I finally installed the Shorai battery in my F800GS....this battery has been sitting on the shelf for a year because of all the stories about failures i keep reading about. Anyhow, this battery definately seems to have more cranking power than the factory battery, and it weighs a whopping 8 lbs. less.
Next on the list is to disconnect and remove the right side brake and caliper assembly. This bike rarely sees any street duties so I really dont need the extra weight. I had already converted the spaghettifront brake line factory design into a simple MX style brake lines soon after I bought the bike new.