Valves And Valve Springs; Removal - Yamaha FX10X 2008 Service Manual

VALVES AND VALVE SPRINGS

REMOVAL

The following procedure applies to all of the valves
and related components.
NOTE:
Before removing the internal parts of the cylinder
head (e.g., valves, valve springs, valve seats),
make sure the valves properly seal.
1. Remove:
• Valve lifter 1
• Valve pad 2
NOTE:
Make a note of the position of each valve lifter and
valve pad so that they can be reinstalled in their
original place.
2. Inspect:
• Valve
(for leakage)
Leakage at the valve seat → Check the valve
face, valve seat, and valve seat width.
Inspection steps:
• Pour a clean solvent a into the intake and
exhaust ports.
• Check that the valves properly seal.
NOTE:
There should be no leakage at the valve seat 1.
3. Remove:
• Valve cotters
NOTE:
Remove the valve cotters by compressing the valve
spring with the valve spring compressor 1 and
valve spring compressor attachment 2.
5-31
ENG
Valve spring compressor:
90890-04019, YM-04019
Valve spring compressor attach-
ment:
90890-04114
Valve spring compressor adapter
19.5 mm:
YM-04114