2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 178Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT INSPECTION Turn the outer race of the crankshaft beari ngs with your fingerThe bearings should turn smoothly and quietlyAlso check that the inner race of the bearing fits tightly in the crankshaftReplace the bearing if the race does not turn smoothly and quietly, or if they fit loosely on the crankshaft
Measure the connecting rod big end side clearance with feeler gaugeSERVICE LIMIT: .60 mm (0.024 in)