Once it's running and all tricked out, it's still going to be a Sportster. There are a bunch of other crotch rockets that will outperform it, and real Harley riders want a full grown Hog. Back in the dark ages, the 61 cubic inch bike was the granddaddy of the Sportster, and those weren't terribly popular, either.
Jerry
eh, don't dog a sportster. Its a classic look