Yamaha MX250 - Table of Contents

TABLE OF CONTENTS
GENERAL INFORMATION
MACHINE IDENTIFICATION ......................1-1
SERIAL NUMBER .................................1-1
STARTING SERIAL NUMBER...............1-1
DIMENSIONS .............................................1-2
DIMENSION CHART .............................1-2
TOP .......................................................1-3
MOUNTING BASE ................................1-3
LEFT SIDE ............................................1-4
FRONT ..................................................1-5
IMPORTANT INFORMATION .....................1-6
PREPARATION FOR REMOVAL AND
DISASSEMBLY......................................1-6
CAUTION ON SERVICE........................1-6
NOTES ON SERVICE ...........................1-6
ALL REPLACEMENT PARTS................1-7
GASKETS, OIL SEALS, AND
O-RINGS ...............................................1-7
BEARINGS AND OIL SEALS ................1-8
BASIC SERVICE INFORMATION ..............1-8
ELECTRICAL SYSTEM......................... 1-8
SPECIAL TOOLS AND TESTERS ...........1-12
PERIODIC CHECKS AND
ADJUSTMENTS
INTRODUCTION.........................................2-1
MAINTENANCE INTERVALS CHART .......2-1
PERIODIC MAINTENANCE/
LUBRICATION INTERVALS.......................2-1
PERIODIC MAINTENANCE .......................2-3
SPARK PLUG ........................................2-3
FUEL LEAKAGE....................................2-4
ENGINE OIL LEAKAGE ........................2-4
ENGINE OIL LEVEL..............................2-4
REPLACING THE ENGINE OIL ............2-5
AIR FILTER ELEMENT..........................2-6
MUFFLER..............................................2-7
FUEL TANK FILTER ..............................2-9
FUEL COCK STRAINER.....................2-10
BREATHER HOSE ..............................2-11
CYLINDER HEAD
DECARBONIZATION .......................... 2-11
ADJUSTING THE VALVE
CLEARANCE ...................................... 2-11
ENGINE SPEED ................................. 2-13
ADJUSTING THE ENGINE SPEED.... 2-14
RECOIL STARTER ............................. 2-15
FITTINGS AND FASTENERS............. 2-16
ENGINE
ENGINE INSPECTION............................... 3-1
MEASURING THE COMPRESSION
PRESSURE .......................................... 3-1
AIR FILTER ................................................ 3-3
FUEL TANK................................................ 3-4
CHECKING THE FUEL TANK CAP
(CANISTER).......................................... 3-5
MUFFLER .................................................. 3-6
INSTALLING THE MUFFLER ............... 3-7
RECOIL STARTER .................................... 3-8
DISASSEMBLING THE RECOIL
STARTER.............................................. 3-9
CHECKING THE RECOIL STARTER ... 3-9
ASSEMBLING THE RECOIL
STARTER............................................ 3-10
FLYWHEEL .............................................. 3-12
REMOVING THE FLYWHEEL............. 3-13
INSTALLING THE FLYWHEEL ........... 3-14
INSTALLING THE TCI UNIT ............... 3-14
GOVERNOR ............................................. 3-16
THROTTLE LEVER ASSEMBLY......... 3-16
FLYWEIGHT SHAFT ASSEMBLY ....... 3-17
REMOVING THE FLYWEIGHT
SHAFT ASSEMBLY AND
GOVERNOR FORK ............................ 3-18
DISASSEMBLING THE FLYWEIGHT
SHAFT ASSEMBLY ............................ 3-18
CHECKING THE FLYWEIGHT
SHAFT ASSEMBLY ............................ 3-18
ASSEMBLING THE FLYWEIGHT
SHAFT ASSEMBLY ............................ 3-19