My RK is stock other than catless headers and while it ran well enough it was apparent the mapping is too lean for optimal performance and just for a smooth running engine. There are plenty of remedies out there I chose V&H's FP3, which is made for Harley's later Canbus bikes, and it arrived yesterday. After plugging it in, pairing it to my iPhone it copies and saves the stock tune to V&H's cloud I believe. Then it was just a matter of selecting the V&H map, in my case for a stock motorcycle (airbox, mufflers, etc,), press "download to bike" and it's done. Remove the FP and go for a ride. There was quite a noticeable improvement the engine running smoother and with much better throttle response. There are many other features I won't go into detail on but other maps can be downloaded if you make changes to the bike, there's an autotune feature that optimizes the map to your exact bike while you ride, 4 throttle settings similar to BMW's Road, Rain, Sport.
The FP3 lists for $399 but can be found for $300. http://fp3.vanceandhines.com/#fuelpakfp3
The FP3 lists for $399 but can be found for $300. http://fp3.vanceandhines.com/#fuelpakfp3