3
PERIODIC CHECKS AND ADJUSTMENTS
PERIODIC MAINTENANCE ............................................................................3-1
INTRODUCTION.......................................................................................3-1
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL
SYSTEM (YP125R) ..................................................................................3-1
GENERAL MAINTENANCE AND LUBRICATION CHART (YP125R) ......3-1
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL
SYSTEM (YP250R) ..................................................................................3-3
GENERAL MAINTENANCE AND LUBRICATION CHART (YP250R) ......3-3
ENGINE (YP125R)...........................................................................................3-6
ADJUSTING THE VALVE CLEARANCE ..................................................3-6
ADJUSTING THE EXHAUST GAS VOLUME ...........................................3-8
ADJUSTING THE THROTTLE CABLE FREE PLAY ................................3-9
CHECKING THE SPARK PLUG ...............................................................3-9
CHECKING THE IGNITION TIMING.......................................................3-10
MEASURING THE COMPRESSION PRESSURE..................................3-11
CHECKING THE ENGINE OIL LEVEL....................................................3-12
CHANGING THE ENGINE OIL ...............................................................3-12
CHANGING THE FINAL TRANSMISSION OIL.......................................3-14
REPLACING THE AIR FILTER ELEMENT .............................................3-15
CLEANING THE V-BELT CASE AIR FILTER ELEMENT .......................3-15
CHECKING THE THROTTLE BODY JOINT...........................................3-16
CHECKING THE FUEL HOSE................................................................3-16
CHECKING THE BREATHER HOSES ...................................................3-16
CHECKING THE EXHAUST SYSTEM....................................................3-17
CHECKING THE COOLANT LEVEL.......................................................3-17
CHECKING THE COOLING SYSTEM ....................................................3-18
CHANGING THE COOLANT...................................................................3-18
ENGINE (YP250R).........................................................................................3-21
ADJUSTING THE VALVE CLEARANCE ................................................3-21
ADJUSTING THE EXHAUST GAS VOLUME .........................................3-23
ADJUSTING THE THROTTLE CABLE FREE PLAY ..............................3-23
CHECKING THE SPARK PLUG .............................................................3-24
CHECKING THE IGNITION TIMING.......................................................3-25
MEASURING THE COMPRESSION PRESSURE..................................3-25
CHECKING THE ENGINE OIL LEVEL....................................................3-26
CHANGING THE ENGINE OIL ...............................................................3-27
CHANGING THE FINAL TRANSMISSION OIL.......................................3-28
REPLACING THE AIR FILTER ELEMENT .............................................3-29
CLEANING THE V-BELT CASE AIR FILTER ELEMENT .......................3-30
CHECKING THE THROTTLE BODY JOINT...........................................3-30
CHECKING THE FUEL HOSE................................................................3-30
CHECKING THE BREATHER HOSES ...................................................3-30
CHECKING THE EXHAUST SYSTEM....................................................3-31
CHECKING THE COOLANT LEVEL.......................................................3-31
CHECKING THE COOLING SYSTEM ....................................................3-32
CHANGING THE COOLANT...................................................................3-32
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