I managed to mangle my rear wheel magnetic sensor and I'm having trouble finding a source for a replacement. Does anyone know where to get one? Do the Terra and the F650GS use the same sensor?
Not the 650 singles, but the part (BMW# 34527715117) does cross reference with numerous other BMW models including the 700/800 twin GS bikes.
I found p/n 7715117 http://www.halls-cycles.com/default.asp?page=xstore&keyword=7715117&submit1=Search
I found you a used one from a S1000RR. FWIW I have bought used parts from Rubber side up, no issues. http://www.rubbersideup.com/servlet/the-36966/2012-2013-BMW-S1000RR/Detail Its interesting that many of the cross over BMW parts are cheaper via Husky than BMW. This sensor is $75 through husky and $113 through BMW.
