Yamaha YZ450FX 2023 User manual

BEX-28199-72
OWNER’S MANUAL
MANUEL DU PROPRIÉTAIRE
Read this manual carefully before operating this vehicle.
Il convient de lire attentivement ce manuel avant la première utilisation du véhicule.
YZ450FXP
PRINTED IN JAPAN
2022.06-0.1×1 !
(E, F)
YZ450FX
2023
YZ450FXP 2023
BEX-28199-72_cover_9mm.indd 1-3 2022/05/23 10:25:39

QRead this manual carefully before operating this vehicle. This manual should stay with this vehicle
if it is sold.
QIl convient de lire attentivement ce manuel avant la première utilisation du véhicule. Le
manuel doit être remis avec le véhicule en cas de vente de ce dernier.
BEX-28199-72_cover_9mm.indd 4-6 2022/05/23 10:25:39

Read this manual carefully before operating this vehicle.
2023
OWNER’S MANUAL
YZ450FX
YZ450FXP
BEX-28199-72-E0

EAM20161Read this manual carefully
Read this manual carefully before operating this vehicle. This manual should stay with this vehicle
if it is sold.
CAN
This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two con-
ditions:
(1) This device may not cause interference; and (2) This device must accept any interference, including interfer-
ence that may cause undesired operation of the device.
The available scientific evidence does not show that any health problems are associated with using low power
wireless devices. There is no proof, however, that these low power wireless devices are absolutely safe. Low
power Wireless devices emit low levels of radio frequency energy (RF) in the microwave range while being used.
Whereas high levels of RF can produce health effects (by heating tissue), exposure of low-level RF that does not
produce heating effects causes no known adverse health effects. Many studies of low-level RF exposures have
not found any biological effects.
Some studies have suggested that some biological effects might occur, but such findings have not been con-
firmed by additional research. COMMUN.CONT.UNIT ASSY. (T722-A00) has been tested and found to comply
with IC radiation exposure limits set forth for an uncontrolled environment and meets RSS-102 of the IC radio
frequency (RF) Exposure rules.
Reporting safety defects (For Canada)
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should
immediately inform Transport Canada in addition to notifying Yamaha Motor Canada Ltd, Canada. If Transport
Canada receives similar complaints, it may open an investigation, and if it finds that a safety defect exists in a
group of vehicles, it may order a recall and remedy campaign. However, Transport Canada cannot become in-
volved in individual problems between you, your dealer, or Yamaha Motor Canada Ltd., Canada.
To contact Transport Canada, you may call Defect Investigations and Recall Division at 819-994-3328 or toll free
1-800-333-0510, go to www.tc.gc.ca or email: [email protected] or write to Transport Canada, 330 Sparks Street
Ottawa, ON, K1A 0N5.
You can also obtain other information about motor vehicle safety from www.tc.gc.ca.

EAM20080
YZ450FXP
OWNER’S MANUAL
©2023 by Yamaha Motor Co., Ltd.
First edition, April 2022
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan.

EAM20180
IMPORTANT
Congratulations on your purchase of a Yamaha YZ series. This model is the culmination of Yamaha’s
vast experience in the production of pacesetting racing machines. It represents the highest grade of
craftsmanship and reliability that have made Yamaha a leader.
This manual explains operation, inspection, basic maintenance and tuning of your machine. If you have
any questions about this manual or your machine, please contact your Yamaha dealer.
TIP
•Yamaha continually seeks advancements in product design and quality. Therefore, while this manual
contains the most current product information available at the time of printing, there may be minor dis-
crepancies between your machine and this manual. If you have any questions concerning this man-
ual, please consult your Yamaha dealer.
•This manual is intended for those who have basic knowledge and skill concerning the servicing of
Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl-
edge and skill concerning servicing are requested not to undertake inspection, adjustment, disassem-
bly, or reassembly only by reference to this manual. It may lead to servicing trouble and mechanical
damage.
WARNING
EWA20270
PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS
MACHINE. DO NOT ATTEMPT TO OPERATE THIS MACHINE UNTIL YOU HAVE ATTAINED A
SATISFACTORY KNOWLEDGE OF ITS CONTROLS AND OPERATING FEATURES AND UNTIL
YOU HAVE BEEN TRAINED IN SAFE AND PROPER RIDING TECHNIQUES. REGULAR INSPEC-
TIONS AND CAREFUL MAINTENANCE, ALONG WITH GOOD RIDING SKILLS, WILL ENSURE
THAT YOU SAFETY ENJOY THE CAPABILITIES AND THE RELIABILITY OF THIS MACHINE.
EAM30001
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

GENERAL INFORMATION 1
SPECIFICATIONS 2
PERIODIC CHECKS AND
ADJUSTMENTS 3
CHASSIS 4
ENGINE 5
FUEL SYSTEM 6
ELECTRICAL SYSTEM 7
TROUBLESHOOTING 8
TUNING 9
EAM10003
TABLE OF CONTENTS

1
2
3
4
5
6
7
8
9
10
GENERAL INFORMATION
SAFETY INFORMATION..................................................................................1-1
FOR SAFETY, BE SURE TO OBEY THE FOLLOWING: ..........................1-1
LOCATION OF IMPORTANT LABELS ............................................................1-4
DESCRIPTION..................................................................................................1-7
IDENTIFICATION..............................................................................................1-8
VEHICLE IDENTIFICATION NUMBER ......................................................1-8
ENGINE SERIAL NUMBER .......................................................................1-8
INCLUDED PARTS...........................................................................................1-9
NIPPLE WRENCH......................................................................................1-9
HANDLEBAR PROTECTOR ......................................................................1-9
FUEL HOSE JOINT COVER ......................................................................1-9
POWER TUNER.........................................................................................1-9
IMPORTANT INFORMATION .........................................................................1-11
PREPARATION FOR REMOVAL AND DISASSEMBLY..........................1-11
REPLACEMENT PARTS..........................................................................1-11
INSTRUMENT AND CONTROL FUNCTIONS ...............................................1-12
WARNING LIGHTS ..................................................................................1-12
ENGINE STOP SWITCH..........................................................................1-12
START SWITCH.......................................................................................1-12
MODE SWITCH........................................................................................1-12
SHIFT PEDAL ..........................................................................................1-13
FRONT BRAKE LEVER ...........................................................................1-13
REAR BRAKE PEDAL..............................................................................1-13
SIDESTAND .............................................................................................1-13
STARTER KNOB......................................................................................1-13
FUEL TANK CAP .....................................................................................1-14
STARTING AND BREAK-IN...........................................................................1-15
FUEL ........................................................................................................1-15
STARTING A COLD ENGINE ..................................................................1-15
STARTING A WARM ENGINE.................................................................1-16
BREAK-IN PROCEDURES ......................................................................1-16
ENGINE STARTING PRECAUTION ........................................................1-16
MAINTENANCE AFTER BREAK-IN ..............................................................1-17
MAJOR MAINTENANCE..........................................................................1-17
AIR FILTER MAINTENANCE ...................................................................1-17
TORQUE-CHECK POINTS.............................................................................1-18

MOTORCYCLE CARE AND STORAGE ........................................................1-20
CARE........................................................................................................1-20
STORAGE ................................................................................................1-21