This manual covers the sportbike models produced between 1984 and 1987. These motorcycles, known for their inline-four engines and agile handling, represent a significant era in Japanese sportbike development. The GSXR400, an early member of the renowned GSXR lineage, offers a compelling blend of performance and sportbike aesthetics, featuring approximately 398cc displacement and an estimated 50-59 horsepower. This publication is designed to provide comprehensive support for all engine types, trim levels, and transmission types within this specific production range, ensuring owners and technicians have access to detailed information for maintaining these iconic machines.
This workshop service repair manual provides extensive coverage of all essential vehicle systems and procedures. It details general information, fuel system, cooling system, engine top-end, clutch system, lubrication, engine removal and installation, crankshaft and transmission, wheels and tires, final drive, brakes, suspension, steering, frame, and electrical systems. The manual includes scheduled maintenance, troubleshooting guides, step-by-step repair instructions, disassembly and assembly procedures, and cleaning and reinstallation guidance. With hundreds of pages of detailed diagrams, drawings, photos, and integrated wiring information, this manual is an indispensable resource for owners and independent repair shops seeking to accurately maintain and repair their GSXR400.
Model:
GSXR400 (GSX-R400)
Model Code:
GK71A (early models), GK73A (later models within the specified range)
Production Years Covered:
1984, 1985, 1986, 1987
Engine Types Covered:
All
Transmission Types Covered:
All
Target Audience:
Owners and independent repair shops working on Suzuki GSXR400 models from 1984-1987.
Comparable Models:
Honda CB-1, Yamaha FZR400, Kawasaki ZXR400 (though ZXR typically later).
Manual Advantage:
Provides access to professional-level repair information, saving costs on dealership services.
Information Source:
Likely derived from official Suzuki factory service manuals, offering high accuracy.
Content Completeness:
Guaranteed complete and intact, covering all aspects of service, maintenance, and repair.
General Information:
Included
Engine Lubrication System:
Included
Engine Removal Installation:
Included
Crankshaft Transmission:
Included
Suspension System:
Included
Steering System:
Included
Electrical System:
Included
Estimated Pages:
Hundreds of pages (as per description)
Type:
Workshop Service Repair Manual
Origin:
Original Manufacturer's Manual (implied)
Delivery Method:
Instant Download
Printability:
Full Printable
Compatibility:
All Versions of Windows & Mac
Required Software:
Adobe PDF Reader & WinZip
Engine Systems:
Top-end components, lubrication, cooling, fuel delivery (carburetion), engine removal/installation.
Drivetrain Systems:
Clutch operation and service, transmission disassembly and assembly, final drive (chain and sprockets).
Chassis Systems:
Wheels, tires, brakes (hydraulic systems, caliper service, disc maintenance), suspension (forks, rear shock), steering mechanism.
Electrical Systems:
Complete wiring diagrams, ignition system, lighting, charging system, starting system, troubleshooting.
Maintenance:
Scheduled maintenance, fluid checks and changes, filter replacements, general upkeep.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
Repair:
Step-by-step repair instructions for all major components and systems.
Disassembly Assembly:
Detailed instructions for taking apart and reassembling vehicle components.
Cleaning Reinstallation:
Procedures for cleaning parts during service and correct reinstallation methods.
Diagnostic Capability:
Comprehensive diagnostic information used by professional technicians.
Repair Detail:
Detailed substeps, critical notes, cautions, and warnings for each repair procedure.
Illustrations:
Hundreds of pages of diagrams, drawings, photos, and enlarged inset views for clarity.
Wiring Information:
Detailed wiring diagrams integrated with electrical service procedures.
Searchability:
Likely searchable text (common for PDF manuals)
Print Capability:
High Quality, Full Printable
Digital Usability:
Printable sections for workshop use, avoiding damage to electronic file.
Binding:
N/A (Digital Download)
Paper Quality:
N/A (Digital Download)
Engine Layout:
Inline-four, liquid-cooled (most variants)
Displacement:
Approximately 398cc
Horsepower Estimate:
Around 50-59 HP (depending on specific market and tune)
Torque Estimate:
Varies, typically in the 30-35 lb-ft range.
Carburetion:
Likely multiple Mikuni carburetors (e.g., 32mm or 34mm CV or slide type).
Fuel Type:
Unleaded Gasoline
Oil Type Specification:
Likely SAE 10W-40 or 10W-50, API SG or higher (refer to manual for exact specification).
Oil Capacity:
Approximately 3.5 - 4.0 liters with filter change (verify in manual).
Transmission Type:
6-speed constant mesh
Clutch Type:
Wet, multi-plate
Transmission Fluid:
Motorcycle gear oil (e.g., SAE 80W-90) or specific transmission fluid (verify in manual).
Wheelbase:
Approx. 1390-1410 mm (dependent on specific model/year)
Dry Weight:
Around 160-170 kg (dependent on specific model/year)
Front Wheel Size:
16-inch (common for early models)
Rear Wheel Size:
17-inch (common for early models)
Front Tire Size Recommendation:
110/70-16 (typical for 16-inch front wheel)
Rear Tire Size Recommendation:
130/70-17 or 140/70-17 (typical for 17-inch rear wheel)
Crash Safety:
N/A (Motorcycle safety ratings differ from cars; manual focuses on mechanical safety).
Braking System:
Dual front discs, single rear disc with hydraulic actuation.
Frame Construction:
Steel twin-spar frame (typical for the era) providing structural integrity.
Infotainment System:
N/A (This era of motorcycle predates integrated infotainment systems).
Rider Aids:
None (ABS, traction control, etc., were not features on this model).
Connectivity Features:
N/A
Oil Change Interval:
Typically every 3,000-5,000 km or 6-12 months (refer to manual for exact Suzuki recommendations).
Air Filter Cleaning Replacement:
Check every 5,000-10,000 km, replace as needed or according to manual.
Spark Plug Replacement:
Typically every 10,000-20,000 km, depending on plug type.
Coolant Type:
Ethylene glycol-based antifreeze and distilled water mix (typically 50/50).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (verify specific recommendation in manual).
Common Wear Items:
Clutch plates, brake pads/discs, suspension seals, carburetor diaphragms.
Electrical Gremlins:
Age-related electrical connections (corrosion, loose contacts), rectifier/regulator issues.
Fuel System Maintenance:
Carburetor cleaning and synchronization due to age and potential fuel contamination.
Manufacturer:
Suzuki Motor Corporation
Gsxr Lineage:
The GSXR400 was an early entrant in Suzuki's renowned GSXR line, known for performance and sportbike styling.
Early Sportbike Era:
Represents a period of significant development in Japanese sportbike technology, featuring advanced engines and chassis for its time.
Manufacturing Location:
Japan
Motorcycle Press:
While specific awards for the GSXR400 from this period might be scarce in common recollection, the GSXR line itself garnered significant praise for its performance and handling.
Manual Quality:
Professional Quality, Highly Detailed
