Historical Context:
The GS750 was a pivotal model for Suzuki, bridging the gap between smaller displacement bikes and larger four-cylinder machines, establishing Suzuki as a major player in the large-displacement motorcycle market.
Competitors:
Competed directly with Yamaha XS750, Kawasaki KZ750, and Honda CB750 models of the era.
Engine Type:
Air-cooled, DOHC, inline-four cylinder engine.
Drivetrain:
Shaft drive, a premium feature for its time.
Suspension:
Telescopic front forks (often with air assist) and dual rear shock absorbers.
Engine:
Complete engine overhaul, tuning, diagnosis, lubrication system, cooling system, valve train
Fuel System:
Carburetor disassembly, cleaning, adjustment, jetting, fuel pump, fuel lines
Transmission:
Gearbox disassembly, assembly, clutch operation, shift mechanism
Drivetrain:
Shaft drive system, U-joints, final drive assembly
Suspension:
Front fork (air assist on some models) rebuild and adjustment, rear shock absorber maintenance and replacement
Brakes:
Front and rear brake system maintenance, caliper overhaul, hydraulic fluid replacement, disc inspection
Electrical:
Wiring diagrams, ignition system (CDI), lighting, charging system (alternator, battery), starter motor, instrumentation
Chassis And Frame:
Frame inspection, steering head bearing adjustment, wheel bearing maintenance
Bodywork And Trim:
Fender, seat, tank, side covers, and accessory fitment
Maintenance:
Oil changes, filter replacement, spark plug replacement, chain adjustment (if applicable), brake bleeding, lubrication points
Troubleshooting:
Diagnostic procedures for common starting, running, and electrical issues, symptom-based fault finding
Repair:
Step-by-step disassembly and reassembly instructions for all major components
Special Tools:
Identification and usage of specialized tools required for specific procedures
Depth:
Comprehensive from basic user maintenance to full engine rebuilds and electrical system diagnostics.
Engine Type:
Inline 4-cylinder, 4-stroke, DOHC
Displacement:
748 cc (74.8 x 43.6 mm bore x stroke)
Valve Train:
DOHC, 2 valves per cylinder, chain-driven camshaft
Cooling System:
Air-cooled
Lubrication System:
Forced lubrication with wet sump
Horsepower:
Approx. 72 hp @ 8500 rpm (varies slightly by year/model)
Torque:
Approx. 60 Nm @ 6500 rpm (varies slightly by year/model)
Carburetors:
Mikuni VM30 or VM32 constant velocity carburetors (4)
Fuel Type:
Unleaded gasoline (minimum 91 RON/87 AKI recommended)
Ignition Type:
Transistorized Ignition (CDI)
Safety Rating Context:
N/A (Motorcycle, no formal automotive safety ratings like cars)
Braking System:
Disc brakes front and rear (single disc front on early models, dual on later/some variants), hydraulic actuation.
Lighting:
Halogen headlamp, integrated tail/brake light, turn signals.
Engine Oil Change:
Every 3,000 km or 6 months, whichever comes first.
Oil Filter Replacement:
With every oil change.
Spark Plug Replacement:
Every 6,000 km or 12 months.
Valve Clearance Check:
Every 12,000 km or 12 months.
Shaft Drive Oil Change:
Every 6,000 km or 12 months.
Engine Oil Type:
SAE 10W-40 API SE or SF, Motorcycle Specific (e.g., Suzuki recommends Suzuki V-Twin oil or equivalent)
Engine Oil Capacity:
3.4 Liters (3.6 US qt) with filter change
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid
Front Fork Oil Type:
SAE 10W (or Suzuki Fork Oil SS-10)
Front Fork Oil Capacity:
172 ml (5.8 US fl oz) per fork leg
Final Drive Oil Type:
API GL-5 Gear Oil (SAE 80W-90 recommended)
Final Drive Oil Capacity:
130 ml (4.4 US fl oz)
Cam Chain Tensioner:
Can wear over time, leading to a rattling noise from the engine. Manual details inspection and replacement.
Carburetor Synchronization:
Requires regular synchronization for optimal performance and fuel economy. Manual provides detailed procedure.
Shaft Drive Splines:
Periodic greasing of the output shaft splines is recommended to prevent seizure. Manual specifies greasing interval and type.
Electrical Connections:
Corrosion in electrical connectors can lead to intermittent faults. Manual aids in tracing and cleaning.
Clutch Slippage:
Wear of clutch plates can cause slippage. Manual covers clutch inspection, adjustment, and replacement.
Suzuki Motorcycle History:
Suzuki's history in motorcycles dates back to the early 20th century, with significant growth in the post-WWII era, focusing on innovation and performance across various engine sizes and styles.
Gs750 Introduction:
Introduced in 1977, the GS750 was Suzuki's response to the growing demand for larger-displacement Japanese motorcycles, offering a smooth inline-four with shaft drive, a combination of features that appealed to a broad audience.
Model Variants:
Variations included the standard GS750E (often with spoke wheels), the GS750L (custom styling, often with a stepped seat and drag bars), and the GS750T (a later evolution, sometimes with cast wheels and revised styling).
Production Years:
1977-1983
