I agree with xlr8, I have changed bars, seats, carburetion, ignition modules, engines, etc., on almost every bike I have owned. From HD's to Goldwings. But I can tell you one thing: The VTX1300 is the best bike of any of them stock and that is why I don't own any of the others. A 6th gear wouldn't work on it. If you feel you need one it is time for a Goldwing, or to become a cager. It isn't safe to putt putt on the highway without any power.
2005 1300C, Mustang seat, JCW Floorboards, Memphis shades windshield and lowers, Harley Softail mufflers, leather bags, cobra mini-backrest with oem helmet lock added, 1800S handlebars, Motorcycletunes speakers, Peacefulcruisin tank bib with ipod pocket, 140 db 12v horn, vista-cruise.