I have an s40. In warm weather it starts and runs fine in a couple minutes with no choke. In fact I think it dislikes the choke in warm weather like we have had here in california lately. When I do use the choke, the throttle doesn’t seem to help. In fact I’ve stalled the engine opening up the throttle several times with the choke open when I pulled the bike out of half a year of deep sleep. Eventually I just let the bike idle and after it warmed up all was good. I am stil breaking in my bike (and myself) so everything is in new condition. How may miles do you have? Maybe you are ready for a carb adjustment?