Removing The Valves - Yamaha VMX12 2001 Service Manual

VALVES AND VALVE SPRINGS
EAS00238

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:
NOTE:
@
Make a note of the position of each valve lifter
2 and valve pad 1 so that they can be rein-
stalled in their original place.
@
2. Check:
a. Pour a clean solvent a into the intake and
b. Check that the valves properly seal. There
3. Remove:
NOTE:
@
Remove the valve cotters by compressing the
valve springs with the valve spring compressor
2 and attachment 3.
@
4 - 25
• valve pad 1
• valve lifter 2
• valve (for leakage)
Leakage at the valve seat → Check the
valve face, valve seat, and valve seat width.
Refer to "CHECKING THE VALVE SEATS".
exhaust ports.
should be no leakage at the valve seat 1.
• valve cotters 1
Valve spring compressor
90890-04019
Attachment
90890-04114
ENG