The rarer something is, the more value it's going to have. In the case of what constitutes the rarest Harley-Davidson colors, the scope will be limited to those used in the factory by the bike maker ...

Allyn started writing for TopSpeed in 2015, but has been writing on motorcycle and automotive topics since 2008 for outlets such as eHow, USAToday, and subsidiaries of MotorTrend. Formally trained as ...