Need help bike died while riding

Everything working perfect. Wednesday night i was riding home from work and got about halfway home bike had a small bog while coming up for a turn onto another street pulled in the clutch and stall. Rolled to a stop and fired the magic button. The motor would turn over and act like it wanted to run (had to give a small amount of throttle) for about 2-3 seconds and then would die. Did this about 5 times and the typical dead or low batter clicking occured. Got the bike home and it has been on the tender for the last 2 days and i just put some time in on the bike and sure enough bike will turn over although kida sputtering and making slight backfire sounds (almost as if timing is off) and will run for about 2-3 seconds and dies. I can do this about 4-5 times and the infamous clicking starts to happen again. Now my bike has never been a cold start bike, i always have to give it a bit of throttle when its cold to keep it running, but once it warms up runs like a champ...or atleast it used to. Its a fairly new battery and has been kept on the tender when the bike is not used for a few days. Now the other thing that bothers me is it seems that oil may be seeping out from where the head and the case meet, but very little. The motor does have a slight coating of oil around the gasket area. I did send the motor to ATK back in late 04 or 05 and had the reliability and upgrade done to it but have only about 500 total miles on it since then, with about 400 of those in the last coulple of months. ,Even with a good bike battery 4-5 tries is about all they have.So forget about the battery and go with basics fuel,compression and spark. Also sounds like you need some mapping help, you should never have to touch the throttle when starting. The will run perfect if they are tuned. Do you know what map is in it? Did ATK also change the ECU to a .atj map?,,,