Suzuki GT 125 Motorcycle 1974-1977 Service Repair Manual

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Art.-Nr: 113347

Stichworte: 1974 1975 1976 1977 GT 125 GT Series Motorcycle Motorcycles Suzuki

Produktvarianten

Beschreibung

The Suzuki GT 125, produced between 1974 and 1977, represents a notable entry in the 1970s lightweight motorcycle market. This air-cooled, twin-cylinder 2-stroke machine was engineered to offer a blend of sporty styling and reliable performance, appealing to riders seeking an engaging and economical option for both commuting and recreational use. Competing with other popular models of its era, the GT 125 was known for its accessible power delivery and the characteristic sound of its parallel-twin engine. Its design reflected the evolving aesthetic of the time, positioning it as a stylish and capable motorcycle within its displacement class. This comprehensive Service Repair Manual provides detailed information for the Suzuki GT 125, covering the years 1974 through 1977. The manual delves into all essential aspects of the motorcycle, including complete engine overhauls, fuel and ignition system servicing, transmission and clutch maintenance, and detailed procedures for the chassis, suspension, braking, and electrical systems. It also includes guidance on routine maintenance, troubleshooting common issues, and specific component repairs such as carburetor tuning and brake adjustments. With its clear text and high-resolution diagrams, this manual serves as an indispensable resource for owners, mechanics, and technicians aiming to maintain, repair, and optimize their Suzuki GT 125.

🏷️ Basic Information

Identification

Make:

Suzuki

Model:

GT 125

Model Variant:

GT125

Years Covered:

1974-1977

Codes

Engine Code Identifier:

GT125

👋 Introduction

Market Position

Era Context:

The Suzuki GT 125 was part of Suzuki's popular GT series, known for its sporty styling and reliable performance in the 1970s commuter and light sportbike segment.

Competitive Analysis

Competitors:

Competed against models like the Yamaha RD125, Kawasaki KH125, and Honda CB125S, offering a blend of performance and affordability.

Key Features

Motorcycle Appeal:

Appealed to riders seeking an economical, stylish, and engaging motorcycle for daily commuting and recreational riding.

📋 Manual Details

Coverage Areas

Manual Type:

Service Repair Manual

Language:

English

Page Count

Total Pages:

Format

File Format:

PDF (Assumed based on common digital manual distribution)

Print Quality:

High-resolution, clear diagrams and text (Assumed for quality manual)

Binding Type:

Digital Download (Assumed for sales business)

📖 Manual Coverage

Systems Covered

Engine System:

Complete engine overhaul, disassembly, assembly, tuning, and troubleshooting.

Fuel System:

Carburetor service, adjustment, and troubleshooting; fuel tank and petcock maintenance.

Ignition System:

Ignition timing, spark plug specifications, coil and CDI unit testing.

Transmission System:

Gearbox disassembly and reassembly, clutch operation, and gear selection adjustments.

Chassis And Suspension:

Front fork service, rear shock absorber maintenance, swingarm inspection, steering head bearing service.

Braking System:

Front and rear brake adjustment, shoe replacement, drum brake service.

Electrical System:

Wiring diagrams, lighting system service, battery maintenance, charging system testing.

Exhaust System:

Exhaust pipe and muffler inspection and replacement.

Wheel And Tire Service:

Spoke tensioning, tire replacement, wheel balancing (basic).

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, chain lubrication and adjustment, spark plug replacement.

Troubleshooting:

Diagnostic charts for common running issues, starting problems, and performance issues.

Engine Rebuilding:

Piston and cylinder replacement, crankshaft inspection, gasket replacement.

Carburetor Tuning:

Idle speed adjustment, main jet and pilot jet selection based on conditions.

Electrical Diagnostics:

Use of multimeters for circuit testing, continuity checks.

Clutch Adjustment:

Cable adjustment for proper engagement and disengagement.

Brake Adjustment:

Lever and pedal free play, drum brake shoe adjustment.

Frame And Bodywork:

Frame inspection, fairing/panel removal and installation (if applicable), seat repair.

Coolingsystem Service:

N/A (Air-cooled engine)

Exhaust System Maintenance:

Inspection for leaks, gasket replacement, muffler repack (if applicable).

Steering Head Service:

Inspection and lubrication/replacement of steering head bearings.

Wheel Bearing Service:

Inspection and lubrication/replacement of wheel bearings.

Cable Replacement:

Throttle, clutch, and brake cable inspection, adjustment, and replacement.

Lighting System Repair:

Headlight bulb replacement, taillight repair, turn signal troubleshooting.

