STG Tracker is one of the most versatile custom workshops in operation today. The Argentine duo of Marcelo Obarrio and Germán Karp works on myriad makes and models, constantly flitting between different build styles. So if you give them carte blanche on a project, you can bet they'll deliver something highly imaginative—like a Royal Enfield bobber with a bespoke frame and a dazzling livery. The Royal Enfield Interceptor 650 is a cracking donor bike for a custom build. It's not crazy expens...
