Crankshaft Runout - Arctic Cat ZR 120 Service Manual

3. If the difference between the connecting rod small
end bore inside diameter and the piston pin outside
diameter exceeds the limit, replace both connect-
ing rod and piston pin. The measurements must be
within 0.0001-0.0002" of each other.

CRANKSHAFT RUNOUT

1. Support the crankshaft using a set of V blocks; use
a dial indicator to read crankshaft runout.

NOTE: The contact point of the dial indicator should
be on the seal area of the crankshaft.
2. Total indicator reading must not exceed 0.0008".
3. If not within specification, either straighten the
crankshaft or replace it.
MEASURING CONNECTING ROD BIG
END SIDE CLEARANCE
1. Check the connecting rod side clearance by using
a thickness gauge. If the clearance exceeds the
limit, replace the connecting rod or crankshaft.
2. Clearance measurement must be within 0.008-
0.024".
GEN-0034
MEASURING CRANK PIN/
CONNECTING ROD CLEARANCE
1. Measure the crank pin diameter. Measurement
must be at least 1.102".
GEN-0035
2. Measure the connecting rod big end bore inside
diameter. Measurement must be within 1.1023-
1.1029".
GEN-0031
3. Measure the crank pin/connecting rod clearance.
Measurement must be within 0.0002-0.0008".
GEN-0036
GEN-0037
GEN-0038
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