Bang for the buck is NOS though. I've been taling to a guy I know who deals in Zex and he said I can spray a bike with two carbs for about $400 on a wet system. problem is stock pistons won't take it, so you're still looking at an overbore and a set of pistons.

An ATP turbo kit was made for the stock engines (I've got one, but not for sale). If you could find one it'd run you about $1k and on a bone stock motor it would be faster than even a really nice 836.