Also I know stewart has dyno tested the s**t out of the different reeds. perhaps he could give you some numbers. [/quote]
Thats what I thought... It's apparently about the reed petal tip area...
I used to have a Boysen. There is something to be said for the long life of the billet intake they have and would kinda be cool for Boysen to make that intake for the big 41-44mm carbs. The Boysen, I had, came with my purchase of the bike, so no way for me to know what stock ones are like. I read about Stewart testing all of the reeds. Testing with a dyno, not trying to guess at anything. His findings on the Vforce impressed him. He said "the "RAD" valve must stand for Release At Dumpster, because its the only safe place for it." That info kinda stuck with me. The man of few words had some good ones there.
I did question the plastic construction, and if it would stand up to race gas. It does. Cutting the tabs off flush on a brand new intake boot was more sketchy than any of it. Hopefully the V3i will continue to be developed. The "i" stands for Intake. They have an intake kinda like the Boysen design. I think they are only available for new Yamahas and Suzukis.
Vforce II's helped my bike's tuneability. When you change a carb setting, you can tell. 8 bikes in the shop, 8 sets of Vforce, v2 or v3, in them. They work well....