Took my bike out ten days ago on a beautiful Friday afternoon in North Texas and had my rear wheel fishtail out on me entering a curve. I was able to upright the bike but crossed the opposing traffic lane and went off off the road. I was happy to make it down into the grassy shoulder gully still under control when the front wheel dug into some soft dirt and flipped the bike. Here is where I hope someone can help me understand what might have happened. The road condiitons were great and there was no visible dirt or sand on the road. I came off the front brake a second before entering the turn and off the rear brake as I began to lean the bike into the turn. I was going at an appropriate speed heading into the turn. I have done that previously with no problems. I have had the rear wheel of my 2010 Road King Classic skid out on me on turns on 3 previous occasions, all on good road conditions. Once when downshifting after entering the turn. It was not a bad or crazy downshift, just to get the bike in the right gear to pick up speed exiting the turn. Two other times for no apparent reason, no excessive speed, no braking, etc. My rear tire only has 4,500 miles on it and the tread looks fine. I realize that this is probably due to my lack of experience, I have only been riding for one year and previously 30 years ago. I feel stupid but very lucky to have not gotten injured. The bike had extensive damage from rolling over and will get fixed. I am fine and anxious to get back on the bike. Any suggestions of what I might be doing wrong? I know not to brake in a curve, I did not know that coming off the rear brake entering a curve might be a hazard. I guess it is???