How are you getting the prices for the carbon fiber tank you are talking about John as far as an estimate?
The prices are based on materials, and custom labor prices.
I can make an entire set of motorcycle tins from carbon fiber. Sidecovers, tailpieces, gas tanks, and fenders can be made the same way I'd make a custom carbon fiber car hood. Making carbon fiber pieces are like "advanced fiberglass" molding. It's just a matter of time to make a plug, mold the plug, mold the pieces and put them together. If you don't make 50-100 of the same gas tank, then it's going to be more expensive. I do cut a huge price break for anyone on this forum. I am not doing bikes for maximum profit. I do these just to make a fellow KZ rider a little happier as he rides down the freeway. I have seen people quote prices between $600-900 for doing all the body pieces for a single motorcycle. I generally stay within $250-500(and if I am asking for $500, chances are it was in very bad shape, and any other shop would charge $900-1200).
Just thought I would try to help out as much as possible. I don't mind giving away anything labeled as a "trade secret" or any other information that someone is asking for. Just the same, I don't mind giving away my time away from the computer, in the shop, to help out.
btw, if anyone is interested in making their own carbon fiber pieces, I'll give the material supplier I use.