Topic: Differences In Design - CB550 Airbox vs. CB750 Airbox?

[RickThomas]

I've been working on a new 3D print for a replacement airbox for the CB500/550 for those who are having trouble finding the original. As I have thought about the design, it struck me that the CB750 design is significantly different. The single bread-box of the CB750 is a much simpler design and the boots of the CB750 are shaped as velocity stacks. I started to think about working on a modified CB550 plenum in the fashion of the CB750 airbox.

I was curious if anyone has more direct insight as to why Honda made the decision to design the CB550's airbox in the way they did. I could see how space may be a concern on the CB550 with it's vertical block, but even the difference in carb boots strikes me as an interesting difference.

[bryanj]

Outer carb boots are angled inwards presumably for air flow because of narrower frame

[Bankerdanny]

Since the filter and plenum are separate on the 500/550 but a single unit in the 750 I am not sure how that would work. But anyone that has ever wrestled the 500/550 setup into place would likely be grateful if you could create a version of the 750's easily installed box.