Walt is correct, the connector is under the seat, left side. I added the the shift assist to a 2009 1300S, takes about 13 minutes and 1 can of beer (duration can be lengthened as installer sees fit). Then break out your patience as you will head to a dealer where they have to connect to the mothership and get the ECU to accept the shifter. Make sure they order the "code" to activate it. The code is good for 48 hours once bought (73 US pennies if I recall correct) so schedule with dealer, drop bike, and go do something else, maybe for a day or two. Took the Seattle dealer a couple days. Not a common practice for technicians so don't give them a hard time about how long it takes. The shift assit works excellent and worth the wait for programming. I bought the shifter and installed myself thinking it was more involved, but just have the dealer install it as they will have plenty of time to loiter while trying to get the bike to talk to BMW. Per Walt- Good Luck!
Just a thought- If your shifting is crap below 8K right now I'm not certain a shift assist is going to be your end all fix, but if you do get all rpm shifting rolling smooth then you'll love the shift assist.
Just a thought- If your shifting is crap below 8K right now I'm not certain a shift assist is going to be your end all fix, but if you do get all rpm shifting rolling smooth then you'll love the shift assist.