Honda CBR125R, Owner'S Manual

Page: 12 / 430

GENERAL INFORMATION
1-8
CYLINDER HEAD/VALVES SPECIFICATIONS
Unit: mm (in)
CYLINDER/PISTON SPECIFICATIONS
Unit: mm (in)
CLUTCH/GEARSHIFT LINKAGE SPECIFICATIONS
Unit: mm (in)
ITEM STANDARD SERVICE LIMIT
Cylinder compression at 530 min
-1
(rpm) 1,343 kPa (13.7 kgf/cm
2
, 195 psi) –
Valve clearance IN 0.06
±
0.02 (0.002
±
0.001) –
EX 0.27
±
0.02 (0.011
±
0.001) –
Valve,
valve guide Valve stem O.D. IN 4.975 – 4.990 (0.1959 – 0.1965) 4.863 (0.1915)
EX 4.965 – 4.980 (0.1955 – 0.1961) 4.853 (0.1911)
Valve guide I.D. IN/EX 5.000 – 5.012 (0.1969 – 0.1973) 5.04 (0.198)
Stem-to-guide
clearance IN 0.010 – 0.037 (0.0004 – 0.0015) 0.065 (0.0026)
EX 0.020 – 0.047 (0.0008 – 0.0019) 0.075 (0.0030)
Valve guide height IN 11.5 – 11.7 (0.45 – 0.46) –
EX 12.3 – 12.5 (0.48 – 0.49) –
Valve seat width IN/EX 0.90 – 1.10 (0.035 – 0.043) 1.50 (0.059)
Valve spring Free length Inner 33.50 (1.319) 31.0 (1.22)
Outer 35.70 (1.406) 34.0 (1.34)
Rocker arm,
rocker arm
shaft Arm I.D. IN/EX 10.000 – 10.015 (0.3937 – 0.3943) 10.10 (0.398)
Shaft O.D. IN/EX 9.972 – 9.987 (0.3926 – 0.3932) 9.75 (0.384)
Arm-to-shaft
clearance
IN/EX 0.013 – 0.043 (0.0005 – 0.0017) 0.10 (0.004)
Camshaft Cam lobe height IN 29.316 – 29.556 (1.1542 – 1.1636) 29.05 (1.144)
EX 29.138 – 29.378 (1.1472 – 1.1566) 28.85 (1.136)
Cylinder head warpage – 0.05 (0.002)
ITEM STANDARD SERVICE LIMIT
Cylinder I.D. 58.000 – 58.010 (2.2835 – 2.2839) 58.05 (2.285)
Out-of-round – 0.010 (0.0004)
Taper – 0.010 (0.0004)
Warpage – 0.05 (0.002)
Piston,
piston pin,
piston ring Piston O.D. at 6.5 (0.26) from bottom 57.970 – 57.990 (2.2823 – 2.2831) 56.67 (2.231)
Piston pin hole I.D. 13.002 – 13.008 (0.5119 – 0.5121) 13.045 (0.5136)
Piston pin O.D. 12.994 – 13.000 (0.5116 – 0.5118) 12.70 (0.500)
Piston-to-piston pin clearance 0.002 – 0.014 (0.0001 – 0.0006) 0.08 (0.003)
Piston ring end gap Top 0.10 – 0.25 (0.004 – 0.010) 0.40 (0.016)
Second 0.35 – 0.50 (0.014 – 0.020) 0.70 (0.028)
Oil (side rail) 0.20 – 0.70 (0.008 – 0.028) 1.10 (0.043)
Piston ring-to-ring
groove clearance Top 0.045 – 0.075 (0.0018 – 0.0030) 0.10 (0.004)
Second 0.015 – 0.050 (0.0006 – 0.0020) 0.09 (0.004)
Cylinder-to-piston clearance 0.010 – 0.040 (0.0004 – 0.0016) 0.09 (0.004)
Connecting rod small end I.D. 13.016 – 13.034 (0.5124 – 0.5131) 13.06 (0.514)
Connecting rod-to-piston pin clearance 0.016 – 0.040 (0.0006 – 0.0016) 0.10 (0.004)
ITEM STANDARD SERVICE LIMIT
Clutch lever freeplay 10 – 20 (3/8 – 13/16) –
Clutch Spring free length 40.0 (1.57) 38.3 (1.51)
Disc thickness 2.92 – 3.08 (0.115 – 0.121) 2.85 (0.112)
Plate warpage – 0.15 (0.006)
Clutch outer I.D. 30.000 – 30.021 (1.1811 – 1.1819) 30.54 (1.202)
Clutch outer guide O.D. 22.959 – 22.980 (0.9039 – 0.9047) 22.93 (0.903)
I.D. 16.991 – 17.009 (0.6689 – 0.6696) 17.04 (0.671)
Mainshaft O.D. at clutch outer guide 16.966 – 16.984 (0.6680 – 0.6687) 16.59 (0.653)