Suzuki GS250 GSX250 400 450 Twins Workshop Manual 1979 1980 1981 1982 1983 1984 1985

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Tipo: Motorcycle

Proveedor:

SKU: 129405

Etiquetas: 1979 1980 1981 1982 1983 1984 1985 400 Twins 450 Twins GS Series GS250 GSX250 Motorcycle Motorcycles Suzuki

Variantes de producto

Descripción

This manual covers a range of Suzuki GS and GSX twin-cylinder motorcycles produced during the early to mid-1980s. These models, including the GS250, GSX250, GS400, and GS450 Twins, are characterized by their air-cooled, four-stroke, parallel-twin engines, typically featuring dual carburetors and chain drive. Known for their reliability and accessible performance, these motorcycles were a significant part of Suzuki's lineup during this era, offering a solid platform for commuting and recreational riding. This workshop service repair manual provides comprehensive information to maintain and repair these classic machines. The purpose of this manual is to serve as a complete resource for owners, mechanics, and technicians, offering extensive A-Z coverage for all maintenance and repair procedures. It details engine overhaul, transmission and clutch service, electrical system diagnostics, and chassis components such as suspension and braking systems. The manual includes routine maintenance schedules, troubleshooting guides for common issues, and detailed technical specifications, including torque values and fluid recommendations. With detailed diagrams and instructions, this English-language manual aims to empower users to keep their Suzuki GS/GSX Twins in optimal working condition.

🏷️ Basic Information

Identification

Make:

Suzuki

Model:

GS450 Twins

Codes

Engine Codes:

Various GS series designations (e.g., GS250T, GSX250E, GS400E, GS450E, GS450L)

Generation

Generation Identifier:

Early to Mid-1980s Twin-Cylinder Motorcycle Era

👋 Introduction

Market Position

Target Audience:

Suzuki GS/GSX Twin motorcycle owners and independent repair shops seeking comprehensive service information.

Competitive Analysis

Value Proposition:

Offers a cost-effective alternative to official dealerships for repair and maintenance, providing identical technical data.

Key Features

Features:

Extensive coverage ('A-Z'), detailed pictures and diagrams, printable pages, digital instant delivery, lifetime usability.

Software Compatibility:

Works on any PC/MAC computer using Microsoft Windows (XP, NT, 2000, Vista, Windows 7, etc.).

📋 Manual Details

Coverage Areas

Coverage Years:

1979, 1980, 1981, 1982, 1983, 1984, 1985

Models Covered:

All GS250, GSX250, GS400, GS450 Twin variants and sub-models

Repair Scope:

Covers all repairs from routine maintenance to complete mechanical and electrical overhauls, presented in an easy-to-understand layout.

Page Count

Estimated Pages:

Extensive (Specific number not provided, but described as 'tons of detailed pictures & diagrams' and covering 'all repairs A-Z')

Manual Type

Type:

Workshop Service Repair Manual

Usage License:

Lifetime usability; manual will never time out or expire.

Language

Language:

English

Format

Format:

Digital (PDF)

📖 Manual Coverage

Systems Covered

Engine:

Complete engine overhaul, including cylinder head, valve train, engine block, lubrication system, intake, exhaust, cooling, fuel, emissions, ignition, and timing.

Transmission:

Manual transmission, clutch, and related drive components.

Electrical:

Comprehensive electrical system coverage, including wiring diagrams, ignition system, charging system, lighting, instrumentation, and starter system.

Chassis And Body:

Steering, suspension (front forks, rear shock absorbers), braking system (front and rear), wheels, tires, frame, and bodywork.

Engine Repair:

Specific engine repair procedures, including component replacement and rebuilding.

Air Conditioning:

N/A (Not applicable to motorcycles of this era).

Exhaust Emissions:

Covers exhaust system components and emission control systems relevant to the period.

Wiring Diagrams:

Detailed wiring diagrams for complete electrical system tracing and troubleshooting.

Procedures Included

Maintenance:

Routine maintenance, tune-up procedures, lubrication, fluid changes, filter replacements, chain adjustments, and general servicing.

Repair And Rebuild:

Engine removal/installation, complete engine rebuilding, transmission repair, carburetor overhaul, brake system overhaul, suspension servicing, and electrical component diagnosis and repair.

Troubleshooting:

Diagnostic procedures and solutions for common mechanical and electrical faults.

Technical Specifications:

Includes detailed torque specifications, valve timing marks, chain routing, sprocket/gear valve timing, tensioner adjustments, and release/reset methods.

Technical Depth

Depth:

Full A-Z coverage, encompassing detailed repair instructions, specifications, and diagnostic information suitable for both amateur and professional mechanics.

