Yamaha RS90GTZ Service Manual page 8

CHAPTER 1.
GENERAL INFORMATION
SNOWMOBILE IDENTIFICATION .............1-1
FRAME SERIAL NUMBER ....................1-1
ENGINE SERIAL NUMBER ...................1-1
IMPORTANT INFORMATION ....................1-2
PREPARATION FOR REMOVAL AND
DISASSEMBLY......................................1-2
REPLACEMENT PARTS .......................1-2
GASKETS, OIL SEALS, AND
O-RINGS................................................1-3
LOCK WASHERS/PLATES AND
COTTER PINS .......................................1-3
BEARINGS AND OIL SEALS ................1-3
CIRCLIPS ..............................................1-3
LOCTITE® .............................................1-3
CHECKING THE CONNECTIONS ........1-4
HANDLING THE ELECTRONIC
PARTS ...................................................1-5
SPECIAL TOOLS .......................................1-6
FOR TUNE UP.......................................1-6
FOR ENGINE SERVICE ........................1-6
FOR POWER TRAIN SERVICE ............1-9
FOR FUEL INJECTION SERVICE ......1-10
FOR ELECTRICAL SERVICE .............1-10
CHAPTER 2.
PERIODIC INSPECTION AND
ADJUSTMENT
INTRODUCTION.........................................2-1
PERIODIC MAINTENANCE CHART
FOR THE EMISSION CONTROL
SYSTEM .....................................................2-1
GENERAL MAINTENANCE AND
LUBRICATION CHART..............................2-1
ENGINE...................................................... 2-3
SPARK PLUGS ..................................... 2-3
FUEL LINE INSPECTION ..................... 2-4
COOLING SYSTEM .............................. 2-4
VALVE CLEARANCE
ADJUSTMENT .................................... 2-10
THROTTLE BODY
SYNCHRONIZATION.......................... 2-16
THROTTLE CABLE FREE PLAY
ADJUSTMENT .................................... 2-18
THROTTLE OVERRIDE SYSTEM
(T.O.R.S.) CHECK............................... 2-19
COMPRESSION PRESSURE
MEASUREMENT................................. 2-20
ENGINE OIL LEVEL INSPECTION..... 2-22
ENGINE OIL REPLACEMENT ............ 2-23
CRANKCASE BREATHER HOSE
INSPECTION....................................... 2-27
CYLINDER HEAD BREATHER
HOSE INSPECTION ........................... 2-27
OIL TANK BREATHER HOSE
INSPECTION....................................... 2-28
THROTTLE BODY JOINTS
INSPECTION....................................... 2-28
CHECKING THE AIR FILTER
ELEMENT............................................ 2-29
EXHAUST SYSTEM INSPECTION..... 2-30
POWER TRAIN ........................................ 2-31
SHEAVE OFFSET ADJUSTMENT...... 2-31
DRIVE V-BELT .................................... 2-33
ENGAGEMENT SPEED CHECK ........ 2-35
PARKING BRAKE PAD
INSPECTION....................................... 2-35
PARKING BRAKE ADJUSTMENT ...... 2-36
BRAKE FLUID LEVEL
INSPECTION....................................... 2-37
BRAKE PAD INSPECTION ................. 2-38
BRAKE HOSE INSPECTION .............. 2-38
AIR BLEEDING (HYDRAULIC
BRAKE SYSTEM) ............................... 2-39
DRIVE CHAIN ..................................... 2-40
TRACK TENSION ADJUSTMENT ...... 2-43
SLIDE RUNNER INSPECTION........... 2-45
EXTROVERT SPROCKET WHEELS
(RS90GTZ/RS90LTGTZ) .................... 2-45
MAXIMIZING DRIVE TRACK LIFE ..... 2-46