SHERCO 2013 SE 250i-R Shop Manual page 32

Checking the crankshaft:
Radial play of the big end bearing:
•
Place the crankshaft in a set of V blocks
and install a dial indicator as shown [A].
•
Push the rod [B] in the direction of the
indicator and then push it in the opposite
direction. The difference between these two
readings is the radial play.
Radial play of the big end bearing:
Standard: 0.015 mm – 0.020 mm
Tolerance limit: 0.06 mm
If the radial play exceeds the tolerance limit the
crankshaft must be replaced.
Lateral movement of the big end:
•
Measure the lateral movement of the big
end [A].
Lateral movement of the big end:
Standard: 0.2 mm - 0.3mm
Tolerance limit: 0.55 mm
If the lateral movement of the big end exceeds
the tolerance the crankshaft must be replaced.
Checking the run out:
•
Place the crankshaft in a lathe or
suitable support, place dial indicators as shown.
•
Turn the crankshaft and record the
readings. The maximum difference between the
readings is the crankshaft run out.
Run out:
Standard: 0.02 mm maximum
Tolerance limit: 0.08 mm
If the run out exceeds the tolerance, replace
the crankshaft or straighten it so that it meets
the tolerance.
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