In Brazil, Sertão is the desiccated, rocky section of dirt-poor badlands just inland from the relatively lush northern coastline where most residents, animate or inanimate, project varying degrees of menace. At BMW, it's the tag distancing this latest, most adventurous G650GS from its relatively tedious, entry-level brother. Call it credibility by association. Both bikes rise from the same basic steel frame, and share the same Chinese-built 652cc four-valve single and bin of supporting hardware. But Sertao also means more suspension travel, ground clearance, engine armor and seat height, dirt-worthy wire-spoke wheels with a proper 21-inch front hoop, along with standard plastic handguards and a bigger windscreen.