Undersize Bearings
- Bearings are available in .010" (.25 mm) undersize. Undersize bearing thickness is determined by color marks on bearing shell. See Figure Five bearing sizes are available. See COLOR CODE FOR UNDERSIZE BEARING table.
- Regrind crankshaft journal to finished diameters 2.5485-2.5492" (64.732-64.750 mm). Use journal finished diameter and letters stamped on lower crankcase, select undersize bearing. See UNDERSIZE JOURNAL BEARING APPLICATION table.
- Install crankshaft. See CRANKSHAFT & MAIN BEARINGS under CYLINDER BLOCK ASSEMBLY.
COLOR CODE FOR UNDERSIZE BEARINGS
| Paint Color | Bearing Thickness - In. (mm) |
|---|---|
| Green & Red | .1031-.1032 (2.619-2.621) |
| Black & Red | .1032-.1033 (2.621-2.624) |
| Red Only | .1033-.1034 (2.624-2.626) |
| Yellow & Red | .1034-.1035 (2.626-2.629) |
| Blue & Red | .1035-.1036 (2.629-2.631) |
UNDERSIZE JOURNAL BEARING APPLICATION
| Letters Stamped On Lower Crankcase | 2.5489-2.5492 (64.742-64.750) Diameter Bearing Color | 2.5487-2.5489 (64.737-64.742) Diameter Bearing Color | 2.5485-2.5487 (64.732-64.737) Diameter Bearing Color |
|---|---|---|---|
| A | Green & Black | Black & Red | Red |
| B | Black & Red | Red | Yellow & Red |
| C | Red | Yellow & Red | Blue & Red |