Sideburn Magazine Issue 53Considering the XR750 is arguably the most significant dirt track bike of all time, we haven't covered it that many times. We redress the balance with a monster 17 page feature on the very first XR, the 1970 Ironhead. This one built from meticulously acquired parts, in West London. We cover the hunt, the build, and the racing, all written by the owner himself. + Briar Bauman writes exclusively about his beast of a KTM AFT SuperTwin + Interview with