My 85 project had the wrong carbs when i bought it, so i found replacements carbs, had them rebuilt and now the bike idles well, and when you choke it will run up to high rpms, but twist the throttle and it instantly dies. Any suggestions? Mixture maybe? Everything is stock.

 

Welcome to KF.

first thoughts, vacuum line loose, boots, cv diaphragm on the newly rebuilt carbs and do a resync. Let us know and good luck.