i have a over sized gas tank on my yz426. the after market gas cap had(yes had) a seal with a rubber Diaphragm breather in the middle. now the Diaphragm has ripped off and fell in the tank. got it out and was looking at the stock tank i still have. the stock cap goes on and seem to seal. just want to know if that s ok since it has a diffrent breather set up?