I recently bought a 2017 TW with 500 miles on it. The previous owner had just changed the oil (and I believe he did). I then road the bike in half hour increments and put on another 250 miles. The bike seemed to run great no smoke ... no problems at all. Yesterday while trying to learn how to wheelie the bike I felt it loosing power, so I checked the oil level and saw no oil in the window. . I then proceeded to add 3/4 of a quart of oil. My question is, does the TW burn oil on a regular basis or is something wrong with this bike? After adding the oil, it started up and sounded good, but I did not ride it. Any advice would be greatly appreciated.