Removing The Valves - Yamaha XF50W Service Manual

VALVES AND VALVE SPRINGS
EAS00237

REMOVING THE VALVES

The following procedure applies to all of the
valves and related components.
NOTE:
Before removing the internal parts of the cylin-
der head (e.g., valves, valve springs, valve
seats), make sure the valves properly seal.
1. Remove:
8valve pad 1
NOTE:
Make a note of the position of each valve pad
so that they can be reinstalled in their original
place.
2. Check:
• valve sealing
valve face, valve seat, and valve seat
width.
• • • • • • • • • • • • • • • • • • • • • • •
a. Pour a clean solvent a into the intake and
exhaust ports.
b. Check that the valves properly seal.
NOTE:
There should be no leakage at the valve seat
©.
•••••••••••••••••••••••
3 . Remove:
valve cotters 1
NOTE:
Remove the valve cotters by compressing the
valve spring with the valve spring compressor
and the valve spring compressor attachment 2 .
5-22
ENG
Leakage at the valve seat
Refer to "CHECKING THE VALVE
SEATS".
%m
-» Check the