I think I read this around 2000. It was a paperback book, which I'm pretty certain was labeled with "Book 1" of a series, although I only read part of this first one. It was set in a somewhat dystopic United States where the government exerted an oppressive control over the lives of citizens, in particular trying to keep teenagers from acting out or getting too independent. I have a vague memory that rock-and-roll had been banned and was therefore popular as an underground thing.
The more plot-salient part is that the other big outlawed activity was motorcycle racing. There were some special ones that ran faster than the others. I don't think the protagonist owned one, but he ran into one. Early in the book, one explodes; I don't remember if it killed or seriously hurt anyone. The protagonist finds out that other motorcycles of this type were exploding, killing off rebels. The motorcycles use sodium, I think as a cooling agent, but that resulted in explosive results if containment is lost. I think the protagonist found that the government was behind the motorcycles, introducing them and engineering "accidents" to get rid of ringleaders among the rebels.
The title of the book had some play on words on the "United States", but I don't remember exactly how it went.