The problem that drove crazy was that the engine was surging at any carb setting, I may be wrong but that means fuel or air leak, I knew wasn't fuel so what the other option?

I don't want you agree with me, but I expect to have top quality on any product I buy; you may think diferent but my hard earn dollar is top quality so I expect to get a top quality product, and you can argue all you want, but like I said on my first post, this was my Thunder Tiger expirience.