Mel and I always do our anual pilgrimage to Brands for the BSB. We sit on Graham Hill Bend (the left after Druids, about 1:30min into the clip) and you can always tell when one of the 675s go past, they sound ace
theres practically a single make race series for any sportsbike these days across the different race organizers. im not sure if the 675's run at bsb level but with new era as 1 of the mechanics at k&m runs in the series mike