Just got a call from my local bike shop, although it's hard to call Saltires in Edinburgh a local shop anymore. It's massive, full of those essential biker outlets such as.....a hairdressers......a cafe...

Anyway, bike was in for MOT after a long lay off. Seems it failed the horn is not loud enough! & there is an issues on one of the tyre valves. Anybody come across the horn issue? They still have the bike so haven't looked yet. Maybe a Dukes of Hazard air horn set is in order, paint it orange & confederate my ass Perhaps not.

Beep Beep

time to time by B4 tends to refuse to horn at all. unfortunately every time I want to diagnose it the horn works. this might be similar issue. Try to clean the switch as with GSX-R horn should be protected from environment effects.

It was just knackered, sounds like a noddy car