Honda CB HORNET 160R 2015, Руководство по ремонту

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7-16
CYLINDER HEAD/VALVES
• Contact area (too high or too low area)
– Reface the valve seat.
VALVE SEAT REFACING
Valve Seat Cutters, a grinder or equivalent valve seat
refacing equipment are recommended to correct a worn
valve seat.
If the contact area is too high on the valve, the seat must
be lowered using a 32 degree flat cutter.
If the contact area is too low on the valve, the seat must
be raised using a 60 degree inner cutter.
Use a 45 degree cutter to remove the roughness or
irregularities from the seat.
TOOLS:
Seat cutter, 27.5 mm (EX) 07780-0010200
Seat cutter, 29 mm (IN) 07780-0010300
Cutter holder 07781-0010400
45°
60°
32°
CONTACT TOO HIGH
CONTACT TOO LOW
OLD SEAT
WIDTH
OLD SEAT
WIDTH
TOO LOW TOO HIGH
The valve can-
not be ground-
ed. If the valve
face is burned
or badly worn or
if it contacts the
seat unevenly,
replace the
valve.
Follow the
refacing
manufacture’s
operating
instructions.
Reface the
valve seat with
a 45 degree
cutter when a
valve guide is
replaced.
32°
60°
VALVE SEAT CUTTER
ROUGHNESS