Engine - Yamaha YZ450F Owner's Service Manual

ENGINE REMOVAL .........................................................................................5-1
REMOVING THE SILENCER.....................................................................5-6
REMOVING THE EXHAUST PIPE 2..........................................................5-6
REMOVING THE DRIVE SPROCKET .......................................................5-6
REMOVING THE ENGINE .........................................................................5-7
CHECKING THE SILENCER AND EXHAUST PIPE..................................5-7
CHANGING THE SILENCER FIBER .........................................................5-7
INSTALLING THE ENGINE........................................................................5-8
INSTALLING THE BRAKE PEDAL ............................................................5-9
INSTALLING THE DRIVE SPROCKET......................................................5-9
INSTALLING THE EXHAUST PIPE AND MUFFLER...............................5-10
CAMSHAFT ....................................................................................................5-11
REMOVING THE CAMSHAFT .................................................................5-13
CHECKING THE CAMSHAFT..................................................................5-14
CHECKING THE TIMING CHAIN AND CAMSHAFT SPROCKET ..........5-15
CHECKING THE TIMING CHAIN TENSIONERS ....................................5-15
CHECKING THE DECOMPRESSION SYSTEM......................................5-16
INSTALLING THE CAMSHAFTS .............................................................5-16
CYLINDER HEAD...........................................................................................5-19
REMOVING THE CYLINDER HEAD........................................................5-21
CHECKING THE TIMING CHAIN GUIDE (INTAKE SIDE) ......................5-21
CHECKING THE CYLINDER HEAD ........................................................5-21
INSTALLING THE CYLINDER HEAD ......................................................5-22
VALVES AND VALVE SPRINGS...................................................................5-24
REMOVING THE VALVES.......................................................................5-25
CHECKING THE VALVES AND VALVE GUIDES ...................................5-26
CHECKING THE VALVE SEATS .............................................................5-27
CHECKING THE VALVE SPRINGS.........................................................5-29
CHECKING THE VALVE LIFTERS ..........................................................5-29
INSTALLING THE VALVES .....................................................................5-30
CYLINDER AND PISTON...............................................................................5-32
REMOVING THE PISTON .......................................................................5-33
CHECKING THE CYLINDER AND PISTON ............................................5-33
CHECKING THE PISTON RINGS............................................................5-34
CHECKING THE PISTON PIN .................................................................5-35
INSTALLING THE PISTON AND CYLINDER ..........................................5-35

ENGINE

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