what kind of bearing a track bearing i doubt you'd hearif you did it would sound like a wraping noise same with a motor bearing it pretty much sounds like metal against metal and may skreach but yeah thats what i know
Bad bearings rumble or growl, if you turn it by hand you can feel it "ratchet". Bad engine bearings sound like a box of rocks in a washing machine; almost unmistakeable. Needle bearings used on con rods rattle when they're going, and might squeak too.
Remove the spark plugs, turn the primary clutch slowly and listen carefully. You will hear the bearings all piling up on each other as they crest the top of the bearing cage. Sounds like marbles clicking together.