Read Cages?
There was a time when many of the smaller two strokes had minimal reed surface area and better designed reeds added HP. For most engine owners those days are history. However, if you experiment with a small two stroke bike where you can acurately gauge power output, different reeds or reeds and cages can change power characteristics to better suit your riding style or racing venue.
On a sled with that big old variable drive transmission in various states of repair and function, the subtle changes of changing reeds is quite often masked by the forgiving constantly adjusting clutches. On your last carbed sled when you changed reeds it either helped your bad jetting or screwed up your good jetting. So with EFI.........what? You gotta box and computer science degree you might get her back to stock.
And I concur with someone above.........BOYSEENS with their mainifold on bikes will improve the bottom end, and V-Forece reeds come in a box.