Thailand's K-Speed is a house of many talents. But there's one particular trick that they excel at, and that's turning small-capacity motorcycles into custom machines with big attitudes. So we're not the least bit surprised to see them apply their signature style to the freshly minted Triumph Scrambler 400 X and Speed 400. Created in collaboration with the massive Indian marque Bajaj, Triumph's new 398 cc singles exist to offer potential customers a lower point of entry into the brand…