Honda TRX400EX FOURTRAX 1999, Service Manual

Page: 100 / 263

CYLINDER
NOTE:
Follow the manufacturer's operating
instructions.
Be careful not to grind the seat more than neces-
sary.
If the contact area i s too high on the valve, the seat
must be lowered using a 32" flat cutter.
If the contact area is too low
on
the valve, the seat
must be raised using a 60" interior cutter.
Using a
45"
seat cutter, remove any roughness or
irregularities from the seat.
TOOLS
Valve seat cutter, 35
mm
Valve seat cutter, 29
mm
07780
-
07780
-
0010300
Cutter holder, 5.5 mm 07781-0010101
or equivalent commercially available
in U.S.A.
Using
a 32"
flat cutter, remove of the existing
valve seat material.
TOOLS:
Flat cutter,
35 mm (IN) 07780-0012300
Flat cutter, 30 mm 07780-0012200
Cutter holder,
5.5
mm 07781-0010101
or equivalent commercially available
in U.S.A.
OLD SEAT
WIDTH
CONTACT TOO HIGH
OLD SEAT
WIDTH
CONTACT TOO LOW
ROUGHNESS
\
OLD SEAT WIDTH
\
7-14