So I've had my GS500 for about 3 weeks now. Having never ridden before this except the Learners course 6 months ago, I have been pretty careful. I took it to my mechanic last week to get a major service done to it to make sure everything on the bike works and is as safe as possible. He alerted me that my back tyre was bold and I should get a new tyre. So I went to pick up the bike yesterday, and it was fully serviced, new fluids and oil, adjusted suspension, new spark plugs, etc. Also got a new front brake lever and the new rear tyre. I thought great. Let's see how it goes. I took it out onto a quiet side street. Everythings great. shifts and power were smooth. Roundabout approaching, no problem, let's turn her around. Three quarters turn later and I was on the floor, bike ahead of me. A car approached and saw me on the floor, two ladies came out and asked me how I was. A guy on the sidewalk helped me pull the bike to the side. The whole experience was rather embarassing. I tried to stand up, a bit sore, but not too bad I thought. Checked bike, things seem to work, except I'll need another brake lever. So took it back to the mechanic and had a chat. He put on another lever for me. Tried the roundabout again to regain some confidence. Much better second time around. So I guess what happened was, I took it around, slowed down too much whilst still leaning, adding in the new tyre, and the down sloping roundabout, meant a lowside was always going to happen. Second time around I was going at the same speed, but in a much more upright position. I don't know how but I managed to hurt the inside of my right knee. Luckily no fractures. Just very swollen. I'll be out of action for 10-14 days according to the doc. Hopefully I learnt something through this experience. Any tips, suggestions or sympathies welcome.