Originally Posted by epicxcrider
Got it. Guess I'll give the OEM ones a try, and if it's no good I'll have a suspension tuner figure out which springs I should get while they do the damping :)
When you take them apart you might see a marking on them that will tell you whether they are the lighter or stiffer version. Springs are only about $100 so take a look and see what you need.
The racetech sight might help but when you go there select the Aprilia RXV 450 and then for your weight out in your weight + the weight difference between the BMW F800GS and the Aprilia RXV 450. See what that recommends. (Do not go by what it says for the F800GS. They think its a street bike and it comes back with some very stiff springs recommended).