Intruders are cold-blooded beasts, so use the choke. Pull the choke all the way out, then hit the starter. Push the choke in a little at a time until you find the point where the bike starts OK.
The choke may be out of adjustment. Ride the bike some more, and when you bring it in for the 600 mile service have the choke adjustment checked.
The choke may be out of adjustment. Ride the bike some more, and when you bring it in for the 600 mile service have the choke adjustment checked.