Note.
- Tighten the crankcase bolts to the specified torque (see Crankcase Assembly).
- Do not turn the crankshaft during clearance measurement.
- Journal clearance less than 0.025 mm can not be measured by plastigage, however, using genuine parts maintains the minimum standard clearance.
Crankshaft Main Bearing Insert/Journal Clearance
Standard: 0.014-0.038 mm
Service Limit: 0.07 mm
★ If clearance is within the standard, no bearing replacement is required.
★ If clearance is between 0.039 mm and the service limit (0.07 mm), replace the bearing inserts with inserts painted blue [С]. Check insert/ journal clearance with the plastigage. The clearance may exceed the standard slightly, but it must not be less than the minimum in order to avoid bearing seizure.
★ If clearance exceeds the service limit, measure the diameter of the crankshaft main journal.
Crankshaft main journal diameter
Standard: 29.984-30.000 mm
Service Limit: 29.96 mm
★ If any journal has worn past the service limit, replace the crankshaft with a new one.
★ If the measured journal diameters are not less than the service limit, but do not coincide with the original diameter markings on the crankshaft, make new marks on it.
Crankshaft main journal diameter marks
None: 29.984-29.994 mm
1: 29.995-30.000 mm
O: Crankshaft Main Journal Diameter Marks, "1" mark or no mark.
Measure the main bearing bore diameter, and mark the upper crankcase half in accordance with the bore diameter.
O: Crankcase Main Bearing Bore Diameter Marks, "O" mark or no mark.
Note.
- Tighten the crankcase bolts to the specified torque (see Crankcase Assembly).
- The mark already on the upper crankcase half should almost coincide with the measurement.
Crankcase main bearing bore diameter marks
O: 33.000-33.008 mm
None: 33.009-33.016 mm
Select the proper bearing insert in accordance with the combination of the crankcase and crankshaft coding.
Install the new inserts in the crankcase halves and check insert/ journal clearance with the plastigage.
| Crankcase Main Bearing Bore Diameter Marking | Crankshaft Main Journal Diameter Marking | Bearing Insert* | ||
| Size Color | Part Number | Journal Nos. | ||
| O | 1 | Brown | 92028-1883 | 3, 5 |
| 92028-1886 | 1, 2, 4 | |||
| None | 1 | Black | 92028-1882 | 3, 5 |
| O | None | 92028-1885 | 1, 2, 4 | |
| None | None | Blue | 92028-1881 | 3, 5 |
| 92028-1884 | 1, 2, 4 | |||
* The bearing inserts for Nos. 1. 2 and 4 journals have an oil groove, respectively.