Is that an older 2-stroke KX still mixing it up in the AA class? (Possibly with the #1 plate, I cant quite make it out) Thats awesome. Excellent footage and riding, looks like a very flowy course. Thanks for posting!
Whomever it is is fast enough to keep Nick Swenson and Logan Kittock in view for more than one corner. They're both AA riders. I would say it's a safe bet that the bike he's riding is a YZ450FX.