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 ....................................................................................................5-12
REMOVING THE CAMSHAFT .................................................................5-14
CHECKING THE CAMSHAFT..................................................................5-15
CHECKING THE TIMING CHAIN AND CAMSHAFT SPROCKET ..........5-16
CHECKING THE TIMING CHAIN TENSIONERS ....................................5-16
CHECKING THE DECOMPRESSION SYSTEM......................................5-17
INSTALLING THE CAMSHAFTS .............................................................5-17
CYLINDER HEAD...........................................................................................5-20
REMOVING THE CYLINDER HEAD........................................................5-22
CHECKING THE TIMING CHAIN GUIDE (INTAKE SIDE) ......................5-22
CHECKING THE CYLINDER HEAD ........................................................5-22
INSTALLING THE CYLINDER HEAD ......................................................5-23
VALVES AND VALVE SPRINGS...................................................................5-25
REMOVING THE VALVES.......................................................................5-26
CHECKING THE VALVES AND VALVE GUIDES ...................................5-27
CHECKING THE VALVE SEATS .............................................................5-28
CHECKING THE VALVE SPRINGS.........................................................5-30
CHECKING THE VALVE LIFTERS ..........................................................5-31
INSTALLING THE VALVES .....................................................................5-31
CYLINDER AND PISTON...............................................................................5-33
REMOVING THE PISTON .......................................................................5-34
CHECKING THE CYLINDER AND PISTON ............................................5-34
CHECKING THE PISTON RINGS............................................................5-35
CHECKING THE PISTON PIN .................................................................5-36
INSTALLING THE PISTON AND CYLINDER ..........................................5-36

ENGINE

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