I was at HardRock last weekend as well. However no one said anything to me about not being able to ride the main track. I myself had never even been to a real MX track before and I was running my Sizuki LT-Z400 quad on the main track in the afternoon. Granted I rolled the doubles and there was no chance in hell that I would even attempt the water tower jump but it was ceartainly a blast to ride. At first I thought maybe I shouldn't ride it but I saw plenty of people on it that were just putting around so I went for it. So if you get a chance give it a shot.