2003 KX65 will not idle

I bought an 03 kx65 and rebuilt the engine, top to bottom, tore apart and cleaned the carbs, and installed a new float valve. This thing will not stay running with out the choke on. I have played with the idle screw a lot and can't figure this thing out. If I left any info out let me know and post it. Any ideas? Thanks in advance.  

Do some jetting work. If it has an after market pipe (like and FMF or PC) than it may need rejecting. Reeds also may be the case as well.

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