Welcome, and I hope I'm not too late with this. In case you haven't already noticed, the fan end of the motor has a sealed ball bearing. As I recall the front bearing caps in the 1205 motors are riveted. If the bearing is noisy or feels rough you'll need to drill out the rivets to gain access to it, then use screws, lock washers, and nuts to re-assemble with your new bearing. Replacements are inexpensive, so I don't clean and re-lube the old bearing.

On the commutator end of the motor is a sleeve bearing with a large felt oil reservoir. Use only a light non-detergent motor oil on it, not grease. I don't remove the sheet metal cap that encloses the felt pad, because it was sealed at the factory to prevent seepage. After cleaning the working surface of the bearing with oily cotton swabs until the swab comes out clean, I add oil to the pad from the inside using an oiler with a long thin tube. The oil will pool on the inside of the cap. You'll see it disappear as it's absorbed into the pad. I stop adding oil when the rate of absorption slows. The pad will absorb quite a bit of oil, but be sure to stop before it won't take any more. I also add a drop of oil to the motor shaft before re-assembly. My personal experience is that if it's kept lubricated, the sleeve bearing will last the life of the motor.

Best of luck with your project! The 1205 is a great vacuum, and I love mine.

Joel