Why isn't there a IROC type of race for motocross?
I saw an old IROC Z today and wondered why didn't they ever do that for motocross? Where all the bikes would be exactly the same. The last pro racer I know that ran a bone stock bike was Bob Hannah. It would be interesting to see the lap times of the top pro's on a bone stock bike. They could allow modifications as long as every other bike had the exact same mod. Does anyone know why it was never done?