Suzuki DF2.5 Service Manual page 78

Valve seat contact
valve seat contact width as follows.
carbon from the valve and seat.
with Prussian Blue
3. the valve into valve guide.
4. Put the on the valve head.
5. the
contact area
6. Prussian
blue.
7. valve seat contact
If measurement exceeds valve seat.
NOTE:
Clean head valve compo-
nents.
Fill the intake and the exhaust with solvent order to
check leaks between the valve seat and the valve.
If any leaks occur, the valve seat and the face for burrs
or other could the valve from
UNIT 6·15