Amazon has the Garmin Zumo 450 Portable GPS Motorcycle Navigator for $399.99. This item ships for FREE with Super Saver Shipping. Next lowest price I saw was for $470.

Technical DetailsSupports optional FM TMC traffic alertsPreloaded maps for all of North AmericaLook up addresses and points of interestChoose 2D or 3D mapsUpload custom POIs, including alerts for speed zones and safety cameras
Manufacturer Description
Born to ride, the Garmin zumo 450 brings all ...