Originally Posted by gspman
AAAAHHHH.. I see
So that is primarily for natuarlly aspirated machines.
Thanks for the explanation
Actually - no!
All tanks are vented in some way or another. If they were not vented
the vaccume would prevent the fuel from freely flowing out of the tank
Many Atv & dirt bikes have a vented cap with the vent line running into
the frame so if gas were to come out it wouldn't get on the paint / plastics.
Some people replace their long vent lines with a shorter one and a ball valve on the
end so air will be allowed to enter the tank, but water, dirt are kept out.
Newer technology has the tanks venter elsewhere, but that are vented....................