Motorcycle Repair: vibration and bike shutting off, harley davidson nighttrain, bank angle

Question
I have a 2000 Harley Davidson nighttrain, within a month of purchase purchased used with 6,555 miles on it bought from Fort Lauderdale Harley Davidson. The bike will just quit while going down the rode this has gotten increasingly worse All I have to do is turn the key switch off then on and keep going. The bank angle sensor has been changed but this did not cure the problem. Also It has started having a vibration that also has gotten worse started about 1 year ago while on the way to have a new front tire  put on. It seemed to have gotten some better but now is worse than ever. It vibrates when in throttle while pulling clutch and letting off throttle it does not vibrate. I have had it looked at without success. Thanks Joe

Answer
To find the shutting off problem you will need a test light. Go for a ride and let the bike shut off. Do not turn the key off. With the test light touch the prongs on the coil. Do you have juice on the hot side? If not then you have a short. Check the key switch to see if you have power to the ignition and power to the key switch from the battery.Let me know what you find.
As to the vibration. Are you saying when you ride and you are giving it gas it vibrates? When you run it up to around 60 MPH and pull in the clutch, does it vibrate?
Mike