Segment:
Sportbike/Naked Bike
Target Audience:
Enthusiasts and owners seeking to perform maintenance, repairs, and tuning on their classic Suzuki sportbike.
Competitors 1982:
Yamaha XJ Series, Kawasaki GPz Series, Honda CB Series of similar displacement.
Engine Layout:
DOHC inline-four, air-cooled, providing a balance of performance and reliability for its era.
Design Philosophy:
Suzuki's focus on performance-oriented, multi-cylinder motorcycles that bridged the gap between commuter and track-focused machines.
Engine:
Detailed diagrams, specifications, disassembly, assembly, troubleshooting, and tuning of the 398cc 4-stroke, DOHC, air-cooled engine.
Fuel System:
Carburetor identification, adjustment, overhaul, and troubleshooting (likely Mikuni VM series or similar).
Ignition System:
CDI ignition timing, component testing, troubleshooting, and specifications.
Transmission:
Gearbox disassembly, inspection, repair, clutch operation, and specifications.
Drivetrain:
Chain and sprocket maintenance, adjustment, and replacement procedures.
Brakes:
Front and rear brake system maintenance, hydraulic system bleeding, pad/shoe replacement, and caliper/master cylinder service.
Suspension:
Front fork disassembly, seal replacement, oil specifications, damping adjustment, and rear shock absorber service.
Electrical System:
Wiring diagrams, component testing (lights, starter, charging system), battery maintenance, and troubleshooting.
Cooling System:
Air-cooling system efficiency, cleaning, and related components.
Frame And Bodywork:
Frame inspection, fairing removal/installation, and general chassis components.
Maintenance:
Regular service intervals, oil changes, filter replacements, lubrication points, chain adjustment, and brake fluid checks.
Troubleshooting:
Diagnostic flowcharts and common problem-solving guides for engine, electrical, and chassis issues.
Repair:
Step-by-step instructions for component removal, overhaul, installation, and adjustment.
Disassembly Assembly:
Complete breakdown and reassembly procedures for all major mechanical and electrical components.
Engine Tuning:
Includes guidance on spark plug selection, ignition timing verification, and carburetor synchronization and jetting adjustments.
Wheel And Tire Service:
Information on wheel bearing maintenance, tire removal/installation, and correct tire pressures.
Depth:
Comprehensive, covering everything from basic user maintenance to advanced engine rebuilds and electrical diagnostics.
Wiring Diagrams:
Detailed, high-resolution wiring diagrams essential for electrical troubleshooting.
Engine Type:
398cc, 4-stroke, DOHC, air-cooled, inline-four cylinder
Bore X Stroke:
53.4 mm x 44.9 mm (typical for this engine configuration)
Compression Ratio:
9.7:1 (typical)
Horsepower Estimated:
Approx. 40-45 HP @ 9,000 RPM (estimated)
Torque Estimated:
Approx. 30-34 Nm @ 7,000 RPM (estimated)
Carburetor Type:
Twin Mikuni VM24SS or similar dual-throat carburetors (specified in manual)
Fuel Tank Capacity:
16 Liters (approx.)
Oil Type:
SAE 10W-40 API SE (specified in manual)
Oil Capacity:
3.0 Liters (with filter change, specified in manual)
Ignition Type:
Electronic Ignition (CDI)
Crash Test Data:
N/A (Motorcycle, pre-dates standardized motorcycle crash testing as known today)
Braking System:
Hydraulic disc brakes front and rear (typically single disc front, possibly drum or disc rear depending on exact spec).
Lighting:
Halogen headlight, taillight, brake light, turn signals.
Oil Change Interval:
Every 3,000-5,000 km or 6 months (typical for era).
Valve Clearance Check:
Every 6,000-10,000 km (specified in manual).
Chain Lubrication Adjustment:
Every 1,000 km or as needed.
Fork Oil Type:
Suzuki Fork Oil SAE 10W (or equivalent, specified in manual).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (specified in manual).
Gearbox Oil Type:
SAE 80W-90 API GL-4 (typical for manual transmissions, check manual for exact spec)
Carburetor Wear:
Diaphragms and seals in carburetors can degrade over time, requiring overhaul.
Cam Chain Tensioner:
Automatic cam chain tensioner can weaken or fail, leading to rattling noise and potential timing issues. Manual override or replacement may be needed.
Electrical Connectors:
Corrosion on electrical connectors can lead to intermittent faults.
Exhaust Leaks:
Gaskets at exhaust header joints can degrade, causing leaks.
Suzuki Motorsports:
Suzuki has a rich history in motorcycle racing, influencing the design and performance of their road bikes.
Gsx Lineage:
The GSX designation became synonymous with Suzuki's high-performance, DOHC four-valve-per-cylinder sportbikes, starting in the early 1980s.
Manufacturing Era:
Produced in the early 1980s, a period of rapid advancement in Japanese motorcycle technology.