🏷️ Basic Information

Make:

Suzuki

Model:

GN125

Product Type:

Parts List

Common Codes Or Variants:

GN125E, GN125F, GN125G, GN125H, GN125J, GN125K, GN125L, GN125M, GN125N, GN125P, GN125R, GN125S, GN125T, GN125V, GN125W, GN125X

👋 Introduction

Market Position:

The Suzuki GN125 has historically been a popular entry-level motorcycle, particularly in emerging markets and for riders seeking an economical, reliable, and easy-to-maintain machine for urban commuting and light touring. Its simplicity and robust design have made it a favored choice for both new riders and experienced mechanics.

Competitive Analysis:

Competed directly with other 125cc class motorcycles from manufacturers like Honda (CG125 series), Yamaha (YBR125), and Kawasaki. The GN125 often distinguished itself with its classic styling and the availability of robust parts support.

Key Features:

Iconic cruiser styling, user-friendly ergonomics, reliable single-cylinder engine, accessible maintenance, durable construction, cost-effective operation.

📋 Manual Details

Covered Areas:

Engine, Chassis, Electrical System, Fuel System, Carburetor, Ignition System, Transmission, Suspension, Brakes, Wheels, Tires, Frame, Bodywork, Controls, Lighting, Instruments

Page Count:

Estimated 150-250 pages (typical for a comprehensive parts list)

Manual Type:

Parts Catalog / Parts List

Language:

English

Format:

PDF (Digital Download)

📖 Manual Coverage

Systems Covered:

Engine (internal components, cylinder head, crankcase, piston, crankshaft, camshaft), Fuel System (tank, petcock, fuel lines, carburetor), Ignition System (CDI, coil, spark plug), Transmission (gearbox, clutch, shift mechanism), Chassis (frame, swingarm, linkages), Suspension (front fork, rear shock absorbers), Brakes (front and rear calipers, master cylinders, discs, drums), Electrical System (wiring harness, battery, lighting, starter, alternator), Wheels and Tires (rims, spokes, hubs, tire sizes), Controls (handlebars, levers, cables, pedals), Bodywork (fenders, fuel tank, seat, side covers, fairings), Exhaust System, Drive Train (chain, sprockets)

Procedures Included:

Identification of all genuine Suzuki GN125 parts by part number, exploded view diagrams of each major assembly, cross-referencing of superseded part numbers, component breakdowns for servicing and replacement.

Technical Depth:

Component-level identification and part number specification for accurate ordering and replacement. Provides visual and numerical reference for all factory-supplied parts.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High-resolution, optimized for digital viewing and printing.

Binding Type:

Not Applicable (Digital Download)

Paper Type:

Not Applicable (Digital Download)

⚙️ Engine Specifications

Engine Type:

Four-stroke, SOHC, single-cylinder, air-cooled

Bore X Stroke:

57.0 mm x 48.8 mm (typical)

Displacement:

124 cc

Compression Ratio:

9.2:1 (typical)

Horsepower:

Approx. 12-14 HP @ 8000-9000 RPM (varies by market and emission regulations)

Torque:

Approx. 9-10 Nm @ 7000-7500 RPM (varies by market and emission regulations)

Fuel Delivery:

Carburetor (e.g., Mikuni VM20SS or similar)

Fuel Type:

Unleaded gasoline

Oil Type:

SAE 10W-40 API SG or higher motorcycle oil

Oil Capacity:

Approx. 1.4 liters (with filter change)

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet multi-plate

Final Drive:

Chain drive

Gear Ratios:

Specific ratios vary by model year, but typically geared for city commuting.

📐 Dimensions

Length:

Approx. 2000-2100 mm (varies by variant)

Width:

Approx. 750-800 mm (varies by variant)

Height:

Approx. 1050-1100 mm (varies by variant)

Wheelbase:

Approx. 1320-1335 mm

Dry Weight:

Approx. 110-120 kg

Gross Vehicle Weight Rating:

Typically around 250-280 kg

Cargo Capacity:

N/A (motorcycle)

🛡️ Safety Features

Safety Ratings:

Not applicable for historical motorcycles in the same way as modern cars.

Active Safety Features:

Front disc brake, rear drum brake, reliable handling characteristics.

Passive Safety Features:

Sturdy frame construction, rider positioning.

💡 Technology Features

Infotainment Systems:

N/A (basic instrumentation: speedometer, odometer, neutral indicator, turn signal indicators).

Driver Assistance Features:

N/A (motorcycle).

Connectivity Features:

N/A (motorcycle).

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 km or 6 months, whichever comes first.

Air Filter Cleaning Replacement:

Clean every 2,000-3,000 km, replace as needed.

Spark Plug Replacement:

Inspect every 3,000-5,000 km, replace as needed or every 10,000-15,000 km.

Chain Lubrication Adjustment:

Lubricate every 500-1,000 km, adjust slack as needed (typically 15-25mm).

Valve Clearance Adjustment:

Inspect every 8,000-10,000 km.

Brake Fluid Type:

DOT 3 or DOT 4 (check specific model year requirements)

Fork Oil Type Viscosity:

SAE 10W or equivalent motorcycle fork oil

Transmission Oil Capacity:

Approx. 1.0 liters (for gearbox and clutch)

Common Issues:

Carburetor jetting and cleaning for performance, clutch wear, electrical connections corrosion, suspension seal leaks, carburetor float bowl leaks, rear shock absorber degradation over time.

Part Number Format:

Suzuki uses a specific alphanumeric part number system (e.g., 11241-03D00 for a gasket).

📚 Vehicle History

Brand Heritage:

Suzuki has a long and distinguished history in motorcycle manufacturing, known for producing reliable and performance-oriented vehicles across various segments.

Model Evolution:

The GN125 was introduced in the early 1980s and remained in production for many years, with incremental updates to styling, emissions controls, and minor mechanical refinements across different model designations (E, F, G, H, J, K, L, M, N, P, R, S, T, V, W, X) to adapt to market demands and regulations. It adopted the classic cruiser styling that made it popular.

Production Period:

Early 1980s to early 2000s (major production, with some variants continuing longer in certain markets).

Manufacturing Locations:

Japan (primary), and licensed manufacturing in various countries including China, Pakistan, and India.

🏆 Awards & Recognition

Industry Recognitions:

The GN125 has been widely recognized for its durability, affordability, and ease of maintenance, making it a staple in many markets. Specific awards are rare for this type of utility motorcycle.