1981-1984 Official Honda ATC250R Shop Manual, Page 94Get this manual
K ICKST ARTE RTRANSM ISS IONCRANKSHAFT
ATe 250R
CRANKSHAFT INSPECTION
Measure the connecting rod big end side clearance with feeler gauge
SERVICE LIMIT:
0.85 mm (0.033 in)
Measure the connecting rod big end radial clearance at two points in the and directions