bs34 oem jet configuration

have a 1980 kz750h1 ltd and am taking off the keh carbs and after I have beat them with a hammer i am isnstalling a set of bs34 mik that i got off ebay that someone started putting a jet kit in and couldn't finish cause they couldnt remove some of the old parts and i am glad cause they stopped without damaging the carbs so my question is I have the stock airbox and exh so what main jets does it need and cause it looks like they tried the china set up so i can't go by asnything on it 
 

Download the manual.  Look up jetting for a similar bike.  In this instance, I'd look up the jetting for the 1982 GPz, since it's closest to yours using BS34 carbs.

www.kzrider.com/filebase-alias/summary/1...ctory-service-manual