Fuel lines

Ok, Next question RRR, how do you make the original gas cap vented?
I'm following this because my charcoal canister is gone and the line is just hanging out in the engine compartment. Lol. Mine is a72 Scamp. Thanks Steve

I simply get a 1/16 drill bit and go right through the under side of the cap. Not the outside, but the under side in such a way as to miss the sealing area, otherwise it will not vent. Just flip it over and look at it. It's pretty obvious where to drill. Done a lot of them like that through the years.