I don't question your math at all. I built hot rods for the street for years, and people told me I should run a crossover after my headers, and I never did. I can't argue because I have never tried it both ways, so I take your word for it. I do know that the goat's belly had to go either way because I just hated the 4-wheeler exhaust note. I didn't ride it much at all before I got rid of the GB and put on the new pipes so I really shouldn't have an opinion. Thanks for the info, and again, I do not question your math.
Kawasaki introduced the 750 cc class Vulcan worldwide in 1985. Due to tariff restrictions in the United States on bikes over 700 cc imported from Japan, the initial US spec model was limited to 699 cc. The tariff was lifted in 1986 and the Vulcan went to 749cc.