Removing The Valves - Yamaha YJ125S Service Manual

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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. Check:
*****************************************************
a. Pour a clean solvent a into the intake and
b. Check that the valves properly seal.
NOTE:
There should be no leakage at the valve seat
1.
*****************************************************
2. Remove:
3
NOTE:
Remove the valve cotters by compressing the
valve spring with the valve spring compressor
2 and the valve spring compressor attachment
3.
5-20
8 valve sealing
Leakage at the valve seat
valve face, valve seat, and valve seat
width.
Refer to "CHECKING THE VALVE
SEATS".
exhaust ports.
8 valve cotters 1
Valve spring compressor
90890-04109 (YM-04109)
Valve spring compressor attach-
ment
90890-04108 (YM-04108)
ENG
Check the