1999-2002 TRX400EX Fourtrax Service Manual, Page 187Get this manual
REAR WHEELSUSPENSION Turn the inner race of each bearing with your fingerThe bearings should turn smoothly and quietlyAlso check that the bearing outer race fits tightly in the holderBEARING
Repklce the axle bearings in
Remove and discard the bearings if the races do not turn smoothly and quietly or if they fit loosely in the holder