Deceased 02/10/2010 - R.I.P.
Ducati Corse
Posts: 3,170
Join Date: Feb 2002
Location: Darlington, Co. Durham
Mood: NGRRC Minitwins champion 2007
Not necessarily std. I think the rules only say that hoses must vent into catch tanks - the catch tank can be anything you want within reason including the airbox as originally designed.
I was wondering if anyone had noticed a change in the fuelling and performance by removing the vent return from the airbox.