It's not a bad job. Take off tank, side panels, drop oil cooler forward & bracket off front cover, cover off. Loosen adj bolt for belt & pivot bolt on LH side. Loosen belt & off, take out the 2 bolts & unplug wiring. Take off out the back.
I have not tried to change bearings on any. You could take it to an auto electric rebuilder for repair.
Note- The RH bolt for adjuster lock is a pain, sits real close to frame and it sometimes is real tight.