http://replayxd.com/cameras/replay-xd-1080-mini/
Looks like they have a lot of accessories for motorcyclists
Hard wire kit
http://replayxd.com/product/hardwire...io-in-4-meter/
Hardwire with remote stop/start buttons and audio in (only works with the larger camera I think)
http://replayxd.com/product/xd1080-h...-stop-4-meter/
External mic for above kit (put it under the rear seat for great sound
http://replayxd.com/product/replay-xd-external-mic/
I may pick one up soon and give it a shot.