Honda 2010 CRF250R Service Manual page 201

Use a
32"
fla t cutter, remove 1/4 of the existing valve
seat material.
TOOLS :
IN :
Flat cutter, 33 mm
Cutter holder, 5.0 mm
EX :
Flat cutter, 27 mm
Cutter holder, 4.5 mm
07780-0012900
07781-0010400
07780-0013300
07781·0010600
or equivalent commercially available in U.S.A.
CYLINDER HEADNALVES
XDSEATWIDTH
•
\
32"
cJ
'----
Use a 60" interior cutter, remove 1f4 of the existing
~'---==---============--~
valve seat material.
TOOLS:
IN :
Interior cutter, 34 mm
Cutter holder, 5.0 mm
EX :
Interior cutter, 26 mm
Cutter holder, 4.5 mm
07780-0014700
07781-0010400
07780-0014500
07781·0010600
or equivalent commercially available in U.S.A.
Using a
45"
seat cutter. cut the seat
to
proper width.
Make sure all pitting and irregularities are removed .
Refinish if necessary.
STANDARD:
IN/EX: 0.90 - 1.10 mm (0.035 - 0.043 in)
~SEATWIDTH
\
~EATWIDTH
- - -------'
45' "
,
8-25