I'm back on the northern fringes of the English Black Country at the moment. The house where I grew up, and where my parents still live, is on the Wolverhampton Road, about seven miles from Wolverhampton itself. Over the past century or more, the English West Midlands has been home to more bike builders than any other British region, though almost every marque is now defunct. Sunbeam, of Wolverhampton, is just one of those.
The DT90 dirt track model was introduced in 1928 and featured the TT-winning 493cc Model 90 OHV engine, though fitted with single-port head instead of the twin-port on the road racers and road models. The Druid-style girder forks came in for a load of criticism from testers and racers, so for the following year (below) they were swapped for the Webb-type popular with dirt trackers. Wheels are a giddying 28in. MP