Bought a used '95 1100GS about two months ago that had very low miles (about 800!!). The original owner had the bike stored in a garage and took it back to the BMW dealer where it was originally purchased for a consignment sale. The dealer had replaced the battery once and put another new one in. Alledgedly the BMW mechanics flushed the fuel system, checked the oils and grease and generally went through the GS and certified it sound and ready to ride.
I asked about replacing the tires (Metzeler Enduro 4s) due to their age and the dealer said they would be fine. My sport riding buddies said get 'em off, they'll be slick and fall apart. I've ridden the bike about 700 miles and they seem o.k. Keep 'em or switch 'em?