5-43
CAMSHAFT AND VALVES
(4)Bore the valve guide using the valve
guide reamer.
NOTE:
When installing and removing the valve
guide reamer, apply machining oil and turn
the reamer clockwise
REFACING THE VALVE SEAT
NOTE:
After refacing the valve seat or replacing
the valve and valve guide, lap the valve
seat and valve face.
Reface:
Valve seat
CAUTION:
When turning the valve seat cutter, keep
an even downward pressure (4 - 5 kg) to
prevent chatter mark.
Valve guide reamer:
NA/90890-06804
Valve seat width
(intake valve and exhaust valve):
0.6 - 0.8 mm (0.02 - 0.03 in)
Valve seat cutter set:
YM-91043-C/90890-06803
Valve seat lapper:
NA/90890-04101
Cut section of follows
Section
Cutter
A
90°
B
45°
C
30°
Summary of Contents for F6Z
Page 1: ...SERVICEMANUAL LIT 18616 02 19 68T 28197 ZA 11 F6Z F8Z ...
Page 28: ...2 11 MAINTENANCE SPECIFICATIONS OUTBOARD DIMENSIONS ...
Page 54: ...3 20 GENERAL LUBRICATION POINTS Apply Water resistant grease NOTE Use a grease gun ...
Page 55: ...3 21 GENERAL ...
Page 199: ...Printed on recycled paper Printed in USA Apr 2000 x 1 F6AMH F8CMH YAMAHA MOTOR CO LTD ...
Page 202: ...SUPPLEMENTARY SERVICEMANUAL 69G 28197 1A 1X T8PH T8PR LIT 18616 02 31 ...
Page 223: ...MAINTENANCE SPECIFICATIONS 13 OUTBOARD DIMENSIONS T8PH T8MH FT8DMH ...
Page 225: ...MAINTENANCE SPECIFICATIONS 15 OUTBOARD DIMENSIONS FT8DEP T8PR FT8DE T8ER ...