After reading Ned's post this morning about how much better his 690RR felt in the sand (due to the trellis frame he said), I wondered how hard/expensive it would be to have something similar, i.e. trellis frame, with a Dakar-legal 450cc. It seemed to me there were only two options: 1) Buy a 450RR like Pyndon did, 2) put 450cc engine (like an XC4) in a 690's frame.
Never did it occur to me to convert a 690 engine to 450cc's.
That's why y'all are doing it, and I'm sitting here puttering away at a computer like a monkey.
Can't wait to see how this turns out.