Eng - Yamaha XC50V Service Manual

ENGINE ..................................................................................................... 5-1
LEADS, HOSES AND REAR BRAKE ............................................... 5-1
MANIFOLD, AIR FILTER AND MUFFLER ASSEMBLY ................... 5-3
INSTALLING THE ENGINE ............................................................... 5-4
CYLINDER HEAD ..................................................................................... 5-5
REMOVING THE CYLINDER HEAD................................................. 5-6
CHECKING THE CYLINDER HEAD ................................................. 5-8
INSTALLING THE CYLINDER HEAD ............................................... 5-9
THE ROCKER ARMS AND CAMSHAFT .............................................. 5-12
REMOVING THE ROCKER ARMS AND CAMSHAFT ................... 5-13
CHECKING THE CAMSHAFT......................................................... 5-13
CHECKING THE ROCKER ARMS AND ROCKER ARM
SHAFTS........................................................................................ 5-14
CHECKING THE TIMING CHAIN, CAMSHAFT SPROCKETS, AND
TIMING CHAIN GUIDES .............................................................. 5-16
CHECKING THE TIMING CHAIN TENSIONER ............................. 5-16
INSTALLING THE CAMSHAFT AND ROCKER ARMS ................. 5-17
VALVES AND VALVE SPRINGS ............................................................ 5-18
REMOVING THE VALVES ............................................................... 5-19
CHECKING THE VALVES AND VALVE GUIDES ........................... 5-20
CHECKING THE VALVE SEATS ..................................................... 5-22
CHECKING THE VALVE SPRINGS ................................................ 5-24
INSTALLING THE VALVES .............................................................. 5-25
CYLINDER AND PISTON....................................................................... 5-27
REMOVING THE CYLINDER AND PISTON .................................. 5-28
CHECKING THE CYLINDER AND PISTON ................................... 5-29
CHECKING THE PISTON RINGS ................................................... 5-30
CHECKING THE PISTON PIN ........................................................ 5-31
CHECKING THE TIMING CHAIN GUIDE ....................................... 5-32
INSTALLING THE PISTON AND CYLINDER ................................. 5-32
BELT DRIVE............................................................................................ 5-34
CRANKCASE COVER (LEFT) ........................................................ 5-34
INSTALLING THE KICKSTARTER .................................................. 5-35
V-BELT, CLUTCH, PRIMARY AND SECONDARY SHEAVE ......... 5-36
REMOVING THE PRIMARY SHEAVE ............................................ 5-38
REMOVING THE SECONDARY SHEAVE AND V-BELT................ 5-38
DISASSEMBLING THE SECONDARY SHEAVE ........................... 5-39
CHECKING THE CLUTCH SHOE .................................................. 5-39
CHAPTER 5
ENGINE
5-66

ENG