Yamaha Scorpio - CHAPTER 4. ENGINE OVERHAUL

ENG
CHAPTER 4.
ENGINE OVERHAUL
ENGINE REMOVAL
......................................................................................4-1
ENGINE OIL ..........................................................................................4-1
EXHAUST PIPE ASSEMBLY ................................................................4-1
LEFT FOOTREST BRACKET ...............................................................4-2
DRIVE CHAIN ........................................................................................4-2
CARBURETOR ......................................................................................4-3
WIRE, CABLE AND TUBE ....................................................................4-3
STARTER MOTOR ................................................................................4-4
ENGINE .................................................................................................4-4
ENGINE INSTALLATION
.............................................................................4-5
ENGINE ASSEMBLY .............................................................................4-5
STARTER MOTOR ................................................................................4-5
WIRE AND CABLES ..............................................................................4-5
CARBURETOR ......................................................................................4-6
DRIVE CHAIN ........................................................................................4-6
LEFT FOOTREST BRACKET ...............................................................4-6
EXHAUST ASSEMBLY .........................................................................4-7
FUEL TANK AND SEAT ........................................................................4-7
CYLINDER HEAD
.........................................................................................4-9
CYLINDER HEAD REMOVAL .............................................................4-10
CYLINDER HEAD INSPECTION .........................................................4-12
TIMING CHAIN TENSIONER INSPECTION .......................................4-13
CYLINDER HEAD INSTALATION .......................................................4-14
CAMSHAFT AND ROCKER ARMS
..........................................................4-16
ROCKER ARM AND CAMSHAFT REMOVAL ....................................4-17
CAMSHAFT INSPECTION ..................................................................4-18
ROCKER ARMS AND ROCKER ARM SHAFTS INSPECTION ..........4-18
CAMSHAFT AND ROCKER ARM INSTALLATION ............................4-19
VALVES AND VALVE SPRINGS
...............................................................4-21
VALVE AND VALVE SPRINGS REMOVAL ........................................4-22
VALVES AND VALVE SPRINGS INSPECTION .................................4-24
VALVE SEATS INSPECTION .............................................................4-25
VALVES AND VALVE SPRINGS INSTALLATION ..............................4-27
CYLINDER AND PISTON
...........................................................................4-29
PISTON REMOVAL .............................................................................4-30
CYLINDER INSPECTION ....................................................................4-31
PISTON AND PISTON PIN INSPECTION ..........................................4-32
PISTON RINGS INSPECTION ............................................................4-33
PISTON RINGS, PISTON AND CYLINDER INSTALLATION .............4-34