I say the Government should pass a Law, regulating this.......It is pretty funny that today's "Open Class" bikes have no more power than a Triumph TT of 40 years ago. And that's only by spinning them 13K. All are easy meat powerwise for a CR500 or YZ490 of 25 years ago. And NONE of those bikes needed rebuilding every 20 hours.. or even 200 hours for that matter. If racing is left to manufacturers alone it will be ruined. These fragile $8K MX 4strokes are destroying the offroad sport as we watch.