Im actually dealing with about the same thing right now, I have a W650 and installed the k&s bar end led flashers, I also have the k&s flasher relay they say to use, which is 3 prong with 3 wire on the harness clip and it also came with a seperate wire that can be a bolt down ground wire, my stock harness clip only uses two wires so I have to use the other ground. Without the k&s flasher both bar ends blink in unison at a fast pace, when I put on the k&s flasher and ground it they blink slower at the proper speed but still blink in unison, thats the only issue I have yet to work out. My bike is similar to a newer Bonnie. I dont mean to hijack the thread but I figure we have the same issue basically and would benefit from the same info. So any ideas on how I can get them to blink independantly?