3-32 ENGINE
BOTTOM NARROWING CUT
• If the contact area
W
is too wide or too low, use the 60° cutter
to narrow and raise the contact area.
FINAL SEAT CUT
• If the contact area
W
is too low or too narrow, use the 45° cut-
ter to raise and widen the contact area.
NOTE:
After cutting the 15°, 30° and 60° angles, it is possible that the
valve seat (45°) is too narrow. If so, recut the valve seat to the
correct width.
• After the desired seat position and width is achieved, use the
45° cutter very lightly to clean up any burrs caused by the pre-
vious cutting operations.
NOTE:
After servicing the valve seats, be sure to check the tappet
clearance after the cylinder head has been reinstalled. (
2-9)
• Clean and assemble the head and valve components. Fill the
intake and exhaust ports with gasoline to check for leaks.
• If any leaks occur, inspect the valve seat and face for burrs or
other things that could prevent the valve from sealing.
"
60˚
Too low or too narrow
contact surface on valve
Do not use lapping compound after the final cut is
made. The finished valve seat should have a velvety
smooth finish but not a highly polished or shiny fin-
ish. This will provide a soft surface for the final seat-
ing of the valve which will occur during the first few
seconds of engine operation.
45˚
Always use extreme caution when handling gasoline.
Summary of Contents for AN650 2002
Page 1: ......
Page 47: ...PERIODIC MAINTENANCE 2 29 ...
Page 124: ...ENGINE 3 73 POSITION OF CAMSHAFTS AND SPROCKETS 15 1 1 2 2 3 3 ...
Page 137: ...CVT 5 3 Remove the CVT mounting bolts Remove the CVT assembly ...
Page 425: ...SERVICING INFORMATION 11 21 FUEL TANK MOUNTING ...
Page 426: ...11 22 SERVICING INFORMATION FUEL TANK MOUNTING Only for E 28 ...
Page 462: ...Prepared by July 2002 Part No 99500 36110 01E Printed in Japan 464 ...
Page 463: ......