Took off the carbs from my ,83 GPPZ750 and put them to one side. Took a spare set i had off an ´84GPZ750, cleaned, put together and back on the bike.Air box off. Took it for a run, idles well and great up to 4000rpm, then just starves for fuel. Choke out and it works great, choke off and it dies, down to 4000rpm again. So I thought, \