Yamaha YZ250F(X), Owner'S Service Manual

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CONTENTS
CHAPTER 1
GENERAL INFOR-
MATION
DESCRIPTION ................. 1-1
MACHINE
IDENTIFICATION ............. 1-2
INCLUDED PARTS .......... 1-2
IMPORTANT
INFORMATION................. 1-2
CHECKING OF
CONNECTION.................. 1-3
SPECIAL TOOLS ............. 1-4
CONTROL FUNCTIONS .. 1-8
STARTING AND
BREAK-IN ........................ 1-8
TORQUE-CHECK
POINTS........................... 1-11
CLEANING AND
STORAGE ...................... 1-12
CHAPTER 2
SPECIFICATIONS
GENERAL
SPECIFICATIONS............ 2-1
MAINTENANCE
SPECIFICATIONS............ 2-3
TIGHTENING
TORQUES ...................... 2-10
LUBRICATION
DIAGRAMS .................... 2-16
CABLE ROUTING
DIAGRAM....................... 2-18
CHAPTER 3
REGULAR INSPEC-
TION AND AD-
JUSTMENTS
MAINTENANCE
INTERVALS......................3-1
PRE-OPERATION
INSPECTION AND
MAINTENANCE................3-5
ENGINE ............................ 3-6
CHASSIS ........................3-14
ELECTRICAL ................. 3-23
CHAPTER 4
ENGINE
SEAT, FUEL TANK AND
SIDE COVERS..................4-1
EXHAUST PIPE AND
SILENCER ........................4-3
RADIATOR .......................4-5
CARBURETOR................. 4-7
CAMSHAFTS..................4-14
CYLINDER HEAD...........4-19
VALVES AND VALVE
SPRINGS ........................4-21
CYLINDER AND
PISTON...........................4-25
CLUTCH .........................4-29
OIL FILTER ELEMENT
AND WATER PUMP.......4-34
BALANCER ....................4-38
OIL PUMP.......................4-40
KICK SHAFT AND
SHIFT SHAFT................. 4-44
CDI MAGNETO............... 4-49
ENGINE REMOVAL .......4-51
CRANKCASE AND
CRANKSHAFT ............... 4-55
TRANSMISSION, SHIFT
CAM AND SHIFT
FORK ..............................4-61
CHAPTER 5
CHASSIS
FRONT WHEEL AND
REAR WHEEL ..................5-1
FRONT BRAKE AND
REAR BRAKE ..................5-6
FRONT FORK.................5-16
HANDLEBAR..................5-24
STEERING ......................5-28
SWINGARM ....................5-32
REAR SHOCK
ABSORBER....................5-37
CHAPTER 6
ELECTRICAL
ELECTRICAL
COMPONENTS AND
WIRING DIAGRAM...........6-1
IGNITION SYSTEM...........6-2
THROTTLE POSITION
SENSOR SYSTEM ...........6-5
CHAPTER 7
TUNING
ENGINE.............................7-1
CHASSIS ..........................7-6