Yamaha XF50W Service Manual page 180

VALVES AND VALVE SPRINGS
y-
4 . Remove:
NOTE:
Identify the position of each part very carefully
so that it can be reinstalled in its original place.
5-23
Valve spring compressor
90890-04019
YM-04019
Valve spring compressor attach-
ment
90890-04148
YM-04148
8valve spring retainer 1
8valve spring 2
8valve stem seal 3
8valve spring seat 4
8valve 5