2009-2013 Yamaha YFZ450RY ATV OEM Service & Repair Manual

SERVICE MANUAL YFZ450RY 18P-28197-10 LIT-11616-22-75 2009

EAS20050 YFZ450RY SERVICE MANUAL ©2008 by Yamaha Motor Corporation, U.S.A. First edition, October 2008 All rights reserved. Any reproduction or unauthorized use without the written permission of Yamaha Motor Corporation, U.S.A. is expressly prohibited. Printed in U.S.A. P/N LIT-11616-22-75

EAS20071 IMPORTANT This manual was produced by the Yamaha Motor Company, Ltd. primarily for use by Yamaha deal- ers and their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one manual. Therefore, anyone who uses this book to perform maintenance and repairs on Yamaha vehicles should have a basic understanding of mechanics and the techniques to repair these types of vehicles. Repair and maintenance work attempted by anyone without this knowledge is likely to render the vehicle unsafe and unfit for use. This model has been designed and manufactured to perform within certain specifications in regard to performance and emissions. Proper service with the correct tools is necessary to ensure that the vehicle will operate as designed. If there is any question about a service procedure, it is imperative that you contact a Yamaha dealer for any service information changes that apply to this model. This policy is intended to provide the customer with the most satisfaction from his vehicle and to conform to federal environmental quality objectives. Yamaha Motor Company, Ltd. is continually striving to improve all of its models. Modifications and significant changes in specifications or procedures will be forwarded to all authorized Yamaha deal- ers and will appear in future editions of this manual where applicable. TIP • This Service Manual contains information regarding periodic maintenance to the emission control system. Please read this material carefully. • Designs and specifications are subject to change without notice. EAS20081 IMPORTANT MANUAL INFORMATION Particularly important information is distinguished in this manual by the following notations. This is the safety alert symbol. It is used to alert you to potential per- sonal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. A WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury. A NOTICE indicates special precautions that must be taken to avoid damage to the vehicle or other property. A TIP provides key information to make procedures easier or clearer. WARNING NOTICE TIP

EAS20090 HOW TO USE THIS MANUAL This manual is intended as a handy, easy-to-read reference book for the mechanic. Comprehensive explanations of all installation, removal, disassembly, assembly, repair and check procedures are laid out with the individual steps in sequential order. • The manual is divided into chapters and each chapter is divided into sections. The current section title is shown at the top of each page “1”. • Sub-section titles appear in smaller print than the section title “2”. • To help identify parts and clarify procedure steps, there are exploded diagrams at the start of each removal and disassembly section “3”. • Numbers are given in the order of the jobs in the exploded diagram. A number indicates a disassembly step “4”. • Symbols indicate parts to be lubricated or replaced “5”. Refer to “SYMBOLS”. • A job instruction chart accompanies the exploded diagram, providing the order of jobs, names of parts, notes in jobs, etc “6”. • Jobs requiring more information (such as special tools and technical data) are described sequen- tially “7”.

EAS20100 SYMBOLS The following symbols are used in this manual for easier understanding. TIP The following symbols are not relevant to every vehicle. SYMBOL DEFINITION SYMBOL DEFINITION Serviceable with engine mounted Gear oil Filling fluid Molybdenum disulfide oil Lubricant Brake fluid Special tool Wheel bearing grease Tightening torque Lithium-soap-based grease Wear limit, clearance Molybdenum disulfide grease Engine speed Silicone grease Electrical data Apply locking agent (LOC- TITE®). Engine oil Replace the part with a new one.

1 2 3 4 5 6 7 8 9 EAS20110 TABLE OF CONTENTS GENERAL INFORMATION SPECIFICATIONS PERIODIC CHECKS AND ADJUSTMENTS CHASSIS ENGINE COOLING SYSTEM FUEL SYSTEM ELECTRICAL SYSTEM TROUBLESHOOTING

1 GENERAL INFORMATION IDENTIFICATION .......................................................................................... 1-1 VEHICLE IDENTIFICATION NUMBER ................................................... 1-1 MODEL LABEL ....................................................................................... 1-1 FEATURES ................................................................................................... 1-2 OUTLINE OF THE FI SYSTEM .............................................................. 1-2 FI SYSTEM ............................................................................................. 1-3 IMPORTANT INFORMATION ....................................................................... 1-4 PREPARATION FOR REMOVAL AND DISASSEMBLY .......................... 1-4 REPLACEMENT PARTS......................................................................... 1-4 GASKETS, OIL SEALS AND O-RINGS.................................................. 1-4 LOCK WASHERS/PLATES AND COTTER PINS ................................... 1-4 BEARINGS AND OIL SEALS ................................................................. 1-5 CIRCLIPS ............................................................................................... 1-5 CHECKING THE CONNECTIONS ............................................................... 1-6 SPECIAL TOOLS.......................................................................................... 1-7

IDENTIFICATION 1-1 EAS20130 IDENTIFICATION EAS20140 VEHICLE IDENTIFICATION NUMBER The vehicle identification number “1” is stamped into the left side of the frame. EAS20150 MODEL LABEL The model label “1” is affixed to the air filter case cover. This information will be needed to order spare parts.

2009-2013 Yamaha YFZ450RY ATV OEM Service & Repair Manual

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