Hi there,
Brad and the other track owners have the only real answer to that question but it appears that there will be a light and a heavy Tag 4 stroke next year, I’m banking on it. I just got my new kart and am picking up my Vampire this week. Even if you’re under weight that’s a great place to be. You can bolt weight on where you want it to balance the kart. Good luck and hope to race with you next year!!