I met someone with GPS on their handlebars showing their position, the wilderness roads in the area and he could expand out to show the nearby highways. It also showed exactly where he was! I want one! Damn near got lost last year in a maze of logging roads ... Questions: How does the device have these maps in it? Do they cover the whole planet? Are the maps downloaded from the satelite or in the software of the unit? Is there a monthly fee to use GPS? Which GPS should I buy for my WR450? How much are they? Do they mount securely? Also ... how many miles are you all getting out of your stock tires? I have 900 miles on mine and the shop wants to sell me another rear tire although it looks like plenty of meat left to me. Thanks guys, Greg.