Quote:


I dd not see a Stage 2 kit for Americas and Speedmasters. Odd.



Tune 1 looks like it would apply to your situation.
Of course the Breathe intake has been proven (by his on research) to flow better or with less turbulent air flow than no snorkel at the air box inlet.
Or are you referring to further air box mods such as removal of the internal baffle wall? Then tune 5 maybe?

https://www.triumphtwinpower.com/america-speedmaster-efi-tunes.php

09 America, some modifications