i suspect the solution will be different for everyone, keepshoveling. but i'm in your position after several years of messing around with this sort of thing. if ktm/husqvarna resurrected the FE570 with suitable mods i think they'd make a killing in this category of riding. out of all the current big bore thumper dirt bikes, i think the beta RR480 or RS500 could be the ticket and aiming to get my grubby little mitts on it for my next project hopefully. :) also, since this thread never seems to die i thought i'd make a vid out of the original post... .