ENG
CHAPTER 5
ENGINE
ENGINE REMOVAL .........................................................................................
5-1
MUFFLER AND EXHAUST CHAMBER ASSEMBLY .................................. 5-1
ENGINE .......................................................................................................5-2
REMOVING THE ENGINE .......................................................................... 5-3
INSTALLING THE ENGINE ......................................................................... 5-5
CYLINDER HEAD, CYLINDER AND PISTON .................................................
5-8
CYLINDER HEAD AND CYLINDER ............................................................ 5-8
PISTON ....................................................................................................... 5-9
REMOVING THE CYLINDER HEAD .......................................................... 5-10
REMOVING THE CYLINDER ..................................................................... 5-10
REMOVING THE PISTON .......................................................................... 5-10
CHECKING THE CYLINDER HEAD ........................................................... 5-11
CHECKING THE CYLINDER AND PISTON ............................................... 5-12
CHECKING THE PISTON RINGS .............................................................. 5-13
CHECKING THE PISTON PIN AND SMALL END BEARINGS ................... 5-14
INSTALLING THE PISTON RING AND PISTON ........................................ 5-15
INSTALLING THE CYLINDER AND CYLINDER HEAD .............................. 5-16
REED VALVE ...................................................................................................
5-18
REMOVING THE REED VALVE ................................................................. 5-19
CHECKING THE REED VALVE .................................................................. 5-19
ASSEMBLING AND INSTALLING THE REED VALVE ................................ 5-20
CLUTCH ...........................................................................................................
5-21
REMOVING THE CLUTCH ......................................................................... 5-23
CHECKING THE PRIMARY DRIVE GEAR ................................................. 5-24
CHECKING THE PRIMARY DRIVEN GEAR .............................................. 5-24
CHECKING THE CLUTCH HOUSING ........................................................ 5-24
CHECKING THE CLUTCH SHOES ............................................................ 5-24
INSTALLING THE CLUTCH ........................................................................ 5-25
AUTOLUBE PUMP ...........................................................................................
5-27
REMOVING THE AUTOLUBE PUMP ......................................................... 5-28
DISASSEMBLING THE AUTOLUBE PUMP ............................................... 5-29
CHECKING THE AUTOLUBE PUMP .......................................................... 5-29
ASSEMBLING THE AUTOLUBE PUMP ..................................................... 5-30
INSTALLING THE AUTOLUBE PUMP ........................................................ 5-30
KICK STARTER ...............................................................................................
5-31
REMOVING THE KICK STARTER .............................................................. 5-32
CHECKING THE KICK STARTER .............................................................. 5-32
INSTALLING THE KICK STARTER ............................................................. 5-33
CDI MAGNETO ................................................................................................
5-34
REMOVING THE CDI MAGNETO .............................................................. 5-35
CHECKING THE CDI MAGNETO ............................................................... 5-36
INSTALLING THE CDI MAGNETO ............................................................. 5-36
CRANKCASE AND CRANKSHAFT ................................................................
5-38
REMOVING THE CRANKCASE ................................................................. 5-40
CHECKING THE CRANKCASE .................................................................. 5-40
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06.5.16, 17:43:33
Summary of Contents for PW50W 2007
Page 1: ...SERVICE MANUAL 5PG 28197 10 LIT 11616 20 15 PW50W...
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Page 166: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN PRINTED IN U S A...