What should you before installing a carburetor? Sell the CNS, and get a NT. Unless you have experience with carburetors, you don't need to be fooling with the CNS. Like Gump says..."And that's all I have to say about that."I'm glad i saw this post, i should be installing that exact same carburator on my fist bike build this Saturday and i was wondering what those were for. Thanks Al.Fisherman for the post. Btw what do u mean bout the nut house. What should be done before/after installlation. Or whats wrong with the carb. Thanks.