After traveling about 30-miles at 40-55 mph I happened to feel the hub on my final drive, where the oil reservoir is. It was very hot, too hot to keep my hand on it. I was riding with a friend who was on a Gold Wing and we felt his, and it was just slightly warm. I checked the oil level and it was good. I changed the final drive oil just to be safe and re-checked it after another ride, and the hub was still very hot. Is this normal/common with the NT? Thanks for any input!!!