Honda CRF50F 2004-2015 Service Manual page 89

Use a 45" seat cutter to remove any roughness or
irregularities from the seat.
TOOLS:
Seat cutter. 24 mm (45" IN)
Seat cutter, 20.5 mm (45 0 EX)
Cutter holder, S mm
07780·0010600
07780·0011000
07781·0010400
or equivalent commercially available in U.S .A.
CYLINDER HEADIV ALVES
ROUGHNESS
Use a 32° o r 30° cutter to remove the l Op
1/4
of the
~==~~~~~~~~~~'====~
existing valve seat material.
TOOLS:
Flat cutter. 24 mm (32 0 IN)
Flat cutter. 21 .5 mm (32
0
EX)
Cutter ho lder. 5mm
07780·0012500
07780·0012800
07781·0010400
or equivalent commercially available in U.S.A .
~SEATWIDTH
30"
I
Use a 50" cutter, remove 1/4 of the existi ng valve
~===
_ ==============;
seat material.
~~lD
SEAT WIDTH
TOOLS: ' "
Intenor c utter, 22 mm (60" IN / EX )07780-0014202
Cutter holder, S mm 07781·0010400 '\...
or equivalent commercially available in U.S.A. ,
-----L
J
60"
Using a 45° seat cutter, cut the seat to the proper
~================~
wid th .
VALVE SEAT WIDTH: 1.0 - 1.3 mm (0 .04 - O.OS in)
Make su re that all pitting and irregular ities are
removed.
-
1.0-1.3mm
10.04 - 0.05 in)
---------' 45"L
7-13