As stated by larry float level is HUGE,its like sucking through a straw in a full glass or half in/out.First order is check float hieght,Second is put the 340s back in there thats not your problem,27.5 pilot,needle 4th clip.You have done too many changes too not see any results especially since i have tuned many t-5 setups on ported bikes your in the ball park.I would start looking at electrical issues,Ohm out your plug caps,check pickup gap,check harness for nicks and check ground for continuity,pm me if you need to talk it thriugh