I'd do a stock bore stock stroke motor build with a 6-8inch arm and put struts and a bar on it and boom your done. Then take the bar off and put the shocks back on for duning.
I know it doesn't matter but I'm curious what horsepower that setup makes?A Raptor 700, lowering kit, stock arms,*brand new* outsu 501(stock 2001 400ex rear)tires, msd programmer, 15t front sprocket, 12.5:1 CP piston, stg 3 hot cam, my mild port head, duals and a K&N filter kit. That setup runs low 5's in dirt 300' consistently on more than 6 different bike's. That's more than plenty to beat you average weekend warriors and it will be just as reliable.