Checking The Valve Seat - Yamaha MX360 Service Manual

b
a
a
302-028
a
a
VALVE
5. Measure:
9 Compressed valve spring force a
9 Installed length b
Out of specification → Replace.
Installed compression spring
force:
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
Installed length:
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
6. Measure:
9 Valve spring tilt a
Tilt limit:
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
Out of specifications → Replace.
7. Check:
9 Valve spring contact surface a
More than 2/3 of the contact surface
does not contact → Replace.

CHECKING THE VALVE SEAT

1. Remove carbon deposits from the valve
face and valve seat.
2. Apply a small amount of coarse mechan-
ic's blueing dye (Dykem) to the valve face
a.
3. Insert the valve into the valve guide and
use a valve lapper to contact the valve
face with the valve seat.
3-27
ENG