Yamaha F2.5C, Service Manual

Page: 60 / 184

POWR
6D55F11
Power unit
Special service tools ..................................................................................... 5-1
Power unit....................................................................................................... 5-3
Checking the compression pressure ......................................................... 5-3
Checking the oil pressure .......................................................................... 5-3
Checking the valve clearance.................................................................... 5-4
Disassembling the manual starter ........................................................... 5-13
Checking the spiral spring ....................................................................... 5-13
Measuring the starter rope ...................................................................... 5-13
Assembling the manual starter ................................................................ 5-13
Installing the starter rope ......................................................................... 5-14
Removing the timing belt and sprockets.................................................. 5-15
Checking the timing belt and sprockets................................................... 5-17
Installing the sprockets and timing belt.................................................... 5-17
Removing the power unit......................................................................... 5-18
Cylinder head ............................................................................................... 5-20
Removing the cylinder head .................................................................... 5-23
Checking the valve springs...................................................................... 5-24
Checking the valves ................................................................................ 5-24
Checking the valve guides....................................................................... 5-25
Replacing the valve guides...................................................................... 5-25
Checking the valve seat .......................................................................... 5-26
Refacing the valve seat ........................................................................... 5-26
Checking the rocker arms and rocker arm shaft...................................... 5-28
Checking the camshaft ............................................................................ 5-29
Checking the cylinder head ..................................................................... 5-29
Checking the oil pump ............................................................................. 5-30
Installing the valves ................................................................................. 5-30
Installing the camshaft............................................................................. 5-31
Installing the rocker arm shaft assembly ................................................. 5-32
Installing the oil pump.............................................................................. 5-32