the only way they allow bigger tanks about 125cc is if they make manditory pits every 5 minutes or so. Its either gonna be small tanks or bigger tanks with manditory pits so take your pic. Id rather had the smaller tanks rule so you can pit when you need to not when they say you should. If they do make the manditory pit a rule next year your still gonna have to pit as often as if you were running a smaller tank. Carlton was even saying you MUST add fuel to the tank before you can leave if they make it a rule. Just a FYI for ya.