I'm assuming you don't have a 2014+ 1000 since they use LED. On my 2013 650 I'm pretty sure you just remove the seat and reach back in there and twist the socket about 1/4 turn to remove it from the tail light assembly.
Well, duh, just realized this is the 2014+ forum. Shouldn't be the lamps since they're LED, maybe a loose connector somewhere? There are some under the seat area. Have you had the recall work done? Long shot, but maybe the wiring that's rubbing the tank includes the brake light wiring.
2014 V-Strom 1000 - Desert Khaki
2011 Burgman 400
2007 Honda Helix
2013 V-Strom 650 - sold
Last edited by G-Dub; 06-22-2016 at 11:44 PM.