Now I don't know all the facts, but there is one privateer who is doing really well on the National circuit, his name is Kyle Regal. He races a CRF450 out of a regular van!
This kid regularly embarrasses the factory guys... at Unadilla he passed his way forward to a 6th place (I was not near the finish line, but that's where I counted him on the last lap)
He passed some pretty big names and made it stick. He also finished 2nd in the second moto in Texas... don't know much about him or his deal, but he is making it happen.
Even on the four-stroke....