Yamaha YZ450FF 1SL-28199-11 Owner's Service Manual page 220

VALVES AND VALVE SPRINGS
EAS1SL5221
Removing the valves and valve springs
Order
Cylinder head
Valve lifter
1
Adjusting pad
2
Valve cotter
3
Valve spring retainer
4
Valve spring
5
Valve stem seal
6
Valve spring seat
7
Intake valve
8
Exhaust valve
9
VALVES AND VALVE SPRINGS
Part name
5-25
Q'ty Remarks
Refer to "CYLINDER HEAD" on page 5-20.
4
4
8
4
4
4
4
2
2
For installation, reverse the removal proce-
dure.