i have been buying everything to peice together a yfz qaud, just to have a second yfz. but i got a good deal on a yz426 and want to build it up to get alot of power out of it. does anyone know what the max i can have the crank stroked to. and whats the furthest i can bore it, it will also get a good port job and whatever else i can do. i just cant have these built hondas and yamahas beating me and i mostly ride in sand.