Yamaha YZ450F Owner's Service Manual page 220

VALVES AND VALVE SPRINGS
EASB111218
Removing the valves and valve springs
Order
Cylinder head
1 Valve lifter
2 Adjusting pad
3 Valve cotter
4 Valve spring retainer
5 Valve spring
6 Valve stem seal
7 Valve spring seat
8 Intake valve
9 Exhaust valve
Part name
5-25
VALVES AND VALVE SPRINGS
Q'ty
Refer to "CYLINDER HEAD" on page 5-20.
4
4
8
4
4
4
4
2
2
For installation, reverse the removal proce-
dure.
Remarks