Panterra Fusion Service Manual page 84

NIKOTA USA: PANTERRA SCOOTER SERVICE MANUAL
7. Cylinder Head Valve
3. Press in the new valve guide. Spread engine
oil on new o-ring and build up new valve guide
pipe. Make sure cylinder head is still warm
when pressing in new guides.
4. Size valve guide with reamer after installing.
Use cutting oil on reamer. Rotate
reamer in proper direction and do not
stop rotation to punch in or pull out.
5. Clean cylinder head and get rid of cut bits of
metal and dust.
Special tools
•Valve guide pipe reamer
•Valve Seat Checking and Correcting
•Valve Seat Checking
6. Remove carbon deposit from combustion
chamber valves.
7. Spread emery on seat surface between
valve and valve seat. Use polishing bar to wear
in valve.
8. Take out valve and check valve seat surface.
Change if valve surface is course or facial
polished.
Valve seat surface width checking
Used limit: above 1.8mm (.07 in.) correct.
9. Correct valve seat with chamfered tool if
surface width is not even, too wide or too
narrow.
CHAPTER 7: CYLINDER HEAD VALVE
3
4
VALVE PIPE REAMER
9
7-11
VALVE GUIDE
SCREW DRIVER
TO PRY OUT
GUIDE
1.8mm
(.07 in.) max
VALVE SEAT
SURFACE WIDTH
81