On my six pack set up I use the original stove type choke with the exh crossover blocked. I have the choke spring adjusted (yes, there is an adj screw) to just barely engage when cold. This coupled with the fact that I don't drive it in the winter (much) seems to work OK. I have to tickle the throttle for about 30-60 seconds before it will idle on it's own. Then I stay out of the throttle for the first mile or so and after that it's good to go!