Suzuki GSF650S User Manual (English)

Rachel HarrisonJul 26, 2025

Why does my Suzuki GSF650S Motorcycle battery run down quickly?

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Lindsay WyattJul 26, 2025
If your Suzuki Motorcycle's battery runs down quickly, it could be due to several reasons. Excessive electricity usage from accessories might be the cause, so try removing them. Alternatively, current leakage could be the issue, potentially stemming from a short circuit in the wire harness, loose or disconnected wires, or a faulty battery. Issues with the charging voltage, such as a faulty battery or abnormal driving conditions, can also lead to this problem. Other potential causes include a faulty stator coil, disconnected lead wires, faulty slip ring(s) and/or brush(-es), a faulty rectifier and/or IC regulator, a short circuit in the wire harness, or poor contact of couplers.

Suzuki GSF650S Specifications

General

Engine Type	4-stroke, 4-cylinder, liquid-cooled, DOHC
Bore x Stroke	65.5 mm x 48.7 mm
Compression Ratio	11.5:1
Fuel System	Fuel injection
Ignition	Electronic ignition (transistorized)
Transmission	6-speed constant mesh
Final Drive	Chain
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Displacement	656 cm³
Front Brakes	Disc
Rear Brakes	Disc
Front Tire	120/70ZR17
Rear Tire	160/60ZR17
Fuel Tank Capacity	19 liters
Seat Height	790 mm

Summary

General Information Overview

General Information Warnings and Precautions

Highlights critical warnings, cautions, and general safety precautions for motorcycle service.

Fuel and Oil Recommendations

Specifies recommended fuel grades, engine oil, and fork oil for optimal performance.

Motorcycle Specifications

Details key technical specifications including dimensions, engine, and drive train data.

Periodic Maintenance Schedule and Procedures

Periodic Maintenance Schedule and Chart

Outlines recommended service intervals and tasks for regular maintenance.

Lubrication Points Guide

Identifies major lubrication points on the motorcycle for smooth operation and longevity.

Engine Oil and Oil Filter Service

Provides procedures for engine oil and oil filter replacement, including specifications.

Brake System Maintenance

Details inspection and maintenance procedures for the front and rear brake systems.

Engine Service and Overhaul

Engine Removal and Installation Procedures

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

Engine Disassembly Steps

Provides a systematic breakdown of the engine for inspection and servicing.

Camshaft and Cylinder Head Service

Details inspection and servicing procedures for camshafts and cylinder head components.

Engine Reassembly Guide

Instructions for reassembling the engine components in the correct order.

Engine Lubrication System Overview

Explains the engine lubrication system, including oil pump and oil filter service.

Fuel System Components and Service

Fuel Tank Removal and Installation

Procedure for removing and reinstalling the fuel tank, including safety warnings.

Carburetor Construction and Specifications

Details the construction and technical specifications of the carburetor system.

Carburetor Disassembly and Cleaning

Step-by-step guide for disassembling, cleaning, and inspecting carburetor components.

Carburetor Reassembly and Synchronization

Instructions for reassembling carburetors and synchronizing them for optimal performance.

Chassis Components and Maintenance

Front Wheel Removal and Inspection

Procedure for removing, inspecting, and disassembling the front wheel assembly.

Front Fork Disassembly and Service

Detailed steps for disassembling, inspecting, and servicing the front fork components.

Handlebars and Steering System Adjustment

Covers the construction, removal, and adjustment procedures for handlebars and steering.

Rear Wheel Installation and Maintenance

Procedure for removing, inspecting, and installing the rear wheel and related components.

Front Brake System Service

Details the construction, maintenance, and service procedures for the front brake system.

Electrical System Components and Service

Battery Maintenance and Charging

Covers battery specifications, initial charging, servicing, and recharging operations.

Charging System Description and Inspection

Explains the generator's charging system and provides inspection procedures.

Generator Removal, Disassembly, and Inspection

Detailed steps for removing, disassembling, and inspecting the generator components.

Starter System and Ignition Interlock Operation

Describes the starter system and side-stand/ignition interlock system functionality.

Ignition System Operation and Troubleshooting

Explains the ignition system and provides troubleshooting steps for no or poor spark.

Servicing Information and Technical Data

Engine Troubleshooting Guide

Lists common engine complaints, their possible causes, and recommended remedies.

Carburetor Troubleshooting

Addresses starting difficulties, idling issues, and fuel level fluctuations in the carburetor.

Chassis Troubleshooting

Covers issues like steering heaviness, wheel wobbles, and suspension noise.

Electrical System Troubleshooting

Diagnoses common electrical problems such as no spark, battery issues, and charging faults.

Wiring Diagrams

Provides detailed wiring diagrams for GSF650 and GSF650S models.

Special Tools List

Catalog of special tools required for various maintenance and repair procedures.

Service Data Specifications

Comprehensive list of standard and limit values for engine, chassis, and electrical components.

Suzuki GSF650S User Manual

Table of Contents

Questions and Answers: