I don't know. I would think that all the time and effort spent cleaning and replacing the bearings, possibly chain and gears, you will be ahead by using it for a core replacement and getting a different one.
Son, you've insulted one of the most well-liked and respected members on this site. Instead of responding at your level he replied in a very classy manner and you doubled down on your stupidity. If I were you (thank God I'm not) I would just delete my account and disappear into the webiverse...