To carb or not to carb

Hello once again I plead for advice..I have my 1045cc installed in my 76 900 with the help of a 1000cc block, new valves, guides, seals through out the motor. I went up from 115 mains to 122.5. The bike seems to run hard. My question is can I benefit from putting a set of 34mm flatslides on? I fear if I bought them I would have too much carb on the bike. Also what if any mods would have to be done to get them to fit the 76 head? Thanks guys!

if they are jetted correctly you cant have too much carb

start with professional porting post.