nope , it basically like new , ive only tried it twice on my buggy, then sold my buggy and the motor sat in the box for a couple of days then i put it on the crt.5, at first i thought that the shaft or gears broke but was surprised that it was the motor
I swapped out all the bearings in my 2650 and 2200 for ceramics from Boca. The rear cover does come off, but when I did the epoxy pulled off some electrical tape that is wrapped around the wires coming out of the motor. I easily added some new insluation (shoe goo) and off I went.