Height:
Varies slightly by year/model, approximately 1150-1250 mm
Dry Weight:
Approximately 220-240 kg (485-530 lbs)
Wet Weight:
Approximately 235-255 kg (518-562 lbs)
Fuel Capacity:
Approximately 18-20 liters (4.7-5.3 US gallons)
Crash Test Information:
Motorcycle safety is primarily determined by rider skill and adherence to safe riding practices. No formal crash test ratings like automobiles.
Braking System Performance:
Early models with single front disc, later models often with dual front discs and a rear drum brake. ABS was not a feature in this era.
Lighting System:
Halogen headlight, tail light, brake light, and turn signals for visibility.
Instrumentation:
Analog speedometer, tachometer, fuel gauge (on some models), and indicator lights for turn signals, oil pressure, and high beam.
ABS:
Not available on any GS750 models.
Bluetooth Or Usb:
Not applicable to this era of motorcycle technology.
Oil Change Interval:
Every 3,000-5,000 km (1,800-3,000 miles) or 6 months, whichever comes first.
Air Filter Cleaning Or Replacement:
Check every 3,000-5,000 km, clean or replace as needed. Often foam or paper element.
Spark Plug Replacement:
Every 6,000-10,000 km (3,700-6,200 miles) or as per manual specifications.
Valve Clearance Check:
Every 6,000-10,000 km (3,700-6,200 miles) or annually. Requires shims or screw/locknut adjustment.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (check manual for specific recommendation)
Fork Oil Type:
SAE 10W or SAE 15W fork oil (refer to manual for exact viscosity and quantity)
Carburetor Issues:
Gumming and clogging of carburetors due to infrequent use and fuel degradation. Synchronization can drift.
Electrical Gremlins:
Corrosion in connectors, failing voltage regulators, and worn stator windings are common on aging Japanese bikes.
Engine Oil Leaks:
Worn cam cover gaskets, output shaft seals, and crank seals can develop leaks over time.
Suspension Wear:
Fork seals can fail, leading to oil leaks. Rear shock absorbers can lose damping effectiveness.
Suzuki Motorcycle History:
Suzuki has a long history of producing innovative and reliable motorcycles, particularly known for its inline-four engines and performance-oriented models.
Gs Series Development:
The GS750 was part of Suzuki's successful GS series, which debuted in the mid-1970s, offering a competitive alternative to established models from Honda and Kawasaki.
Gs750 Variants:
Subsequent models included the GS750E, GS750L (cruiser style), GS750GL (shaft drive), and the GS750TD (with alloy wheels and different styling).
Manufacturing Period:
Produced throughout the late 1970s and early 1980s, with significant updates and variations within this timeframe.
