Vance and Hines is trying to get CARB approval for this system, and letting the customer adjust it blindly is not what CARB wants.
As it has ben told to me by Scott, the cells are RPM vs Throttle position (In it's basic form) so to adjust it right, they need to know what it's doing.
i did this by having a basic two run dynoing done on mine, it showed a good full throttle run., but a lean part on part throttle.
It is best to ask the dyno tech to record temperature of the engine and the amount of throttle the Issue was found at.
With this, the Nice people at V&H sent me a custom fuel map for my bike.
The bike is running the best it ever.

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I'm Just Sayin'...
2007 FLHT 96 CID W/IDS drive
K&N Air filter system
Vance & Hines Pro Pipe BP & FuelPak.
GMR Roller rockers.
Crane adjustable pushrods.
93.25 Torque 78.74 HP
Member DooF Clenas , and proud of it.
Professional Rockat Surgen
Disclaimer.
I do not work for Vance and Hines, I just like there stuff. Any suggestions I make are to be use at your own risk.