Undersize Bearings

Bearings are available in .010" (.25 mm) undersize. Undersize bearing thickness is determined by 2 color marks on bearing shell. See Fig 2. Five bearing sizes are available. See COLOR CODE FOR UNDERSIZE BEARINGS table.
Regrind journal to finished diameters, 2.2729-2.2736" (57.732-57.750 mm). Use journal diameter and letters stamped on lower crankcase to select an undersize bearing. See UNDERSIZE BEARING APPLICATION table.
To install, fit proper main bearings to block. Install "O" ring to block. Fit thrust bearings to block between No. 2 and No. 3 cylinders.

Place crankshaft in block. Apply sealant to lower crankcase mating surface. Install lower crankcase to cylinder block. Tighten bolts in sequence. See Fig 3. Tighten bolts to specification. See TORQUE SPECIFICATIONS .

Fig 1: Identifying Main Bearing Color Codes (Standard Bearing)

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Identifying Main Bearing Color Codes (Undersize Bearing)

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COLOR CODE FOR UNDERSIZE BEARINGS

Paint Color	Bearing Thickness - In. (mm)
Green & Red	.0834-.0835 (2.118-2.121)
Black & Red	.0835-.0836 (2.121-2.123)
Red	.0836-.0837 (2.123-2.126)
Yellow & Red	.0837-.0838 (2.126-2.129)
Blue & Red	.0838-.0839 (2.129-2.131)

UNDERSIZE JOURNAL BEARING APPLICATION

Letter Stamped On Lower Crankcase	2.2734-2.2736 (57.744-57.750) Diameter Bearing Color	2.2731-2.2733 (57.737-57.742) Diameter Bearing Color	2.2729-2.2731 (57.732-57.737) Diameter Bearing Color
A	Green & Black	Black & Red	Red
B	Black & Red	Red	Yellow & Red
C	Red	Yellow & Red	Blue & Red

Fig 3: Lower Crankcase Tightening Sequence

Courtesy of SUZUKI OF AMERICA CORP.