1987 Honda Fourtrax TRX 250X Service Manual, Page 129Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT Measure the connecting rod radial clearance at two points in
the directions indicated by the arrowsSERVICE LIMIT: 0.05 mm (0.002 in)
Set the crankshaft on stand or V-blocks and read the runout using dial indicatorsSERVICE LIMIT: 0.05 mm (0.002 in)
6.0 mm (0.24 in)
11.0 mm 10.43 inl
CRANKCASE BEARING REPLACEMENT
INSPECTION
Turn the inner race of each bearing with your finger The bearings should turn smoothly and quietlyAlso check that the bearing outer race fits ightly in the crankcase