Mentioned this before, and will again, the scoops for the radiator on each side induce an air mass onto the surface of the radiator, that will definitely have an effect of pushing the side of the bike that gets wind. Take that mass of the rider, and the bike as a whole, with the wheels, and the mass of it all begins to look like a sail. If you get a low pressure on one side of the bike, you'll get pulled that way, similar to lift on an aircraft.
The fork brace on the front end is to minimize tube twist and supposedly toprevent lower leg flex as the movements are telegraphed throught the front end.
All of this then would end in keeping the steering tight. After running an inverted front end VS a stock Sportster front end on my Sportster, the inverted front end wins hands down, as defintely, no flex or twist was found with the inverted front end. There was no need to ad a brace, as the thickness of the tubes that run through the triple trees are designed to eliminate the need.
The brace is meant to do the same, to stiffen thin fork tubes, and resist flex. The V-Rods tubes that run through the triple trees are larger than anything else Harley has produced, so that is to our benifit and I think that has minimized the fork flex problem.
When i first got my V-Rod, I felt no difference between the inverted front end and the V-Rod front end. if there truely is any, i think it minimal at all, as I am a handling junky when it comes to these things. I dislike riding sofr handling style front ends, as their weakness sets you up for suprises in tough turns, and the V-Rod in my opinion is not lacking, like say a Sportster or a big twin with a Sportster style front end would be.
My only complaint in this area is the ground clearance on the sides & rear. I often implant the lower fastener that holds the collectors on the header system into the pavement, and put huge dents into the bottom collector of the exhaust system, and have done so many times. The fastener is shaved at an angle almost like your front slash or backslash key on your computer.
Last weekend, for the first time, I planted the kickstand into the pavement into a tight reverse climbing turn, and was quite suprised to find the limitations of turning with the stock set up. Makes me wonder what one would have to do to put the V-Rod into a road-race version.
When reading articles about going to heavier fluids or Progressive Suspension hop-up kits owners install, the goal is to actually push the front end to where a minimum of up and down run is minimized. Stiffening or increase the amount of pressure needed for the front end to "dive" which aids in heavier braking activity in turns or emergency stops is the final realization of these kits.
Anyone ever bottom out their front end on a turn or power stop? I have not been there with mine, as usually I ride 2 up, with the weight load at about 340 lbs or so. if you are planting your front end to bottom out, then the suspension hop-ups I think are a definite need.
I am not sure that the effects of the front end set-up would cross over to wind and high/low pressure on either side of the bike, as it seems these factors are a study in 2 different departments of physics of suspension set-up versus climatic conditions and mass.