I want to change the niche of my site. It is an adult website and I want to change it to another adult niche. It will target for other keywords than before. Let's say I have a website about celebs nudity and I want to change it to dating or webcam niche. The site has a great authority and earned many valuable backlinks. So will it rank for new keywords, it still ranks for some keywords for the old niche (as I said before it has some great backlinks but I do not control them so I will not change the keywords for it).