Honda SH300 2006 Manual page 307

Measure and record the crankcase main journal I.D.
at between the main journal groove and crankcase
outer side end, and 90 degrees to the index mark.
SERVICE LIMIT: 45.060 mm (1.7740 in)
Depending upon the results of the above measure-
ments there are four possible scenarios for main
bearing selection:
• Crankshaft and crankcase are replaced
• Crankcase only is replaced
• Crankshaft only is replaced
• Main bearings only are replaced
Carefully refer to the following instructions and
tables for main bearing selection.
Record the bearing support I.D. code letter.
• Letters A or B on each crankcase is the code for
the crankcase I.D.
Record the main journal O.D. code number.
• Letters 1, 2 or 3 on each crank weight is the code
for crankshaft journal O.D.
Cross-reference the crankshaft and crankcase codes
to determine the replacement bearing color.
CRANKCASE/CRANKSHAFT
90°
BEARING SUPPORT I.D. CODE LETTER
MAIN JOURNAL O.D. CODE NUMBERS
INSIDE
OUTSIDE
14-11