What wheels has the first one at the front? The second 3.6 to what? Can't be a quarter surely!! Mad fast tho! First one is an object lesson in not trimming enough fat off a video btw!
I think 3.9 to 136mph is enough said. And the 1st clip shows how far he travelled on the way up in a nice slow run back to the start. Obviously not enough valve content for you.
Having ridden an 800cc one of these I can tell you they accelerate like nothing else Ive have ever been on. Its instant power. Bloody good fun as well in powder snow.