First off, I don't suggest anyone try this. I'm just posting it here for conversation, not as a recommendation. I assume no responsibility if you happen to try it anyway.

I don't know about you, but if I spend the day as I did today, riding twisties for 300+ miles my throttle hand gets really tired and starts to cramp. I had the same problem with an FJR I used to have and I fixed it by messing with the throttle springs. After I got back from my ride I took a look to see what Victory is doing in the way of throttle springs with the idea that maybe I could figure out a way to reduce the pressure. It turns out our bikes are using two return springs, one on each throttle body. In addition they utilize a closing cable so the potential for the throttle to hang open is remote. It turns out that the way the throttle linkage is made leaves the perfect opportunity to install a very light helper spring working against the original springs. I ended up using a 1.750" long extension spring with a .250" diameter and made out of .020 gauge wire. Its not a whole lot stronger than the spring you'd find in a ballpoint pen. I hooked it up and it supplies just enough help so that the Vision throttle now feels very similar to that of my Beemer. Just enough improvement to hopefully eliminate the hand cramping.I'm going to try it for a while and see how it goes. McMaster-Carr sells all kinds of very high quality springs so I may end up fine tuning this with a higher end stainless piece.

The helper spring is extended when the throttle is closed. Here is a pic:

And here is a pic at full throttle at which time the spring is completely relaxed:

Again, I don't suggest anybody do this. Fooling with your throttle linkage can be disastrous.

Marc