If the bike starts up and ticks over OK but only dies when you put it in gear and let clutch out. The kawasaki range of VN have two cut out switches one on the side stand and one on the clutch lever.
First check the one on the sideside, spray with DW40 or similar and manually pull and push it in and out until free. Start the bike and try again. If it still stalls the problem is with the one on the clutch. To test it pull the connector block off and place a piece of jumper cable between the block connectors. This by passes the switch. Try again and see if there is a problem. These are the two main faults with pulling away on the VN.
Druid (VN 800), March 2011