I'd have to argue with that reason for having resonators attached to the ram air tubes. Ever see a race bike with those on? No - that's because they have nothing to do with intake air volume. They are exactly what they're called - resonators. Depending on who you talk to, they're either there to reduce intake noise, or make it louder. Technically, both could be true, as all the resonator will do is enhance or negate sounds at certain frequencies. I seem to remember some Kawasaki press release mentioning something about tuning the intake frequency to help with combustion, but I find that hard to believe as well.