Get a Sportster. I had one that was an 883 that I had bored out to a 1200, and kept the 883 piston arms (for more torque). Then, I put a decent cam kit in it, and had the engine outfitted with adjustable push rods. For the styling of the bike, I got rid of the standard controls and put in forward controls, put on an extended rear fender, 21 inch chrome spoke on the front, and dropped the shocks from 13 inches to 11. Got rid of the small fuel tank and got a conversion kit so I could put on big twin tanks. Drag bars, a good seat and mini sissy bar finished it out, and it only weighed in at around 425 lbs. And, not only did people have trouble telling it apart from a big twin Harley (they had to look at the engine to figure it out), but it also ran like a scalded cat. One time a friend of mine tried to drop me while we were riding. He had a big twin, and I was on my Sporty with a passenger on the back (110 lbs). Well, we ended up going down the highway at around 110 mph for 10 miles, and when we got to where we were going, he looked at me and said he didn't know what in the hell I was riding, but he damn sure didn't think it was a Sportster. Matter of fact, had the engine so well tuned that I rode from Amarillo TX, over all the various passes in CO for a week, ending with a ride to the top of Pike's Peak and then back to Amarillo. My friend kept looking at me funny all week, and when we got to the top of Pike's Peak, he said in an amazed voice, that my bike hadn't sputtered once on the trip. I said so what? Yours didn't either. He then told me that yeah, his didn't, but that was because he had fuel injection. Apparently, carburated engines aren't supposed to do that.