10-12-2012, 06:42 PM
No.. the OEM system vented from the stock gas cap, this modded tank only needs 1 check valve and a extended tube relocated to the top of the tank. When the bike is in a wheelie or on the normal riding position it vents and when the bike is in a stoppie gravity keeps the gas from coming up the vent tube. The second the bike is back to a normal position is will vent again



