I just got my FTR S and ordered an Optima 4 to take care of the battery. For those of you who own the same unit, are you changing the program over to CAN-bus and charging through the SAE connector on the bike?
What happens on the BMW is when you use a regular charger the connector will "close" after a while, so the battery stops charging. The canbus aware charger send a signal to the bike to keep the circuit open. An FTR doesn't need that.