Honda CRF50F 2004-2015 - Page 89

Use a 45" seat cutter to remove any r oughness 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 eq ui valent com merci a ll y availab le in U.S .A.
CYLINDER HEADIV ALVES
ROUGHNESS
Use a 32° or 30° cutter to remove the l Op 1/4 of the ~==~~~~~ ~~~~~ '= ===~
exi sting valve seat material.
TOOLS:
Flat c utter . 24 mm (32
0
IN)
Flat cutter.
21 .5 mm (32
0
EX)
Cutter ho ld er. 5mm
07780·0012500
07780·0012800
07781·0010400
or eq ui valent commercially available in U.S.A.
~SEATWIDTH
30"
I
Use a 50" cutter, r emove 1/4 of the existi ng valve ~=== _ ========= = ====;
seat material. ~~lD SEAT WIDTH
TOOLS: '"
Intenor c utt er, 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 irregularities are
removed.
-
1.0-1.3mm
10 .04 - 0.05 in)
---------' 45 "L
7-13