[veldthui]

Its a well know problem. assuming prompts are switched on etc., with bike running and nav on, press the mute on the screen then unmute.. This satnav has the same problem as the NUVI. when you switch the bike off the satnav is put in sleep mode instead of off to enable quick start up. problem is it kills the sound

You need the mute/unmute on the wonder wheel to get the voice prompts. Heaps of threads about it around here.