📊 Manual Specifications

File Format

Format:

Searchability:

Likely searchable text content due to PDF format, enabling quick access to specific information.

Delivery Method:

Super fast download delivery upon payment.

Print Quality

Printability:

All pages are printable, allowing users to print only necessary sections for workshop use.

Quality Standard:

Professional quality service and repair manuals.

Binding Type

Binding:

Digital download; no physical binding. User can print and bind as desired.

Paper Type

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Air-cooled, four-stroke, parallel-twin

Displacement 250Cc:

Approximately 247cc

Displacement 400Cc:

Approximately 399cc

Displacement 450Cc:

Approximately 448cc

Performance

Power Output:

Varies by specific model and year, typically ranging from 25-40 HP (approximate).

Torque:

Varies by specific model and year, typically in the 20-30 lb-ft range (approximate).

Fuel System

Carburetion:

Dual Mikuni VM series carburetors (typical, specific models may vary).

Fuel Type:

Unleaded gasoline (recommended octane rating to be specified in manual).

Fuel Delivery:

Mechanical fuel pump or gravity feed from tank (depending on specific model configuration).

Ignition

Ignition System:

CDI (Capacitor Discharge Ignition) with electronic advance (typical).

🔧 Transmission

Standard

Transmission Type:

Constant-mesh, 5 or 6-speed manual gearbox (specific models may vary).

Features

Clutch Type:

Wet, multi-plate clutch, cable-actuated.

Final Drive:

Chain drive.

📐 Dimensions

Exterior

Wheelbase:

Varies by model, typically around 1390-1430 mm (55-56 inches).

Weights

Dry Weight:

Varies by model, generally between 160-180 kg (350-400 lbs).

Fuel Tank Capacity:

Varies by model, typically around 12-16 liters (3.2-4.2 US gallons).

🛡️ Safety Features

Ratings

Safety Features Overview:

As a vintage motorcycle, safety features are primarily mechanical (e.g., reliable braking systems, robust frame construction). Modern safety systems like ABS or SRS are not applicable.

Active Features

Braking System:

Front disc brake, rear drum brake (common configurations; some later models may have dual front discs or rear discs depending on variant).

Passive Features

Lighting:

Halogen headlight, taillight, brake light, turn signals.

💡 Technology Features

Infotainment

Instrumentation:

Analog speedometer, tachometer, odometer, trip meter, neutral indicator, turn signal indicators, high beam indicator, oil pressure warning light (specifics vary by model).

Driver Assistance

Not applicable to this era of motorcycle.

Connectivity

Not applicable to this era of motorcycle.

🔧 Maintenance

Service Intervals

Oil Change:

Recommended every 3,000-5,000 km (1,800-3,000 miles) or 6 months, whichever comes first (specific interval in manual).

Valve Adjustment:

Typically recommended every 6,000-10,000 km (3,700-6,200 miles) or annually (specific interval in manual).

Spark Plug Replacement:

Recommended every 10,000-15,000 km (6,200-9,300 miles) or as per manual specifications.

Fluid Specifications

Engine Oil:

SAE 10W-40 or 20W-50 API SE, SF, or SG classification (verify specific viscosity and API rating in manual).

Brake Fluid:

DOT 3 or DOT 4 hydraulic brake fluid (verify specific type in manual).

Fork Oil:

Specific viscosity fork oil (e.g., 10W) to be detailed in the manual, capacity per fork leg is critical.

Gearbox Oil:

Specific gear oil viscosity and type as recommended by Suzuki for these transmissions (detailed in manual).

Known Issues

Common Problems:

Carburetor synchronization issues, aging electrical components (e.g., rectifier, CDI), potential wear in the cam chain tensioner mechanism, fork seal leaks, and general wear and tear on vintage components.

📚 Vehicle History

Brand Heritage

Manufacturer:

Suzuki Motor Corporation, a Japanese manufacturer renowned for motorcycles, automobiles, and marine engines.

Model Evolution

Gsx Gs Lineage:

The GS and GSX series represented Suzuki's entry into the popular multi-cylinder motorcycle market of the late 1970s and early 1980s, evolving from single and twin-cylinder designs to inline-fours.

Production

Production Period:

The GS250/GSX250, GS400, and GS450 twin-cylinder models were primarily produced in the late 1970s and early to mid-1980s, leading up to the dominance of Suzuki's four-cylinder GSX models.

🏆 Awards & Recognition

Recognitions

Historical Reputation:

Suzuki's GS/GSX twins were generally well-regarded for their reliability, accessible performance, and good value for money in their respective market segments.