Suzuki RA410 Manual page 332

1. Gaging plastic
2. Scale
1
5) Remove lower crankcase and using scale on gaging plastic en-
velope, measure gaging plastic width at its widest point. If clear-
ance exceeds its limit, replace bearing. Always replace both
upper and lower inserts as a unit.
New bearings should produce proper clearance.
After selecting new bearings, recheck clearance.
Bearing clearance
Selection of main bearings
If bearing is in malcondition, or bearing clearance is out of specifi-
cation, select a new bearing according to following procedure and
install it.
1) First check journal diameter by using following procedure.
As shown in the figure, crank web (1) of No. 2 cylinder has five
stamped numerals.
Three kinds of numerals ("1", "2" and "3") represent following
journal diameters.
Numeral stamped
1
2
3
The first, second, third, fourth and fifth (left to right) stamped nu-
merals represent journal diameters respectively as shown in
the figure.
For example, in the figure, the first (uppermost) numeral "1" indi-
cates that corresponding (leftmost (crank shaft pulley side), in
this case) journal dia. is within 44.994 – 45.000 mm.
ENGINE MECHANICAL 6A4-73
Standard
0.014 – 0.034 mm
(0.0006 – 0.0013 in.)
Journal diameter
44.994 – 45.000 mm
(1.7714 – 1.7717 in.)
44.988 – 44.994 mm
(1.7712 – 1.7714 in.)
44.982 – 44.988 mm
(1.7709 – 1.7712 in.)
Limit
0.059 mm
(0.0023 in.)