turning slowly by hand it will be a low pitch slow growl, and should also be able to feel it in your finger tips, will feel jerky, where a new bearing feels sliky smooth
98 Polaris XC600 (M10 suspension, Boyesen reeds, SLP clutch kit, SLP can)
95 Jag 440 (daughters sled)
"Speed is expensive, How fast do you want to go?"
"You must be fast, cause when I passed you I was Haulin @$$!"