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Yamaha YZ450F(X) User Manual

Yamaha YZ450F(X)
188 pages
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2008
PRINTED IN JAPAN
2007.05-2.1×1 CR
(E,F,G)
2S2-28199-82
YZ450F(X)
OWNER’S SERVICE MANUAL
MANUEL D’ATELIER DU
PROPRIETAIRE
FAHRER- UND
WARTUNGSHANDBUCH
YZ450F(X)
PRINTED ON RECYCLED PAPER
YAMAHA MOTOR CO., LTD.
2500 SHINGAI IWATA SHIZUOKA JAPAN
2008

Table of Contents

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Yamaha YZ450F(X) Specifications

General IconGeneral
Displacement449cc
Final DriveChain
Rear SuspensionKYB® single shock; fully adjustable, 12.5-in travel
Bore x Stroke97.0mm x 60.8mm
Fuel SystemFuel Injection
Ignition SystemTCI
Transmission5-speed
Front SuspensionKYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2-in travel
Front BrakeHydraulic disc, 270mm
Rear BrakeHydraulic disc, 240mm
Tire Front80/100-21
Tire Rear120/80-19
Engine TypeLiquid-cooled, 4-stroke, DOHC, 4-valve

Summary

GENERAL INFORMATION

FOREWORD

Introduction, cautions, and safety information for operating the machine.

HOW TO USE THIS MANUAL

Guide on navigating the manual's structure, format, and finding pages.

SPECIAL TOOLS

Lists specialized tools required for proper maintenance and assembly.

SPECIFICATIONS

GENERAL SPECIFICATIONS

Detailed technical specifications for the motorcycle model.

MAINTENANCE SPECIFICATIONS

Specific measurements and limits for engine and chassis components.

TIGHTENING TORQUES

Torque specifications for various fasteners across electrical, engine, and chassis.

REGULAR INSPECTION AND ADJUSTMENTS

MAINTENANCE INTERVALS

Schedule for routine checks, lubrication, and part replacements.

PRE-OPERATION INSPECTION AND MAINTENANCE

Essential checks and maintenance procedures before operating the machine.

ENGINE

CHECKING THE COOLANT LEVEL

Procedure to check and maintain the engine's coolant level.

CHECKING THE ENGINE OIL LEVEL

Procedure to check and maintain the engine's oil level.

ADJUSTING THE VALVE CLEARANCE

Instructions for measuring and adjusting valve clearances.

CHASSIS

BLEEDING THE HYDRAULIC BRAKE SYSTEM

Steps to remove air from the hydraulic brake system for proper function.

CHECKING AND REPLACING THE FRONT BRAKE PADS

Procedure for inspecting and replacing front brake pads.

CHECKING THE DRIVE CHAIN

Steps to measure drive chain length and check for wear.

CHECKING THE FRONT FORK

Inspection of front fork action, seals, and internal components.

ELECTRICAL

ELECTRICAL COMPONENTS AND WIRING DIAGRAM

Identification of electrical components and the system's wiring diagram.

IGNITION SYSTEM

Inspection steps for checking the ignition system and spark plug.

THROTTLE POSITION SENSOR SYSTEM

Inspection steps for the throttle position sensor and related components.

TUNING

ENGINE

General guidelines for engine tuning and carburetor adjustments.

CARBURETOR SETTING

Information on adjusting carburetor settings for optimal performance.

EXAMPLES OF CARBURETOR SETTING DEPENDING ON SYMPTOM

Troubleshooting guide for carburetor adjustments based on engine symptoms.

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