I have done everything I know to make this thing run right. It idles great, starts easy, runs good to mid range then cuts out and dies at high speed. I replaced fule lines, took apart and cleaned carb and engine and replaced the fuel tank. It acts like its starving for gas. Any ideas?

Cause it is starving for fuel...richen the high speed needle some about 1/8th turn then do a high speed pass if it still cuts out got another 1/8th until that cut out stops.

If I do that its running so rich it wont hardly move. Like I said, its not lean, or over heating. Its just simply running out of fuel totally at high rpm's.

I'd rest both needles to factory settings and retune from there...also by running out of gas do you mean your fuel line to the carb is totally dry? Also just a suggestion not to make you sound dumb or anything but mistakes happen are you sure you didn't mix up the fuel lines when you changed them? Also if you removed the carb check around it for airleaks...any little airleak can cause it to not pull fuel properly. It's probably something simple your just overlooking...we all do it at times...just don't get frustrated at it...

your tanks messed the tube coming from the pipe is your fuel pump if your tank cant hold presser air is escaping and its not pushing fuel to your carb so its it starving for fuel take a look thats could be one reason