My dealership told me that I need to bring my bike in around 600 miles for its first service. They told me they would change the oil, check the fluids, adjust the valves, tighten bolts that loosen during the break in period, etc., but I've heard that all they do is an oil change and look over the bike and charge like $250. If that is the case, I'll just change the oil myself. The bike is runninig great. What should I do?