I have a Kawasaki KLR 250 (4 stroke) that is easy to ride, fairly quiet, fast, and still looks good. My only problem with it is getting it started in the cold without E start. I ran a rubber tube down to the carb vent, so when i'm ready to start it for the first time, I squirt a few pumps of gas through the tube (from a metal pump oil can).
https://www.amazon.com/Metal-Oil-Can-Flex-Spout-Capacity/dp/B00UGDT3Y0