Yamaha CS50 Service Manual page 63

ENGINE REMOVAL ........................................................................4-1
COVER REMOVAL .....................................................................4-1
COOLING SYSTEM (CS50Z only)...................................................4-1
CABLES, LEADS AND HOSES ......................................................4-1
ENGINE REMOVAL .....................................................................4-2
ENGINE DISASSEMBLY..................................................................4-3
REMOVING THE REAR WHEEL ...................................................4-3
REMOVING THE CYLINDER HEAD AND CYLINDER ........................4-3
REMOVING THE PISTON PIN AND PISTON ....................................4-3
REMOVING THE KICKSTARTER SYSTEM .......................................4-4
REMOVING THE PRIMARY SHEAVE .............................................4-5
DISASSEMBLING THE SECONDARY SHEAVE .................................4-6
REMOVING THE STARTER SYSTEM .............................................4-7
TRANSMISSION ........................................................................4-7
DC-CDI MAGNETO .....................................................................4-8
AUTOLUBE OIL PUMP ...............................................................4-9
REMOVING THE CENTERSTAND...................................................4-9
DISASSEMBLING THE CRANKCASE AND CRANKSHAFT..................4-9
INSPECTION AND REPAIR ............................................................4-11
CHECKING THE CYLINDER HEAD .............................................4-11
CHECKING THE CYLINDER AND PISTON ....................................4-12
CHECKING THE PISTON RINGS ................................................4-14
CHECKING THE PISTON PIN AND PISTON PIN BEARING ...............4-15
CHECKING THE KICKSTARTER ...................................................4-16
TRANSMISSION........................................................................4-16
AUTOLUBE OIL PUMP...............................................................4-17
CHECKING THE CRANKSHAFT ...................................................4-17
CHECKING THE BEARINGS ......................................................4-18
CHECKING THE PRIMARY SHEAVE .............................................4-18
CHECKING THE SECONDARY SHEAVE .......................................4-19
CHECKING THE V-BELT ............................................................4-20
STARTER CLUTCH AND GEARS ................................................4-21
ENGINE ASSEMBLY AND ADJUSTMENT .......................................4-22
CRANKSHAFT AND CRANKCASE................................................4-22
INSTALLING THE CRANKSHAF ...................................................4-23
AUTOLUBE OIL PUMP AND DC-CDI MAGNETO ...........................4-24
INSTALLING THE AUTOLUBE OIL PUMP ....................................4-25
INSTALLING THE DC-CDI MAGNETO ..........................................4-25
TRANSMISSION........................................................................4-27
INSTALLING THE TRANSMISSION .............................................4-28
STARTER SYSTEM ..................................................................4-29
INSTALLING THE STARTER SYSTEM ..........................................4-30
PRIMARY AND SECONDARY SHEAVE ..........................................4-31
KICKSTARTER ........................................................................4-32
ASSEMBLING THE SECONDARY SHEAVE ....................................4-33
ASSEMBLING THE PRIMARY SHEAVE..........................................4-34
INSTALLING THE KICKSTARTER ................................................4-36
PISTON, CYLINDER AND CYLINDER HEAD (CS50) ........................4-37
PISTON, CYLINDER AND CYLINDER HEAD (CS50Z) .....................4-38
PISTON AND PISTON PIN .........................................................4-39
CYLINDER AND CYLINDER HEAD .............................................4-39
ENGINE REMOUNTING ............................................................4-41
CHAPTER 4
ENGINE
ENG