You'll find the occasional bike ad shown during specialist shows like Motorbike GP coverage on the likes of Eurosport, but most bike races in the UK are shown on the BBC, who aren't in the habit of accepting commercials! The bike manufacturers don't seem to have found any non-specialised shows that fit their audience profile. Instead they concentrate their marketing spend instead on the motorbike press and point-of-presence ads at races. This presupposes that most bikers are race-heads which, sadly, they appear too be. Cruiser/ tourer/ retro bikers (to use accepted terminology) like myself, don't get advertised to -- but maybe there aren't enough of us to make it worthwhile.