i just purchesed a after market 2" speedo for my sportster and it came with no directions. mabye i am slow or its missing something by the front tire because i can't figure out for the life of me how to hook this thing up. and whats the little black wire on the back of the speedo for, don't you need a positive and a neg.? here are some pics that might help
http://s35.photobucket.com/albums/d1...ster%20speedo/