Honda BF15D Manual page 176

BFlSDmBFPOD
Intake
Exhaust
__
.
VALVE GUIDES
1) Ream the valve guide to remove any deposits before
checking the valve guide I.D.
Insert the valve guide reamer from the combustion
chamber side of the head and always rotate the ream-
er clockwise.
2) Measure and record the valve guide I.D.
5.000
-
5.012 mm
(0.1969
-
0.1973 in)
(0.1969
-
0.1973 in)
5.04 mm
(0.1 98 in)
(0.198 in)
l - 1
I
Standard
T
Service limit
1
Intake
Exhaust
Standard Service limit
0.01 0
-
0.037 mm
(0.0004
-
0.001 5 in)
0.030
-
0.067 mm
(0.001 2
-
0.0026 in)
0.07 mm
(0.003 in)
0.12 mm
(0.005 in)
3) Substrate each valve stem O.D. from the corresponding
guide I.D. to obtain the stem-to-guide clearance.
4) If the stem-to-guide clearance is out of the specification,
determine if a new valve with standard dimensions would
bring the clearance within tolerance. If so, replace the
valve as necessary. If the clearance is out of the specifi-
cation with the new valve, replace the cylinder head as
assembly.
4. VALVE SEAT REFACING
Recondition the valve seat. Follow the valve seat cutter
Be careful not to grind the seat more than necessary.
manufacturer's Instructions.
1 1
1
VALVE GUIDE
REAMER
I
07984 -MA60001
\
-MA60001
[GGi]
[ l ] CUTTER HOLDER
07781 -001 0400
/
[
s.
TOOLJ
[2] VALVE SEAT CUTTER
131
141
151
IN, 27.5 mm:
07780-0010200
6 h 5
EX, 22 mm:
07780-001 0701
T H O o
IN, 30 mm: 07780-0012200
EX, 25 mm:
07780-0012000
32"
IN, 26 mm: 07780-0014500
EX, 22 mm: 07780-0014202
10-1 4