Technical Depth

Depth Of Coverage:

Comprehensive; suitable for home mechanics and semi-professional use. Covers everything from basic maintenance to complete engine rebuilds and diagnostics.

📊 Manual Specifications

File Format

Digital Format:

Print Quality

Text Readability:

Clear and legible text for easy reading and comprehension.

Diagram Clarity:

High-resolution, detailed diagrams and exploded views for component identification and assembly guidance.

Binding Type

Delivery Method:

Instant Digital Download

Paper Type

Digital Paper Emulation:

Simulated glossy/matte paper texture for visual appeal in digital format.

⚙️ Engine Specifications

Primary Engine

Engine Type:

2-stroke, Air-cooled, Twin-cylinder

Displacement:

125cc

Bore X Stroke:

43.0 mm x 43.0 mm (Typical for this model, verify in manual)

Compression Ratio:

7.5:1 (Typical, verify in manual)

Starting System:

Kick Starter

Performance

Horsepower:

16.5 PS @ 8,500 rpm (Approximate, model year dependent, verify in manual)

Torque:

1.3 kg-m @ 8,000 rpm (Approximate, model year dependent, verify in manual)

Fuel System

Carburetor:

Dual Mikuni VM18 (Typical, verify in manual)

Fuel Delivery:

Petcock operated, gravity feed

Fuel Type:

Unleaded gasoline (typically 91 octane or higher for 2-stroke mix)

Lubrication

2-Stroke Oil Mixing:

Autolube (Oil injection system) or Pre-mix (Specify in manual)

🔧 Transmission

Standard

Transmission Type:

6-speed Constant Mesh

Clutch Type:

Wet, Multi-plate

Features

Gear Ratios:

Specific gear ratios detailed in manual.

Final Drive:

Chain Drive

📐 Dimensions

Exterior

Overall Length:

1965 mm (Approximate, verify in manual)

Overall Width:

745 mm (Approximate, verify in manual)

Overall Height:

1070 mm (Approximate, verify in manual)

Weights

Dry Weight:

128 kg (Approximate, verify in manual)

Fuel Tank Capacity:

14 Liters (Approximate, verify in manual)

🛡️ Safety Features

Ratings

Safety Standards:

Meets general safety standards of the era. Specific crash test ratings not applicable to this vintage motorcycle.

Active Features

Braking System Type:

Front: Drum; Rear: Drum

Lighting:

Headlight, Taillight, Turn Signals, Brake Light

💡 Technology Features

Infotainment

Infotainment Features:

N/A - Analog gauges (speedometer, tachometer, odometer) and indicator lights.

Driver Assistance

Driver Assistance Features:

N/A - Focus is on mechanical and basic electrical systems.

Connectivity

Connectivity Options:

🔧 Maintenance

Service Intervals

Oil Change Interval:

Refer to manual for specific interval based on mileage or time. Typically every 1,500-3,000 miles for 2-strokes or as per Autolube system recommendations.

Spark Plug Replacement:

Check and clean every 1,500 miles, replace every 6,000 miles (typical, verify in manual).

Chain Maintenance:

Lubricate and adjust every 500 miles or as needed. Replacement interval varies with use.

Fluid Specifications

Engine Oil Type:

2-stroke specific oil (e.g., Yamalube, Castrol, Motul) mixed with gasoline or for Autolube reservoir. Verify specific viscosity grade (e.g., SAE 20W-40 for Autolube) in manual.

Transmission Oil Type:

Refer to manual for transmission oil specification and capacity. Typically SAE 80W or 90W gear oil.

Known Issues

Common Problems:

Carburetor clogging due to old fuel, CDI unit failure, piston ring wear, oil leaks from crank seals, ignition coil degradation.

Preventative Maintenance:

Regular cleaning of carburetors, checking ignition components, ensuring proper fuel mixture and oil levels, and chain lubrication are crucial.

📚 Vehicle History

Brand Heritage

Suzuki Heritage:

Suzuki has a long history of producing reliable and innovative motorcycles, starting with their early lightweight models and evolving into a major global manufacturer.

Model Evolution

Gt Series Context:

The GT 125 was part of the GT (Grand Touring) series, which aimed to offer a blend of performance and comfort. It evolved from earlier Suzuki 125cc models, incorporating more modern styling and technology of the time.

Production

Manufacturing Origin:

Japan

🏆 Awards & Recognition

Recognitions

Historical Reputation:

Suzuki's GT series models were generally well-regarded for their performance and value within their class during the 1970s.