Honda CB900F Service Manual page 268

12. CRANKSHAFT/TRANSMISSION
SERVICE INFORMATION
TROUBLESHOOTING
SERVICE INFORMATION
GENERAL
12-1
12-2
CRANKSHAFT
TRANSMISSION
12-3
12-9
The crankcase must be separated to service the crankshaft and transmission . Refer to section 11 for crankcase
separation/assembly.
Be careful not to damage the crankshaft main journal bearing while removing or installing the crankshaft.
Mark and store the disassembled parts to ensure that they are installed in the ir or iginal locations.
Mark and store the bearing inserts to ensure that the parts are in their correct locations during reassembly. If the inserts
are improperly installed, they wil block the oil hole, causing insufficient lubrication and eventual engine seizure .
The main journal bearing inserts are a select fit and are identified by color codes . Select replacement bearings from the
code tables. After installing new bearings, recheck them with a plastigauge to verify clearance. Apply molybdenum disul -
fide oil to the main journal during assembly.
SPECIFICATIONS
Unit: mm (in)
ITEM
STANDARD SERVICE LIMIT
Crankshaft
Side clearance
0.05 - 0.20 (0.002 - 0.008) 0.3010.012)
Runout
- -
0.30 (0.012)
Main jounal oil clearance 0.017 - 0.03510.0007 - 0.00141 0.04 10.0021
Transmission Gear I.D. M5, M6 28.000 - 28 .021 11.1024 - 1.1032) 28 .04 (1.1041
Cl 24 .000 - 24 .021 10.9449 - 0.9547)' 24.04 (0.9461
C2,3,4 31.000 - 31.025 (1.2205 - 1.2215) 31.04 (1.222)
Bushing O.D.
M5,6
27.959 - 27.98011.1007 - 1.10161 27.9411.1001
C2 30.955 - 30 .980 (1.2187 - 1.21971 30 .93 11.218)
C3,4 30 .950 - 30.975 (1.2185 - 1.21951 30.93 11.218)
Bushing I.D. M5 24.985 - 25.006 (0.9837 - 0.9845) 25.02 10.985)
C2 27.985 - 28 .00611.1018 - 1.10261 28.02 11.1031
Gear-to -bushing M5,6
0 .020 - 0.062 (0.0008 - 0.00241 0 .10 (0.0041
clearance
C2 0.020 - 0.070 (0.0008 - 0.00281 0.11 (0.0041
C3,4
0.025 - 0.075 (0.0010 - 0.00301 0.11 (0.0041
Mainshaft O.D. M5 24.967 - 24 .980 (0.9830 - 0 .98351 24 .96 (0.9831
Clutch outer guide
24.980 - 24 .993 (0.9835 - 0.9840)
24 .96 (0.9831
Countershaft a .D.
C2 27.967 - 27.980 (1.1011 - 1.10161 27.96 11.101)
Bushing-lo -shaft
M5
0.005 - 0.03910.0002 - 0.0015)
0.08 (0.0031
clearance
C2 0.005 - 0.039 10.0002 - 0.0015) 0.08 (0.003)
IE
12-1