In 1990, the AMA introduced a roadracing class dubbed Supertwins, for Harley-Davidson 883 Sportster models. The class was intended to be an inexpensive avenue for riders to enter professional racing, either from club racing or from flat-track, where the majority of the USA’s roadracing champions started their careers. Race winners in the class included the Bostrom brothers, Aaron Yates and Jake Zemke, all of whom went on to win championships in the AMA’s more traditional classes. Unfortunately, creative interpretation of the rules became rampant and the class ran its course before the end of the decade. Fast forward 20 years, and the AMA is hoping to repeat the successful part of the class with its new Vance & Hines XR1200 class, which became part of the series midway through last year. While a media bike is available for members of the press to race at various rounds in the series, we decided to build and race our own bike, for a more in-depth look at the class. Harley-Davidson lent us an XR1200X model, and we made plans to race it in the Infineon round of the series.