Target Audience:
DIY enthusiasts, home mechanics, professional technicians
Value Proposition:
High quality, complete, accurate, official information for DIY repair, avoiding inferior/incomplete manuals
Delivery:
Instant download link after payment, no restrictions on use
Customer Support:
Customer satisfaction guaranteed, issues resolved within hours via email
Engine Systems:
Engine disassembly, reassembly, complete engine service, engine removal, fuel system, lubrication system, cooling system, timing chain service, exhaust system
Drivetrain Systems:
Transmission service, gearbox service, gearbox removal and installation, clutch removal and installation, U-joint service procedures (if applicable to model), CV joint service procedures (if applicable to model)
Chassis Systems:
Chassis assembly, wheels, brakes, steering, suspension (front and rear), axles
Electrical Systems:
Ignition, charging system, starter system, battery, switches, wiring diagrams, wire/cable/hose routing
Bodywork And Fittings:
Bodywork
Maintenance Procedures:
Periodic maintenance, tune-up procedures, factory maintenance schedules
Repair Procedures:
All factory repair procedures, diagnostic and repair procedures, fault finding, carburetor rebuild and adjustments, brake servicing procedures
Rebuild Procedures:
Engine rebuild, carburetor rebuild
Depth:
Comprehensive (covers DIY repair, professional technician level)
Detail Level:
Highly detailed, abundant illustrations, lots of pictures & diagrams
Cross Platform Compatibility:
Windows/Mac/Linux
Digital Viewing:
Viewable on Laptop/Tablet
Binding:
Not applicable (digital download)
Paper Quality:
Not applicable (digital download)
Completeness:
100% Complete, Absolutely No Missing Pages, No Missing, Corrupt Pages or Sections
Authenticity:
Official Service Information, Factory Repair Manuals (used by dealers)
Engine Type:
Liquid-cooled, 4-stroke, DOHC, 4-valve, Inline-4
Displacement:
398 cc (exact cubic centimeters may vary slightly by specific model variant, but this is the standard for the 400cc class)
Bore X Stroke:
Typically 53.0 mm x 46.8 mm (based on common specifications for this engine) - manual will confirm exact values.
Compression Ratio:
Typically around 11.0:1 (manual will confirm exact values)
Horsepower:
Typically in the 53-59 HP range at around 11,000-12,000 RPM (specific figures vary by market and model year, confirmed in manual).
Torque:
Typically around 34-37 Nm (3.5-3.8 kgf-m) at around 10,000 RPM (specific figures vary by market and model year, confirmed in manual).
Carburetion:
Constant Velocity (CV) carburetors, likely Mikuni BDST32 (4 x 32mm) or similar. Manual provides full rebuild and adjustment details.
Fuel Type:
Unleaded gasoline (manual will specify octane rating)
Fuel Capacity:
Typically 16 liters (4.2 US gallons) - manual will confirm exact capacity.
Oil Type:
Manual specifies required oil type, viscosity (e.g., SAE 10W-40), and API classification (e.g., SG or higher).
Oil Capacity:
Typically 3.5 liters with filter change (manual will confirm exact capacity and procedure).
Cooling Method:
Liquid-cooled (Radiator and fan)
Coolant Type:
Manual specifies correct coolant mixture (e.g., 50/50 ethylene glycol and distilled water).
Ignition Type:
Digital CDI (Capacitor Discharge Ignition) with electronic timing advance.
Spark Plugs:
Manual specifies correct spark plug type, gap, and torque (e.g., NGK CR9E or similar).
Firing Order:
1-2-4-3 (standard for inline-four engines of this era)
Gearbox Type:
Constant Mesh, 6-speed sequential
Optional Transmissions:
Not applicable for this model
Clutch Type:
Wet, multi-plate
Final Drive:
O-ring sealed chain drive
Gear Ratios:
Specific gear ratios for each of the 6 speeds will be detailed in the manual.
Fluid Type:
Manual specifies recommended gearbox oil type and viscosity (often SAE 80W-90 or similar for older manual transmissions, but specific to this Suzuki application).
Overall Length:
Specific dimensions will be in the manual, but generally around 2050 mm.
Overall Width:
Specific dimensions will be in the manual, but generally around 750 mm.
Overall Height:
Specific dimensions will be in the manual, but generally around 1160 mm.
Dry Weight:
Around 155 kg (specific dry weight will be in the manual).
Wet Weight:
Around 177 kg (fully fueled and with all fluids, specific wet weight will be in the manual).
Weight Distribution:
The manual may provide insights into typical weight distribution for handling characteristics.
Safety Ratings:
Not applicable to motorcycle safety ratings in the same way as cars (e.g., NHTSA, Euro NCAP). Focus is on mechanical safety.
Braking System Front:
Dual disc brakes with twin-piston calipers. Manual provides detailed servicing procedures.
Braking System Rear:
Single disc brake with single-piston caliper. Manual provides detailed servicing procedures.
Tire Specifications Front:
Commonly 110/80-17 or similar. Manual specifies exact size and recommended pressures.
Tire Specifications Rear:
Commonly 130/70-18 or similar. Manual specifies exact size and recommended pressures.
Frame Type:
Steel twin-spar (SAD - Steel Advanced Duralumin frame in Suzuki terminology) for rigidity and handling. Manual covers frame inspection and repair.
Suspension Front:
Telescopic forks with adjustable pre-load and damping. Manual details fork oil type, quantity, and service procedures.
Suspension Rear:
Monoshock (SU-SACS - Suzuki Advanced Cooling System) with adjustable damping and pre-load. Manual details shock absorber service.
Oil Change Interval:
Typically every 3,000-6,000 km or 6-12 months (manual will specify precise intervals).
Spark Plug Replacement Interval:
Typically every 12,000-24,000 km (manual will specify precise interval and gap checks).
Air Filter Cleaning Interval:
Regular checks, cleaning or replacement typically every 6,000-12,000 km (manual will specify).
Chain Maintenance:
Regular cleaning, lubrication, and adjustment (check manual for frequency and tension specifications).
Brake Fluid:
DOT 3 or DOT 4 recommended. Manual will confirm exact type and replacement interval.
Coolant Specifications:
50/50 mixture of ethylene glycol-based coolant and distilled water. Manual will confirm.
Common Wear Items:
Clutch plates, brake pads, fork seals, and drive chain/sprockets are common wear items requiring regular inspection and replacement. Carburetor synchronization can drift over time.
Potential Problems:
Overheating if cooling system is neglected, carburetor jetting issues, electrical connector corrosion.
Required Special Tools:
Manual will list essential tools, including torque wrenches, feeler gauges, carburetor synchronizer, and specific Suzuki factory tools if applicable.
Torque Specifications:
Extensive list of torque specifications for all critical fasteners and components throughout the motorcycle.
Manufacturer History:
Suzuki Motor Corporation, a Japanese multinational corporation, has a long history in motorcycle manufacturing, known for performance and innovation.
Gsx R Lineage:
The GSX-R line is Suzuki's flagship sportbike series, originating with the GSX-R400 and evolving into iconic larger displacement models like the GSX-R750 and GSX-R1100.
Manufacturing Location:
Japan (typical for Suzuki performance motorcycles of this era).
Production Period:
1984-1987 (for the GK71B/GK71F models covered by this manual).
Market Introduction:
The GSX-R400 was a significant model, often developed for specific markets like Japan to comply with engine displacement regulations for sportbike licensing.
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