You think it would definately die with the '21 flywheel and HRC card? On race fuel maybe? There is after all a kit part to advance the '21 timing more (30490-NKD-840), and Honda presumably ran that and the SP heads/R cylinders togeather (which Steve did this summer unknowingly anyway on the '21)
If we're going to even come near these 80bhp RGV250 claims we'll need to find this sort of thing out. If it hurts to do so then so be it.
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread