Yamaha YZ450F Owner's Service Manual

MANUEL D’ATELIER DU PROPRIETAIRE FAHRER- UND WARTUNGSHANDBUCH YZ450F(Z) 33D-28199-80 2010 q Read this manual carefully before operating this vehicle. q Il convient de lire attentivement ce manuel avant la première utilisation du véhicule. q Bitte lesen Sie diese Bedienungsanleitung sorgfältig durch, bevor Sie das Fahrzeug in Betrieb nehmen. ...

Q Il 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. Q Bitte lesen Sie diese Bedienungsanleitung sorgfältig durch, bevor Sie das Fahrzeug in Betrieb nehmen. Diese Bedienungsanleitung muss, wenn das Fahrzeug verkauft wird, beim Fahrzeug verbleiben. ...

OWNER’S SERVICE MANUAL Read this manual carefully before operating this vehicle. Read this manual carefully before operating this vehicle. ...

©2009 by Yamaha Motor Co., Ltd. 1st Edition, August 2009 All rights reserved. Any reprinting or unauthorized use without the written permission of Yamaha Motor Co., Ltd. is expressly prohibited. Printed in Japan ...

a Yamaha YZ series. This model is the culmination of Yamaha's vast ex- perience in the production of paceset- ting racing machines. It represents the highest grade of craftsmanship and reliability that have made Yama- ha a leader. This manual explains operation, in- spection, basic maintenance and tun- ing of your machine. If you have any questions about this manual or your machine, please contact your Yama- ha dealer. Yamaha continually seeks advance- ments in product design and quality. Therefore, while this manual contains the most current product information available at the time of printing ...

Weights of machines without fuel The minimum weights for motocross machines are: for the class 125 cc: minimum 88 kg (194 lb) for the class 250 cc: minimum 98 kg (216 lb) for the class 500 cc: minimum 102 kg (225 lb) In modifying your machine (e.g., for weight reduction), take note of the above limits of weight. HOW TO USE THIS MANUAL FINDING THE REQUIRED PAGE 1. This manual consists of eight chapters; "General Information", "Specifications", "Regular inspec- tion and adjustments", "Engine", "Chassis", "Fuel system", "Electri- cal" and "Tuning". 2. The table of contents is at the be- ginning of the manual. Look over the general l ...

To help identify parts and clarify pro- cedure steps, there are exploded dia- grams at the start of each removal and disassembly section. 1. An easy-to-see exploded diagram "1" is provided for removal and disassembly jobs. 2. Numbers "2" are given in the or- der of the jobs in the exploded di- agram. A number that is enclosed by a circle indicates a disassem- bly step. 3. An explanation of jobs and notes is presented in an easy-to-read way by the use of symbol marks "3". The meanings of the symbol marks are given on the next page. 4. A job instruction chart "4" accom- panies the exploded diagram, providing the order of jobs, na ...

GENERAL INFORMATION 1 SPECIFICATIONS 2 REGULAR INSPECTION AND ADJUSTMENTS 3 ENGINE 4 CHASSIS 5 FUEL SYSTEM 6 ELECTRICAL 7 TUNING 8 ...

DESCRIPTION ................. 1-5 CONSUMER INFORMATION................. 1-6 FEATURES....................... 1-7 INCLUDED PARTS .......... 1-9 IMPORTANT INFORMATION................. 1-9 HANDLING THE ELECTRONIC PARTS ... 1-10 CHECKING OF CONNECTION................ 1-10 SPECIAL TOOLS........... 1-12 CONTROL FUNCTIONS................... 1-17 STARTING AND BREAK-IN.............. 1-17 TORQUE-CHECK POINTS........................... 1-19 CLEANING AND STORAGE ............. 1-20 CHAPTER 2 SPECIFICATIONS GENERAL SPECIFICATIONS............ 2-1 MAINTENANCE SPECIFICATIONS............ 2-3 TI ...

GENERAL INFORMATION LOCATION OF IMPORTANT LABELS Please read the following important labels carefully before operating this vehicle. CANADA 1 ...

Familiarize yourself with the following pictograms and read the explanatory text. Read Owner's service manual. This unit contains high-pressure nitrogen gas. Mishandling can cause explosion. Do not incinerate, puncture or open. Turn off the main switch after riding to avoid draining the battery. Use unleaded gasoline only. Measure tire pressure when tires are cold. Adjust tire pressure. Improper tire pressure can cause loss of control. Loss of control can result in severe injury or death. ...

• Designs and specifications are subject to change without notice. 1. Clutch lever 2. Front brake lever 3. Throttle grip 4. Radiator cap 5. Fuel tank cap 6. Engine stop switch 7. Kickstarter crank 8. Fuel tank 9. Radiator 10. Coolant drain bolt 11. Rear brake pedal 12. Valve joint 13. Air cleaner 14. Drive chain 15. Shift pedal 16. Oil level check window 17. Starter knob/idle screw 18. Front fork ...

knowing the serial number of your machine: 1. When ordering parts, you can give the number to your Yamaha dealer for positive identification of the model you own. 2. If your machine is stolen, the au- thorities will need the number to search for and identify your ma- chine. VEHICLE IDENTIFICATION NUMBER The vehicle identification number "1" is stamped on the right of the steering head pipe. ENGINE SERIAL NUMBER The engine serial number "1" is stamped into the elevated part of the right-side of the engine. MODEL LABEL The model label "1" is affixed to the frame under the ...

The main function of a fuel supply system is to provide fuel to the combustion chamber at the optimum air-fuel ratio in ac- cordance with the engine operating conditions and the atmospheric temperature. In the conventional carburetor system, the air-fuel ratio of the mixture that is supplied to the combustionchamber is created by the volume of the intake air and the fuel that is metered by the jet used in the respective carburetor. Despite the same volume of intake air, the fuel volume requirement varies by the engine operating conditions,such as ac- celeration, deceleration, or operating under a heavy loa ...

applied to the fuel injector at only 324 kPa (3.24 kgf/cm ² , 47.0 psi). Accordingly,when the energizing signal from the ECU energizes the fuel injector, the fuel passage opens, causingthe fuel to be injected into the intake manifold only during the time the passage remains open. Therefore, the longer the length of time the fuel injector is energized (injection duration), the greater the volume of fuel that is supplied. Conversely, the shorter the length of time the fuel injector is energized (in- jecti ...

only the machine when standing or transporting it. • Never apply additional force to the sidestand. • Remove this sidestand before starting out. VALVE JOINT This valve joint "1" prevents fuel from flowing out and is installed to the fuel tank breather hose. In this installation, make sure the arrow faces the fuel tank and also downward. SPARK PLUG WRENCH This spark plug wrench "1" is used to remove and install the spark plug. NIPPLE WRENCH This nipple wrench "1" is used to tighten the spoke. HANDLEBAR PROTECTOR Install the handlebar protector "1" so that th ...

4. During the machine disassembly, clean all parts and place them in trays in the order of disassembly. This will speed up assembly time and help assure that all parts are correctly reinstalled. 5. Keep away from fire. ALL REPLACEMENT PARTS 1. We recommend to use Yamaha genuine parts for all replace- ments. Use oil and/or grease rec- ommended by Yamaha for assembly and adjustment. GASKETS, OIL SEALS AND O- RINGS 1. All gaskets, oil seals, and O-rings should be replaced when an en- gine is overhauled. All gasket sur- faces, oil seal lips, and O-rings must be cleaned. 2. Properly oil all mating parts and bearings during ...