Got one my gs.
Typed by Tittytalk
No idea, sorry. It was on it when I bought it.
It IS quicker than my previous 2005 1200GS, but then this one has been decatted.

stu1969 - all your questions answered HERE![]()
Yes..many many pages of info here..
BTW. i haven't fitted one to my 2013 TC GSA, as the fueling and performance is spot-on.
Did you run one of these on a pre TC GS? I ask as if you did then your experience is useful.
Yes, I had the AC Mod on my 09 GSA for 30k miles.
Combined with Remus headers and Akra can, it really did improve fueling performance, especially low speed stuff.
I recommended fitting one to any pre TC 1200.
But like I said, I've not installed one on my TC, as the stock fueling is excellent.
Thanks for your feedback. I think I will leave mine alone. I know it runs well. I was just a bit worried it might be running lean.