Hello,
I'm very fond of Vorwerks, but when their long lasting motors start to give problems I usually replace the old motor with a new one and keep the old one, unless it is completely burnt out, and give it to a dear friend of mine, a vorwerk repairman, to restore it, and, one by one I put back original motors. avk 116/117 motor might cost between 30 and 50 euros. repairs usually cost more.
I own 20 vk 117, 10 vk 116, and all of them work...I keep in my wharehouse usually 10 new motors for vk 117 and 10 for vk 120, 121, 122. the problem iswith older models, but all of mine work well and have never seen one burnt out.
need spares for VorWerks? look at german or italian ebay.
greetings
tommy