I think the choke adjustment is very pretty important on these bikes which seem to be known for their cold starting. The K4 which I just finished had that issue. I failed to check it when I rebuilt the carbs and had a terrible time starting it when cold. Took them back off and 2&3 were far off compared to 1&4. I did it the right way and the starting is no longer an issue. On mine I can turn that eye bolt many revolutions as needed to line them up.