New to you,but it is used. Have you checked the air filter? If it is old and dirty it can make it run way to rich. Cheap fix if that's the problem.Also everybody has there preference,but I would not run Champion spark plugs,have not had good luck with them in the past. Now I do not even know what my Victory has in it,but it only has 5K on it.Let us know what you figure out. Oh and does that bike have a cold start on it where you pull a cable out,if so is it adjusted correctly or shut off completely? Just another crazy idea. Good luck.