Cylinder Head Standards - Honda Nighthawk CB 750 1991 Service Manual

General Information
Camshaft journal 0.0. (A)
(B)
Camshaft holder I.D. (A)
(B)
Valvestem O.D. IN
EX
Unit:mm(i~
-Cylinder Head
Item
Cylinder compression
Cylinder compression synchronization difference
Valve clearance IN
EX
Cylinder head warpage
Cam lobe height(1 IN
IN(California model)
EX
EXICalifornia model)
Camshaft runout
(2
Camshaft oil clearance A
B
Valve guide I . D . IN
EX
Stem-to-guide clearance IN
EX
Valve guide projection above cylinder head IN
EX
Before guide installation:
1. Chill the valve guides in the freezer section of a
refrigerator for about an hour.
2 . Heat the cylinder head to 100-1 50.C (21 2-300°F)
Valve seat width
Valve spring free length IN
EX
inner IN
inner EX
outer IN
outer EX
Standard
981 -1 373kPa(142-199ps1,10-14kg/cm)
250/rpm
-
-
-
-
32.252-32.41 Z(1.2697-1.2760)
32.252-32.412(1.2697-1.2760)
32.136-32.296(1.2651-1.2714)
32.136-32.296(1.2651-1.2714)
-
0.020-0.062(0.0007-0.0024)
0.055-0.097(0.0021 -0.0038)
25.959-25.980 (1.0220-1.0228)
25.929-25.950 (1.0208-1.0216)
26.0-26.033 (1.0236-1.0249)
26.010-26.031 (1.0240-1.0248)
4.975-4.990 (0.1959-0.1965)
4.955-4.970 (0.1951 -0.1957)
5 . 0 0 0 - 5 . 0 1 2 (0.1969-0.1973)
5.000-5.012 (0.1969-0.1973)
0.010-0.037 (0.0006-0.0017)
0.030-0.057 (0.0012-0.0022)
-
-
0 . 9 - 1 . 1
4 3 . 7 (1.720)
43.7 (1.720)
-
-
-
service ~ i m i t
-
392kPa(57ps1
4kg/cnm
)
-
-
0 . 1 0 (0.004)
32.17 (1.266)
32.17 (1.266)
32.05 (0.907)
32.05 (0.907)
0 . 1 0 (0.004)
0.09 (0.003)
0.1 2 (0.004)
Rocker arm I.D. IN
EX
Sub-rocker arm I.D. IN
EX
Rocker arm shaft O.D. IN
EX
Sub-rocker arm shaft O.D. IN
EX
Rocker arm-to-rocker arm shaft clearance
Sub-rocker arm-to-rocker arm shaft clearance
Valve lifter O.D.
Valve lifter bore I. D
Hydraulic lash adjuster assist spring free length
Hydraulic lash adjuster compression stroke with kerosene
1
c 2 1 0 - 0 0 0 8 )