Honda CBR125R Owner's Manual page 261

SERVICE INFORMATION
GENERAL
• This section covers crankcase separation for service of the crankshaft, transmission and balancer.
• The crankcase must be separated to service the crankshaft, balancer and transmission. To service these parts, the
engine must be removed from the frame.
• The following components must be removed before separating the crankcase.
– Camshaft (page 8-8)
– Cylinder head (page 8-15)
– Cylinder/piston (page 9-4)
– Clutch (page 10-9)
– Gearshift linkage (page 10-15)
– Oil pump (page 4-4)
– Primary drive gear (page 10-20)
– Flywheel (page 11-7)
– Neutral switch (page 19-17)
– Starter motor (page 18-6)
– Engine (page 7-4)
• Be careful not to damage the crankcase mating surfaces when servicing.
• Clean the oil passages before assembling the crankcase halves.
• Prior to assembling the crankcase halves, apply sealant to their mating surfaces. Wipe off excess sealant thoroughly.
SPECIFICATIONS
Crankshaft Runout
Connecting rod big end radial clear-
ance
Connecting rod big end side clearance
Transmission Gear I.D.
Bushing O.D.
Gear-to-bushing
clearance
Bushing I.D.
Mainshaft /
countershaft O.D.
Bushing-to-shaft
clearance
Shift fork, Shift fork shaft O.D.
shift fork shaft
Shift fork I.D.
Shift fork claw thickness
Shift drum Shift drum O.D.
Shift drum journal
I.D.
Shift drum-to-shift
drum journal
clearance
ITEM
M5, M6
C1
C2
C3, C4
M5, M6
C1
C2
M5, M6, C1
C2
M5
C1
C2
at M5 bushing
at C1 bushing
at C2 bushing
M5, C1
C2
Right side
Left side
Right side
Left side
Right side
Left side
CRANKSHAFT/BALANCER/TRANSMISSION
STANDARD
–
0.006 – 0.014 (0.0002 – 0.0006)
0.40 – 0.60 (0.016 – 0.024)
20.000 – 20.021 (0.7874 – 0.7882)
18.000 – 18.021 (0.7087 – 0.7095)
23.020 – 23.041 (0.9063 – 0.9071)
22.020 – 22.041 (0.8669 – 0.8678)
19.959 – 19.980 (0.7858 – 0.7866)
17.959 – 17.980 (0.7070 – 0.7079)
22.984 – 23.005 (0.9049 – 0.9057)
0.020 – 0.062 (0.0008 – 0.0024)
0.015 – 0.057 (0.0006 –0.0022)
17.000 – 17.018 (0.6693 – 0.6700)
15.000 – 15.018 (0.5906 – 0.5913)
20.020 – 20.041 (0.7882 – 0.7890)
16.966 – 16.984 (0.6680 – 0.6687)
14.966 – 14.984 (0.5892 – 0.5899)
19.978 – 19.989 (0.7865 – 0.7870)
0.016 – 0.052 (0.0006 – 0.0020)
0.031 – 0.063 (0.0012 – 0.0025)
9.986 – 9.995 (0.3931 – 0.3935)
10.000 – 10.018 (0.3937 – 0.3944)
4.93 – 5.00 (0.194 – 0.197)
25.959 – 25.980 (1.0220 – 1.0228)
24.959 – 24.980 (0.9826 – 0.9835)
26.000 – 26.021 (1.0236 – 1.0244)
25.000 – 25.033 (0.9843 – 0.9855)
0.020 – 0.062 (0.0008 – 0.0024)
0.020 – 0.074 (0.0008 – 0.0029)
Unit: mm (in)
SERVICE LIMIT
0.03 (0.001)
0.05 (0.002)
0.85 (0.033)
20.05 (0.789)
18.07 (0.711)
23.09 (0.909)
22.10 (0.870)
19.91 (0.784)
17.90 (0.705)
22.47 (0.885)
0.10 (0.004)
0.10 (0.004)
17.04 (0.671)
15.10 (0.594)
20.10 (0.791)
16.93 (0.667)
14.90 (0.587)
19.92 (0.784)
0.10 (0.004)
0.10 (0.004)
9.93 (0.391)
10.03 (0.395)
4.82 (0.190)
25.90 (1.020)
24.90 (0.980)
26.50 (1.043)
25.50 (1.004)
0.07 (0.003)
0.08 (0.003)
12-3