Yamaha YZ450FX 2019 Owner's Service Manual page 223

EAM20108
VALVES AND VALVE SPRINGS
Removing the valves and valve springs
Order Job/Parts to remove
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
VALVES AND VALVE SPRINGS
Q'ty
Refer to "CYLINDER HEAD" on page 5-19.
4
4
8
4
4
4
4
2
2
5-24
Remarks