Suzuki EN125-2A User Manual (English)

Questions and Answers:

J
John FloresJul 27, 2025
Why is my Suzuki Motorcycle engine hard to start or not starting at all?
- R
  Robert WilliamsJul 27, 2025
  If your Suzuki Motorcycle engine is hard to start or won't start, it could be due to several reasons. The compression might be too low, requiring adjustment, repair, or replacement. Alternatively, the plug might not be sparking, in which case you should clean or replace it. Another possibility is that no fuel is reaching the carburetor, suggesting it needs to be cleaned or replaced.
B
Brandi KingAug 6, 2025
What to do if my Suzuki EN125-2A battery runs down quickly?
- R
  Robert HudsonAug 6, 2025
  If your Suzuki Motorcycle battery is draining quickly, consider these steps: Check the generator, regulator/rectifier, and circuit connections, making necessary adjustments to achieve the specified charging operation. It may also be necessary to replace the battery and correct the charging system. You might also try fully recharging the battery and adjusting the electrolyte specific gravity (S.G.). Replacing the electrolyte, recharging the battery, and adjusting the S.G. could also resolve the issue. Ensure the battery is properly connected, and if the issue persists, replace the battery.
V
Vanessa TerrellAug 17, 2025
How to fix a noisy engine on a Suzuki EN125-2A Motorcycle?
- P
  Philip MunozAug 17, 2025
  If your Suzuki Motorcycle engine is noisy, the cause could be: * Excessive valve chatter: Adjust the valves. * Noise from piston: Clean the piston. * Noise from clutch: Replace the clutch. * Noise from crankshaft: Replace the crankshaft. * Noise from transmission: Replace the transmission.

Suzuki EN125-2A Specifications

General

Brand	Suzuki
Model	EN125-2A
Category	Motorcycle
Language	English

Summary

Foreword

General Information

Safety Warnings and Precautions

Details on warnings, cautions, and general safety precautions for servicing.

Serial Number Locations

Information on where to find serial numbers for registration and parts ordering.

Fuel and Oil Recommendations

Recommended fuel octane and engine oil specifications.

Break-in Procedure

Guidelines for engine break-in to ensure optimal performance and reliability.

Special Feature

Explanation of the electronic timing advance system for improved performance.

Special Materials for Maintenance

List of specific materials and their part numbers for maintenance tasks.

Specifications Summary

Overview of motorcycle dimensions, engine, and transmission specifications.

Periodic Maintenance and Tune-Up Procedures

Periodic Maintenance Schedule

Recommended intervals for periodic service work to maintain peak performance and economy.

Periodic Lubrication Chart

Maintenance schedule based on odometer indication for economical motorcycle maintenance.

Maintenance Procedures

Detailed steps for performing various maintenance tasks on the motorcycle.

Engine

Compression Pressure and Oil Pressure

Procedures for testing engine compression and oil pressure.

Engine Removal and Remounting

Step-by-step guide for removing and installing the engine from the motorcycle.

Upper End Components Disassembly

Instructions for disassembling cylinder head and related upper engine components.

Upper End Components Inspection and Servicing

Procedures for inspecting and servicing upper engine parts like camshaft and valves.

Upper End Components Reassembly

Guide for reassembling the upper end components of the engine.

Lower End Components Disassembly

Instructions for disassembling magneto rotor, starter clutch, and other lower engine parts.

Lower End Components Inspection and Servicing

Procedures for inspecting and servicing lower engine components like conrod and crankshaft.

Lower End Components Reassembly

Guide for reassembling the lower end components of the engine.

Fuel and Lubrication System

Fuel Cock

Information on cleaning, disassembly, and mounting of the fuel cock.

Carburetor

Details on carburetor construction, specifications, and components.

Lubrication System

Diagram illustrating the motorcycle's oil lubrication flow paths.

Chassis

Front Wheel

Details on front wheel removal, disassembly, inspection, and reassembly.

Front Fork

Instructions for front fork removal, disassembly, inspection, and reassembly.

Steering Stem

Procedures for steering stem removal, inspection, and reassembly.

Front Brake

Details on front brake caliper and master cylinder removal, inspection, and reassembly.

Rear Wheel and Rear Brake

Procedures for rear wheel and rear brake disassembly, inspection, and reassembly.

Rear Swing Arm

Instructions for rear swing arm removal, inspection, and reassembly.

Electrical System

Ignition System

Explanation of the full-transistorized ignition system and its components.

Charging System

Description and function of the charging system, including AC generator and regulator.

Starter System

Overview of the starter system components and their operation.

Combination Meter

Instructions for combination meter removal and inspection.

Lights

Details on headlight, tail/brake, and turn signal light components.

Switches

Inspection of various handlebar and other electrical switches for continuity.

Battery

Specifications, initial charging, and servicing procedures for the motorcycle battery.

Servicing Information

Troubleshooting

Troubleshooting guide for common engine, carburetor, electrical, and chassis issues.

Special Tools

List of special tools required for maintenance and repair, with part numbers.

Tightening Torque

Reference tables for engine and chassis component tightening torques.

Service Data

Technical specifications and limits for engine, transmission, and brake components.

Wire and Cable Routing

Diagrams showing the proper routing of electrical wires and cables.

Wiring Diagram

Complete electrical wiring diagram of the motorcycle.

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Suzuki EN125-2A User Manual

Table of Contents