Well, Scotty, the Yellow Naped Amazon has a life expectancy of 50 to 60 years, so Kokomo is only middle aged. He is young enough to train for just about anything that you would want. Have you done any training at all with Kokomo?
I have a female Yellow Naped Amazon, she is 14 yrs. old, flighted and her cage door is open all of the time. She also does not come out of her cage unless I bring her out. So how much time out of his cage do you think that Kokomo actually gets? Do you take him out and play with him? Does he walk about much or does he just sit on a perch? How much time does he spend just hanging out with you?
I know I am asking a lot of questions but I am trying to get a picture of what Kokomo knows and what his physical condition is. There is no sense for me to suggest that you start training him at a point that he is already proficient at. I am also trying to assess the relationship that exists with you and Kokomo to understand why he has started to bite you. I would also like you to consider letting his wings grow back as being clipped is not healthy for him either physically or psychologically.
I am thinking that we should probably start off with target training. To that end I am posting a link for you to read as it explains the basics of target training.
viewtopic.php?f=11&t=227 If you have any ideas about what you want your friend, Kokomo, to learn let me know. There are all kinds of tricks that he can learn, and there is flight training, and I don't know if Kokomo is talking but Yellow Napes are one of the best talkers in the parrot world.