Undersize bearing (0.25 mm (0.0098 in.))

0.25 mm (0.0098 in.) undersize bearing is available, in five kinds varying in thickness.

To distinguish them, each bearing is painted in following colors at such position as indicated in the figure.

Each color represents the following thickness at the center of bearing.

If necessary, regrind crankshaft journal and select undersize bearing to use with it as follows.

Undersize main bearing thickness 

Fig 1: Undersize Main Bearing Thickness Chart

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Locating Main Bearing Paint Mark

Courtesy of SUZUKI OF AMERICA CORP.

1. Regrind journal to the following finished diameter.

   Finished journal diameter 

   Finished journal diameter:  64.738 - 64.756 mm (2.5487 - 2.5494 in.)

2. Using micrometer, measure reground journal diameter.

   Measurement should be taken in two directions perpendicular to each other in order to check for out-of-round.

   Fig 3: Measuring Reground Journal Diameter

   Courtesy of SUZUKI OF AMERICA CORP.
3. Using journal diameter measured above and alphabets stamped on lower crankcase, select an undersize bearing referring to table given below.

   Check bearing clearance with newly selected undersize bearing.

   Undersize bearing specifications 

   Fig 4: New Undersize Main Bearing Specifications Table

   Courtesy of SUZUKI OF AMERICA CORP.