Honda NC700 2012 Service Manual page 310

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SERVICE INFORMATION
GENERAL
• This section covers service of the cylinder head, valves, camshaft and rocker arm.
• The rocker arm services can be done with the engine installed in the frame. The cylinder head, valves and camshaft service
requires engine removal.
• When disassembling, mark and store the disassembled parts to ensure that they are reinstalled in their original locations.
• Clean all disassembled parts with cleaning solvent and dry them by blowing them off with compressed air before inspection.
• Camshaft lubricating oil is fed through oil passages in the cylinder head. Clean the oil passages before assembling cylinder
head.
• Be careful not to damage the mating surfaces when removing the cylinder head cover and cylinder head.
SPECIFICATIONS
Cylinder compression at 470 min
Valve clearance
Rocker arm, Rocker arm I.D.
rocker arm
Rocker arm shaft O.D.
shaft
Rocker arm-to-shaft clearance
Cam chain tensioner wedge B length
Camshaft Cam lobe height
Runout
Camshaft journal O.D.
Valve, valve Valve stem O.D.
guide
Valve guide I.D.
Stem-to-guide
clearance
Valve guide
projection above
cylinder head
Valve seat width
Valve spring free length
Cylinder head warpage
Cylinder head camshaft journal I.D.
Cylinder head-to-camshaft clearance
TORQUE VALUES
ITEM
Cylinder head cover socket bolt
Breather plate mounting bolt
Rocker arm shaft bolt
Camshaft maintenance cap
Cam chain tensioner bolt
Cam sprocket bolt
Water hose band screw
Insulator band screw
Cylinder head special bolt
ITEM
-1
(rpm)
IN
EX
IN
EX
IN
EX
IN/EX
IN
EX
IN
EX
IN
EX
THREAD
Q'TY
DIA. (mm)
3 6
8 6
3 8
1 36
2 6
1 10
6 –
1 5
6 9
CYLINDER HEAD/VALVES
STANDARD
2
1,775 kPa (18.1 kgf/cm , 257 psi)
0.17 ± 0.02 (0.007 ± 0.001)
0.28 ± 0.02 (0.011 ± 0.001)
20.012 – 20.030 (0.7879 – 0.7886)
19.972 – 19.993 (0.7863 – 0.7871)
0.019 – 0.058 (0.0007 – 0.0023)
–
34.7897 – 35.0297 (1.36967 – 1.37912)
34.9227 – 35.1627 (1.37491 – 1.38436)
–
41.935 – 41.950 (1.6510 – 1.6516)
4.975 – 4.990 (0.1959 – 0.1965)
4.965 – 4.980 (0.1955 – 0.1961)
5.000 – 5.012 (0.1969 – 0.1973)
0.010 – 0.037 (0.0004 – 0.0015)
0.020 – 0.047 (0.0008 – 0.0019)
17.7 – 18.0 (0.70 – 0.71)
19.6 – 19.9 (0.77 – 0.78)
0.90 – 1.10 (0.035 – 0.043)
1.30 – 1.50 (0.051 – 0.059)
49.07 (1.932)
–
41.995 – 42.019 (1.6533 – 1.6543)
0.045 – 0.084 (0.0018 – 0.0033)
TORQUE
N·m (kgf·m, lbf·ft)
10 (1.0, 7)
12 (1.2, 9) Apply locking agent to the threads.
Coating width; 6.5 ± 1.0 mm (0.26 ±
0.04 in) except 2.0 ± 1.0 mm (0.08 ±
0.04 in) from tip
29 (3.0, 21) Apply engine oil to the threads and
seating surface.
4.0 (0.4, 3.0) See page 10-11
See page 10-28
12 (1.2, 9)
56 (5.7, 41) Apply engine oil to the threads and
seating surface.
– See page 10-16
– See page 10-25
44 (4.5, 32) Apply molybdenum oil solution to the
threads and seating surface.
Unit: mm (in)
SERVICE LIMIT
–
–
–
20.041 (0.7890)
19.961 (0.7859)
0.08 (0.003)
6.0 (0.24)
34.7697
(1.36888)
34.9027
(1.37412)
0.04 (0.002)
41.927 (1.6507)
4.965 (0.1955)
4.955 (0.1951)
5.04 (0.198)
0.075 (0.0030)
0.085 (0.0033)
–
–
1.5 (0.06)
1.9 (0.07)
48.1 (1.89)
0.10 (0.004)
42.027 (1.6546)
0.10 (0.004)
REMARKS
10-3