Yamaha F40B - Power Unit

POWR
67C3K11
Power unit
Power unit (check and adjustment)..............................................................5-1
Checking the compression pressure .........................................................5-1
Checking the oil pressure ..........................................................................5-1
Checking the valve clearance....................................................................5-2
Replacing the timing belt ...........................................................................5-3
Manual starter (M and W model)...................................................................5-7
Disassembling the manual starter .............................................................5-9
Checking the manual starter......................................................................5-9
Assembling the manual starter................................................................5-10
Power unit.....................................................................................................5-13
Power unit assembly ...............................................................................5-13
Starter motor, starter relay, and PTT relay (E and W model) ..................5-15
Ignition coil, CDI unit, and Rectifier Regulator.........................................5-16
Throttle cam.............................................................................................5-18
Removing the power unit.........................................................................5-20
Timing belt and sprocket.............................................................................5-22
Removing the timing belt and sprocket ...................................................5-23
Checking the timing belt and sprocket.....................................................5-24
Installing the sprocket and timing belt .....................................................5-24
Cylinder head ...............................................................................................5-26
Removing the cylinder head ....................................................................5-29
Disassembling the cylinder head.............................................................5-29
Checking the cylinder head .....................................................................5-30
Checking the valve spring .......................................................................5-30
Checking the valve ..................................................................................5-30
Checking the valve guide ........................................................................5-31
Replacing the valve guide .......................................................................5-31
Checking the valve seat ..........................................................................5-32
Refacing the valve seat ...........................................................................5-33
Checking the rocker arm and rocker arm shaft .......................................5-35
Checking the camshaft ............................................................................5-35
Assembling the cylinder head..................................................................5-36
Installing the cylinder head ......................................................................5-39