The mini emtor was cracked..I received a new one, and I need to get the old part off of the vacuum...does it twist off the frame
To replace a mini-emptor it should come of with a twisting motion. You may have to snap it if it is broken, and be aware in the exhaust port a piece may be left behind that you will have to remove to get the new mini-emptor to attach. There are 3 rivets that this part holds onto and when it is removed you should see the rubber and the 3 rivets. You can see pictures here: Kirby G4 miniemptor instructions.
GoodVac.com
www.goodvac.com
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SOURCE: i need to replace power supply. where the cord
Greetings from GoVacuum.com,
Unfortunately there is no fuse on a Kirby Generation model. In my 10 years of repairing Kirby's as well as other vacuums I will tell you that 9 times out of 10, when a Kirby Generation doesn't turn on, it's the cord that needs to be replaced. This is by far the most common problem that we see on Kirby repairs.
The Kirby motor is very well built, and usually has a life of 30+ years (G3 is about 12-15 years now). The only other problem it could be on the Kirby would be carbon brushes, or the switch assembly.
I would first try testing the power cord, I think this will solve the problem for you. To test a cord on a Kirby Generation (all Generation models are the same machines, just different colors) first follow where the cord goes into the Kirby at the bottom. To access this cover easier, first remove the "boot" at the bottom of the outer bag. This is the plastic part at the bottom of the outer bag that connects onto the Kirby. You will see that there is a plastic cover over the cord. You will need to remove the screw that holds this cover on. 
Now after you have removed the cover, pull the plug out of the machine. Once you have the cord disconnected from the machine, you can now test it to see if there is a short somewhere in the cord. You will need to purchase an inexpensive continuity tester from Home Depot, Radio Shack or most other electronic stores. This will tell you if there is power running through the cord, or if the cord is bad. With the continuity tester, plug the cord into the wall outlet, then put the positive, and negative testing rods into the female end of the cord that plugs into the machine. You will then be able to tell if the cord has continuity going through it. The tester will indicate if there's continuity or not. 
The picture here shows that the cord is good. If your tester does not light up, or indicate that there is continuity, you'll simply just need to purchase a new cord. As I stated earlier, this is the most common reason that a Kirby won't turn on.
If however your cord tests OK, this indicates that the machine either needs a new motor (or carbon brushes in the motor) or it needs a new switch.
Chris Jones
SOURCE: I have a kirby G4 and the mini emtor is broke off.
Hello, hrj
I was trying to help you out here. Maybe this will help some? I was going backto some customers that asked questions in the recent past and even fartherback. It appeared that no one answeredsome of them, So, I thought I would take some of my personal time to see if Ican help. Even though this Informational site may not have your exact model orbrand, this site will help you a lot. Here is a site link about everything you want to know about vacuumcleaners and possibly yours, from repair to trouble shooting it. http://home.howstuffworks.com/vacuum-cleaner.htm
Please if this helped you at all, if you can find the time and in your heart torate my help and some kind words written would be appreciated for my free help, I would appreciate it.
Here is also my direct link to my own pages of other areas of my expertise forother problems you might have in Automotive, Appliance, and Electronics. DropIn anytime for my help.
Thanks, Mike
http://beta.fixya.com/users/mc1bean
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Well, since some time had passed with no solution posted...The point at which the emtor connects to the main frame of the vacuum cracked off from the mini emtor. I couldn't find a wrench or tool to assist in twisting the remaining part off the frame. I used a pry bar and hammer to dislodge the remaining plastic coupling. I imagine you could use a small monkey wrench to do the job, but I only had a large wrench that didn't work. By utilizing the pry bar, it cracked in half and I was able to remove it. The new emtor simply half-turned onto the frame and voila, fixed..remember righty tighty and lefty loosy...most times!
Jim, I'm sorry I didn't hear about your problem sooner, I just received notice of it today. I'm glad you managed to figure out a way to get the new emptor onto the neck, however, for future use I'd suggest taking it back off, find your bottle of vaseline and smear a small amount around the inner area of the emptor's neck, making sure to get some on the rubber seal at the front. This should make it about a hundred times easier to put on and take off, if needed in the future. And seeing as how you haven't mentioned it, I have to assume you managed to get the new emptor onto the old bag. I know it's just an elastic opening, but it's quite a strong elastic and sometimes is a struggle for one person to get done. Good luck with this unit.
Just seen your notice today. a bit to late but i thought i would post this
https://www.youtube.com/watch?v=g5hrOipK... hope this helps GOD BLESS
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