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Suzuki

Suzuki GN400 Wiring Diagram

Suzuki GN400 Wiring Diagram

$16.99
$16.99
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Vehicle data plateRef 194121
Brand
Suzuki
Vehicle
Motorcycle
Models covered
GN400, Maruti Suzuki
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Suzuki
Model:
GN400
Engine Type:
Four-stroke, SOHC, single-cylinder
Engine Displacement:
399 cc (24.3 cu in)
Cooling System:
Air-cooled
Power Method:
Belt drive
Generation
Production Years:
1980-1985 (estimated range, specific year for this manual is not explicitly stated but implied to be within this generation)
Codes
Vin Designation:
Typically starts with 'JS1' for Suzuki
👋 Introduction
Market Position
Target Audience:
Suzuki GN400 owners, independent motorcycle repair shops, DIY enthusiasts with basic mechanical and electrical aptitude.
Competitive Analysis
Value Proposition:
Provides essential technical information that mirrors what professional workshops use, enabling cost savings on repairs and diagnostics. Fills the gap for specialized electrical troubleshooting guidance for this specific model.
Key Features
Diagnostic Aid:
Crucial tool for diagnosing electrical issues, which are often complex and require precise understanding of the wiring layout.
Repair Efficiency:
Speeds up the repair process by clearly indicating component locations, wire paths, and color codes.
Educational Value:
Empowers owners with the knowledge to understand and maintain their motorcycle's electrical system, fostering a deeper connection with their machine.
📋 Manual Details
Coverage Areas
Engine:
Complete engine systems, ignition, starting, charging, fuel system, lubrication, cooling.
Transmission:
Gearbox operation, clutch, internal components.
Chassis:
Frame, suspension (front and rear), steering, wheels, brakes (front and rear), exhaust system.
Electrical System:
Full wiring diagram, lighting, battery, starter motor, charging system (alternator/stator, rectifier/regulator), ignition system, switches, instrumentation, horn, starter relay.
Page Count
Estimated Pages:
Variable, typically 20-50 pages for a focused wiring diagram supplement, but can be integrated into a larger service manual.
Manual Type
Type:
Wiring Diagram / Electrical Service Manual
Language
Language:
English (implied by product description and common industry practice for global markets)
Format
Format:
Digital (PDF) - indicated by 'what will be send to you'
📖 Manual Coverage
Systems Covered
Electrical Components:
All electrical components from front to back, including but not limited to: headlight, taillight, turn signals, brake light switch, neutral indicator light, oil pressure warning light, speedometer illumination, tachometer illumination, ignition coil, spark plug, starter solenoid, battery terminals, fuse box, main switch, various relays, wiring harnesses, connectors, ground points.
Procedures Included
Troubleshooting:
Diagnostic procedures for electrical faults, identifying shorts, open circuits, poor connections, and component failures based on the wiring layout.
Repair:
Guidance on repairing or replacing electrical components, wiring harnesses, connectors, and fuses.
Installation:
Correct routing and connection of wiring for factory components and potentially aftermarket accessories.
Technical Depth
Depth:
Detailed, allowing for identification of specific wires, their functions, colors, and routing. Includes component identification and terminal locations. Sufficient for basic to intermediate electronic knowledge to understand and perform repairs.
📊 Manual Specifications
File Format
Digital Format:
Portable Document Format (PDF)
Searchability:
Likely text-searchable if generated from a digital source, enhancing usability for finding specific components or wire colors.
Print Quality
Print Readability:
Designed to be clear and legible when printed, with distinct line work and labeling for diagrams.
Binding Type
Digital Access:
Downloadable file, no physical binding.
Paper Type
Digital Display:
Optimized for digital display on various screen sizes and for printing on standard paper sizes (A4/Letter).
⚙️ Engine Specifications
Primary Engine
Bore X Stroke:
74.0 mm x 77.0 mm (approximate, common for 400cc singles of the era)
Compression Ratio:
9.0:1 (typical for this engine family)
Ignition System:
CDI (Capacitor Discharge Ignition) with electronic advance (typical for this era)
Performance
Horsepower:
Approx. 25-30 HP at 6,000-7,000 RPM (estimated, performance varied by tuning and market)
Torque:
Approx. 23-26 lb-ft at 4,000-5,000 RPM (estimated)
Fuel System
Carburetion:
Single Mikuni VM34SS carburetor (common specification)
Fuel Type:
Unleaded gasoline
Fuel Capacity:
17 Liters (approx. 4.5 US gallons)
🔧 Transmission
Standard
Type:
5-speed constant mesh
Clutch:
Wet multi-plate
Features
Final Drive:
Chain drive (though some models had belt drive, the product description mentions belt drive for power, which is unusual for GN400; this might be a misstatement or refer to a specific variant. Standard GN400 used chain drive.)
Gear Ratios:
Specific ratios not detailed here, but typical for a cruiser/standard motorcycle of its displacement.
📐 Dimensions
Exterior
Length:
Approx. 2200 mm (86.6 in)
Width:
Approx. 800 mm (31.5 in)
Height:
Approx. 1150 mm (45.3 in)
Weights
Dry Weight:
Approx. 170 kg (375 lbs)
Gross Vehicle Weight Rating:
Not specified, but typical for the class.
🛡️ Safety Features
Ratings
Crash Test Data:
Not applicable to motorcycles of this era.
Active Features
Braking System Front:
Disc brake
Braking System Rear:
Drum brake
Passive Features
Lighting System:
Halogen headlight, incandescent taillight and turn signals (standard for the era).
💡 Technology Features
Infotainment
System:
Not applicable. This is a classic motorcycle with purely functional instrumentation.
Driver Assistance
Features:
None. Focus is on mechanical and electrical systems.
Connectivity
Features:
None.
🔧 Maintenance
Service Intervals
Oil Change:
Every 3,000 km (1,800 miles) or 6 months
Air Filter Cleaning:
Every 6,000 km (3,600 miles)
Spark Plug Replacement:
Every 12,000 km (7,200 miles)
Valve Clearance Check:
Every 12,000 km (7,200 miles)
Fluid Specifications
Engine Oil Type:
SAE 10W-40 API SE or SF (Suzuki recommends)
Engine Oil Capacity:
1.8 Liters (with filter change)
Brake Fluid Type:
DOT 3 or DOT 4 (for disc brake systems)
Known Issues
Electrical:
Degradation of wiring insulation, corroded connectors, failing rectifier/regulator, starter motor brush wear, ignition coil failure.
Engine:
Cam chain wear, carburetor jetting issues, potential for oil leaks from case seals.
Chassis:
Wear in suspension bushings, brake system maintenance (fluid flush, pad replacement).
📚 Vehicle History
Brand Heritage
Manufacturer:
Suzuki Motor Corporation, Japan.
Model Evolution
Segment:
The GN400 was part of Suzuki's range of versatile single-cylinder motorcycles, often positioned as a reliable and accessible machine for commuting and light touring, with styling that leaned towards a classic or custom look.
Production
Manufacturing Location:
Japan (primary)
🏆 Awards & Recognition
Recognitions
Industry Awards:
Specific awards for the GN400 model are not widely documented, but Suzuki motorcycles of this era were generally recognized for reliability and value.
Ratings
Owner Satisfaction:
Generally positive for its intended purpose as a reliable workhorse.
Certifications
Manufacturing Standards:
Manufactured to Japanese quality standards prevailing during the production period.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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