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EC020000

INTRODUCTION

Congratulations on your purchase of a
Yamaha YZ series. This model is the culmina-
tion of Yamaha’s vast experience in the pro-
duction 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.

NOTE:

As improvements are made on this model,
some data in this manual may become out-
dated. If you have any questions, please con-
sult your Yamaha dealer.

WARNING

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
INSPECTIONS AND CAREFUL MAINTE-
NANCE, ALONG WITH GOOD RIDING
SKILLS, WILL ENSURE THAT YOU SAFETY
ENJOY THE CAPABILITIES AND THE RELI-
ABILITY OF THIS MACHINE.

Summary of Contents for YZ 2003 Series

Page 1: ...LIT 11626 16 39 YZ250FR 5UL 28199 10 OWNER S SERVICE MANUAL ...

Page 2: ...please contact your Yamaha dealer NOTE As improvements are made on this model some data in this manual may become out dated If you have any questions please con sult your Yamaha dealer WARNING 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 A...

Page 3: ......

Page 4: ... PROTECTIVE APPAREL When operating this machine always wear an approved helmet with gog gles or a face shield Also wear heavy boots gloves and protective cloth ing Always wear proper fitting cloth ing that will not be caught in any of the moving parts or controls of the machine 4 ALWAYS MAINTAIN YOUR MACHINE IN PROPER WORKING ORDER For safety and reliability the machine must be properly maintained...

Page 5: ...s Carbon monoxide is a dangerous gas which can cause unconscious ness or can be lethal 8 PARK THE MACHINE CAREFULLY TURN OFF THE ENGINE Always turn off the engine if you are going to leave the machine Do not park the machine on a slope or soft ground as it may fall over 9 THE ENGINE EXHAUST PIPE MUF FLER AND OIL TANK WILL BE VERY HOT AFTER THE ENGINE HAS BEEN RUN Be careful not to touch them or to...

Page 6: ...his machine and should remain with it even if the machine is subsequently sold EC060000 NOTICE Some data in this manual may become out dated due to improvements made to this model in the future If there is any question you have regarding this manual or your machine please consult your Yamaha dealer EC070001 F I M MACHINE WEIGHTS Weights of machines without fuel The minimum weights for motocross ma...

Page 7: ... avoid damage to the machine NOTE A NOTE provides key information to make pro cedures easier or clearer WARNING CAUTION EC082000 FINDING THE REQUIRED PAGE 1 This manual consists of seven chapters General information Specifications Regular inspection and adjustments Engine Chassis Electrical and Tuning 2 The table of contents is at the beginning of the manual Look over the general lay out of the bo...

Page 8: ... 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 order of the jobs in the exploded diagram A number that is enclosed by a circle indicates a disassembly 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 a...

Page 9: ... Lubricant B Tightening C Specified value Service limit D Resistance Ω Voltage V Electric current A Illustrated symbols E to H in the exploded diagrams indicate grade of lubricant and loca tion of lubrication point E Apply engine oil F Apply molybdenum disulfide oil G Apply lightweight lithium soap base grease H Apply molybdenum disulfide grease Illustrated symbols I to J in the exploded diagrams ...

Page 10: ...Thank you very much for your reading Please click here and go back to our website Then you can download the complete manual instantly No waiting ...

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