Originally Posted by BarelyAWake
Nothin' to forgive
As most, if not all motorcycles, mopeds, scooters & bikes have that setup - I would say it's most likely to help protect against carb ingesting water and debris, "ram air" being exceptionally rare on any stock vehicle... but that's jus' my guess ofc
If you're curious, there has been some experimentation in reversing the jug to do exactly what yer askin' about
Yup, I think Baird's played around with that set-up more than any of us. He'd be the one to get in touch with. That '39 Colson of his is one cool bike.