Runner FXR 180 Cold start problems

Hi I’ve read a lot here and I still can’t get really further. I’ve done a Runner FXR 180, Bj 1999 with 7000 km on the clock. Inspections always. Last 2010. After that about 680 km. I wanted to start it at this time of year. Unfortunately without success. First E-Starter……nothing. I didn’t want to empty the battery and then used the Kickstarter. After feeling 20 kicks the Runner reacted. He went on and off again. Again Kick….again and again The intervals, after he went out again, were from time to time longer….until he finally ran. And from then on he ran really well. Roller turned off, 4 hours of walking and pressed E-starter. Again briefly on and immediately again….again E-start….again and again. now the intervals were also longer here until he finally ran. Seems to be too cold to the engine and I tapped on the E Choke. Built out and looked at the top. Engine was cold when the engine was disassembled….the Sp Then I put the choke in the freezer and then the tip was a little bit further in it. Then let it settle at room temperature and the tip came further out, as far as the brass body was completely outside and a small spring appeared behind it. Obviously the choke is fine. I now type on a dirty/resinated carburettor, where the channel for the cold mixing mixture may be clogged. The carburettor is now supposed to be in the Ultr Ashallbad. Do you have any other suggestions? Greetings Michael