why don't you just connect your rear signals to your rear connections? You have two options to slow down your blink rate, buy a new flasher with a lower amp setting, or install some resistors in the circuit. However, if your still having the problems you talked about in your first post, a new flasher isn't going to do anything for you until you get the other problems fixed.
Running LED's front and rear could lead to you not pulling enough current to get your current flasher working, which btw, is located under the main rider seat. I think your best bet would be to go to a local electronics store and find some 20 watt, 5 ohm resistors. These are what came with my LED brake kit so I'm assuming they'll work for you. you'll need two of them, one for the left and one for the right side. Install them between the positive signal lead and the ground wire. They should draw enough current to get your stock flasher working correctly again. make sure when you splice them in though that you put them somewhere they won't hurt anything, cuz they're gonna get hot, like possibly bubble paint hot, so tuck them away somewhere safe, and if possible in some airflow.
Blue 04 R6. - Sold