Honda Fourtrax Rancher AT 2004 Service Manual page 172

CYLINDER HEADIVALVE/CAMSHAFT
8-14
REFACING
NOTE:
• Follow the retaeer manufacturer's operating , -- - - -- - - - - - - - - -- --,
instructions .
• Be careful nOI to grind the seat more than neces-
say.
If the contact area is too high on the valve, the seat
must be lowered using a 32° flat cutter.
tf
the contact area is too low on the valve, the seat
must be raised using a 60" interior cutter.
I
L A
45·
'\ L \
~o.
CONTACT TOO HIGH
'~
. .
~LDSEAT WIDTH
~~ 32"
CONTACT TOO LOW
~
. .
~LDSEATWIDTH
"~ 60.
Using a 45" seat cutter, remove any roughness or
~================~
irregularities from the seat.
TOOLS:
Seat cutter, 35 mm (IN)
Seat cutter, 29 mm (EX)
Cutter holder, 5.5 mm
07780-0010400
07780-0010300
07781-0010101
or equivalent commercially available in U.S.A.
ROUGHNESS
Using a 32° flat cutter, remove 1/4 of the existing
~=~::::::::::::::::::::::::::::::::::::~====~
valve seat material.
TOOLS:
Flat cutter, 35 mm (IN)
Flat cutter, 30 mm (EX)
Cutter holder, 5.5 mm
07780-0012300
07780-0012200
07781 -0010101
or equivale nt commen::ially ava ilable in U.S.A.
OLD SEAT W IDTH
32·