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Yamaha WR400F User Manual

Yamaha WR400F
16 pages
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YAMAHA WR400F Owner's Service Manual Chapter 1 General Information Page 1 of 16
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Yamaha WR400F Specifications

General IconGeneral
Displacement400cc
IgnitionCDI
Transmission5-speed
Final DriveChain
Front BrakeSingle disc
Rear BrakeSingle disc
Front Tire80/100-21
Rear Tire110/100-18
Seat Height965 mm
Width825 mm
Fuel SystemKeihin FCR39 carburetor
Front SuspensionTelescopic fork
Engine Type4-stroke, liquid-cooled, DOHC, 5-valve single

Summary

General Information

Description of Components

Lists and identifies key components and controls of the motorcycle for reference.

Machine Identification

Vehicle Identification Number (VIN)

Location and purpose of the VIN stamped on the steering head pipe for identification.

Engine Serial Number

Location of the engine serial number on the engine for identification and parts ordering.

Model Label Location

Details the location of the model label affixed to the frame for spare parts identification.

Special Tools

Control Functions Overview

Engine Stop Button Operation

Explains the location and function of the engine stop button on the left handlebar.

Clutch Lever Function

Describes the operation of the clutch lever for engaging and disengaging the clutch.

Shift Pedal Usage

Details how to use the shift pedal to change gears in the transmission.

Kick Starter Procedure

Instructions for using the kick starter to start the engine.

Decompression Lever Use

How to use the decompression lever for easier starting, with a critical caution.

Throttle Grip Operation

Explains how to operate the throttle grip for acceleration and deceleration.

Front Brake Lever Activation

Location and operation of the front brake lever to engage the front brake.

Rear Brake Pedal Activation

Location and operation of the rear brake pedal to engage the rear brake.

Fuel Cock Positions

Explains the three positions (OFF, ON, RES) of the fuel cock and their functions.

Cold Starter Knob Function

Details the function of the cold starter knob for starting a cold engine.

Hot Starter Knob Use

Explains the use of the hot starter knob for starting a warm engine.

Valve Joint Purpose

Function of the valve joint in the fuel tank breather hose and installation caution.

Lights Switch Location

Identifies the location of the lights switch on the handlebar.

Accessory Flap Function

Purpose of the flap to prevent water entry into the carburetor and other uses.

Recommended Fuel

Guidance on recommended fuel types and octane ratings, including region-specific notes.

Starting and Break-In Procedures

Starting a Cold Engine

Step-by-step procedure for starting a cold engine, including necessary pre-checks.

Starting a Warm Engine

Procedure for starting a warm engine, emphasizing the use of the hot starter knob.

Restarting After a Fall

Steps to restart the engine after it has stopped or the motorcycle has fallen.

Initial Break-In Procedures

Guidelines for the initial operation period to ensure optimal performance and avoid damage.

Torque-Check Points

Cleaning and Storage

Machine Cleaning Instructions

Detailed steps for washing and cleaning the motorcycle to maintain its condition.

Storage Preparation

Preventive measures for storing the machine for extended periods to avoid deterioration.

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