Yamaha XV19SW Service Manual page 316

L LLL L LLL L L LLL L L LLL L
4. Select:
• Big end bearings ("P
1
NOTE:
• The numbers "a" stamped into the crankshaft
web and the numbers "b" on the connecting
rods are used to determine the replacement
big end bearing sizes.
• "P "–"P " refer to the bearings shown in the
1 2
crankshaft illustration.
P
1
L LLL L L LLL L LLL
"–"P ")
2
P
2
a
5-104
For example, if the connecting rod "P
the crankshaft web "P" numbers are "5" and
"2" respectively, then the bearing size for "P
is:
"P " (connecting rod) - "P" (crankshaft)
1
=
5 - 2 = 3 (brown)
Bearing color code
1.Blue 2.Black 3.Brown 4.Green
5.Yellow
5. Measure:
• Crankshaft journal diameter "a"
Out of specification → Replace the crank-
shaft.
NOTE:
Measure the diameter of each crankshaft journal
at two places.
Crankshaft journal diameter
49.968–49.980 mm (1.9672–
1.9677 in)
6. Measure:
• Crankshaft journal bearing inside diameter
"a"
Out of specification → Replace the crank-
case assembly.
NOTE:
Measure the inside diameter of each crankshaft
journal bearing at two places.
Crankshaft journal bearing inside
diameter
50.010–50.030 mm (1.9689–
1.9697 in)
CRANKSHAFT
" and
1
"
1