You'll get the same overall change from stock on a late model FL by swapping the 30T front belt sprocket. I posted the comparison of the math HERE. (looking for the link)
Primo game changer or 30t trans sprocket?
Although it wouldn't address the comp in any way, you can achieve about the same gearing advantage by changing the transmission output (the front belt sprocket) to the 30 tooth that is used on the trikes. I did this on my 2010 and it was a very noticeable improvement, around 10% overall.
You can modify the swing arm a bit (not major) and still run the stock belt. I would highly recommend it.
NOTE: on my 2010, after the 30T trans pulley, the 6th gear light and cruise worked just fine. The only thing askew was the speedo calibration and since I run a Power Vision it was a simple entry to fix.
The math:
Stock ([34/46 pri & 32/68 sec] and in 6th gear 1:1)
................................Overall.........................Approx
--------------------Final Drive ratio------------RPM@ 80mph
Stock sprockets 2.875...........................3062
30T trans sprocket 3.066.......................... 3310
32T comp sprocket 3.055................ ......... 3280
BOTH sprockets 3.258.......................... 3500
EDIT: since this discussion I have decided to go back with the "new SE" compensator 42200064A kit.
Since I already have the 30T pulley, that seemed to be the way to go.