Checking The Connecting Rod Small End Axial Play; Checking The Connecting Rod Big End Side Clearance; Checking The Crankshaft - Yamaha 250GETO Service Manual

Checking the connecting rod small
end axial play
1. Measure the connecting rod small end
axial play. Replace the bearing and con-
necting rod if above specification.
NOTE:
To measure the axial play, set the dial gauge
at the connecting rod small end and parallel
to the crankshaft.
Connecting rod small end
axial play limit:
2.0 mm (0.08 in)
Checking the connecting rod big
end side clearance
1. Measure the connecting rod big end side
clearance a. Replace the connecting rod
or crankshaft or both if out of specifica-
tion.
a
Connecting rod big end side
clearance a:
0.080–0.400 mm (0.0032–0.0157 in)
6S35H11

Checking the crankshaft

1. Measure the crankshaft journal diameter
a and crankpin diameter b. Replace the
crankshaft if out of specification.
6G450550
a
6G450560
a
b
Crankshaft journal diameter a:
58.975–58.991 mm
(2.3219–2.3225 in)
Crankpin diameter b:
40.485–40.500 mm
(1.5939–1.5945 in)
Crankcase
1
2
3
6G450570
4
5
6G450580
6
7
8
9
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