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Yamaha SR400 User Manual

Yamaha SR400
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SR400
MOTORCYCLE
2RD-28199-E1
OWNER’S MANUAL
Read this manual carefully before oper-
ating this vehicle.
SR400
2RD-9-E1_hyoshi.indd 1 2015/09/16 13:46:32

Table of Contents

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Yamaha SR400 Specifications

General IconGeneral
Engine TypeAir-cooled, 4-stroke, SOHC, 2-valve
Displacement399cc
Bore x Stroke87.0 mm x 67.2 mm
Compression Ratio8.5:1
Fuel SystemFuel injection
Ignition SystemTCI
Starter SystemKick
Transmission5-speed
Final DriveChain
Front SuspensionTelescopic fork
Rear SuspensionSwingarm
Front BrakeHydraulic single disc
Rear BrakeDrum
Front Tire90/100-18M/C 54S
Rear Tire110/90-18M/C 61S
Fuel Tank Capacity12 liters
Seat Height785 mm
Wet Weight174 kg
Width750 mm
Length2085mm
Wheelbase1, 410 mm
Ground Clearance130 mm

Summary

Introduction to the Yamaha Owner's Manual

Important Manual Information

Understanding Manual Symbols and Notations

Explains the meaning of symbols and notations used in the manual.

Comprehensive Motorcycle Safety Guidelines

Owner Responsibilities for Safe Operation

Owner's duties and responsibilities for safe motorcycle usage.

Essential Safe Riding Practices

Key techniques and precautions for safe motorcycle riding.

Protective Apparel Recommendations

Guidelines for selecting and wearing appropriate rider protective gear.

Carbon Monoxide Poisoning Hazards

Awareness of carbon monoxide risks and necessary safety precautions.

Loading Cargo and Accessories Safely

Best practices for attaching cargo and accessories to maintain balance.

Motorcycle Transport Safety Procedures

Instructions for securely and safely transporting the motorcycle.

Motorcycle Description

Motorcycle Component Identification: Left View

Identifies key components visible from the motorcycle's left side.

Motorcycle Component Identification: Right View

Identifies key components visible from the motorcycle's right side.

Controls and Instruments Layout Overview

Diagram and labels for the motorcycle's handlebar controls and instruments.

Instrument and Control Functions

Main Switch, Steering Lock, and Parking Mode

Operation of the ignition switch and steering lock mechanism.

Dashboard Indicators and Warning Lights

Explanation of dashboard indicator lights and warning signals.

Gauges: Speedometer, Tachometer, and Tripmeter

Understanding the vehicle's speed, distance, and engine speed gauges.

Handlebar Controls: Switches, Levers, and Pedals

Operation of all handlebar-mounted switches, levers, and pedals.

Fuel System Controls: Tank Cap, Cock, and Hose

How to operate the fuel tank cap, fuel cock, and check the fuel hose.

Engine Starting Mechanisms: Kickstarter and Decompression

Procedure for starting the engine using the kickstarter mechanism.

Seat and Suspension Adjustment

Steps for seat removal and adjusting rear shock absorber preload.

Sidestand and Ignition Circuit Cut-off System

Sidestand operation and the safety function of the ignition cut-off system.

Pre-Operation Safety Checks

Essential Pre-Ride Inspection Checklist

A comprehensive list of checks to ensure safe operating condition before riding.

Operation and Riding Points

Starting the Engine Safely

Step-by-step guide for starting the motorcycle's engine.

Troubleshooting Engine Starting Issues

Common problems and solutions when the engine fails to start.

Gear Shifting Techniques and Recommendations

Proper methods for shifting gears for acceleration and deceleration.

Tips for Improving Fuel Consumption

Riding habits and techniques to enhance fuel efficiency.

Engine Break-In Procedure and Guidelines

Critical steps for the initial engine break-in period to ensure longevity.

Safe Motorcycle Parking Practices

Guidelines for safely parking the motorcycle, considering heat and stability.

Periodic Maintenance and Adjustment

Owner's Tool Kit and Maintenance Schedules

Contents of the owner's tool kit and overview of maintenance schedules.

Emission Control System Maintenance

Maintenance tasks specific to the motorcycle's emission control system.

General Maintenance and Lubrication Chart

A comprehensive schedule for routine maintenance and lubrication tasks.

Spark Plug and Air Filter Element Service

How to inspect/replace spark plugs and air filter elements.

Engine Oil and Filter Element Servicing

Procedures for checking engine oil level and replacing the oil filter.

Wheel and Tire Maintenance Procedures

Inspection of tires, checking air pressure, and spoke wheel care.

Brake System Maintenance and Checks

Procedures for checking brake pads, fluid, levers, and pedals.

Drive Chain Maintenance: Slack, Cleaning, Lubrication

How to adjust chain slack and properly clean and lubricate the drive chain.

Battery Care, Charging, and Storage

Guidelines for maintaining battery health and proper storage.

Fuse Replacement and Bulb Changes

How to replace fuses and various light bulbs on the motorcycle.

Wheel Removal and Installation Procedures

Detailed procedures for removing and installing the front and rear wheels.

Troubleshooting Charts and Procedures

Systematic approach to diagnosing and resolving common motorcycle issues using charts.

Motorcycle Care and Storage

Motorcycle Cleaning Procedures and Precautions

Recommended methods for cleaning various parts of the motorcycle.

Preparing for Long-Term Motorcycle Storage

Essential steps to protect the motorcycle during extended periods of non-use.

Motorcycle Technical Specifications

Consumer Information

Vehicle Identification and Model Information

Locating and recording vehicle identification and model label data.

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