Yamaha FZS1000(N) 2001, Service Manual

Page: 228 / 403

5-21
VALVES AND VALVE SPRINGS
ENG
NOTE:
NOTE:
NOTE:
NOTE:
EAS00237
REMOVING THE VALVES
The following procedure applies to all of the
valves and related components.
Before removing the internal parts of the cylin-
der head (e.g., valves, valve springs, valve
seats), make sure that the valves properly seal.
1. Remove:
valve lifter 1
valve pad 2
Make a note of the position of each valve lifter
and valve pad so that they can be reinstalled in
their original place.
2. Check:
valve sealing
Leakage at the valve seat
Check the valve
face, valve seat, and valve seat width.
Refer to “CHECKING THE VALVE SEATS”.
a. Pour a clean solvent
a
into the intake and
exhaust ports.
b. Check that the valves properly seal.
There should be no leakage at the valve seat 1 .
3. Remove:
valve cotters 1
Remove the valve cotters by compressing the
valve spring with the valve spring compressor
2 and attachment 3 .
Valve spring compressor
90890-04019
Valve spring compressor
attachment
Intake valve
90890-04114
Exhaust valve
90890-04108