At that point, you're way better off buying an R6. I've thought of trying to have a rear swingarm made.... Its just not worth it. lolThis topic interests me the most.... That beshlugiduh frame! I wonder how much it would cost to bend a lighter alloy one... like you would find... on any... other bike
Also, I hear carbon fiber tanks can be worth the money for street since they don't break on potholes like CF rims or frames.
The battery is also a big one that's already been mentioned.
Other than that, just the standard stuff like exhaust... that frame tho, that's where the weight is, and it's top heavy weight, too.