Sitting on the motorcycle for too long compresses nerves and blood vessels . A softer seat is often not the way to go. On my 2010 I have a sargent seat and this is actually a bit harder , but better made and it makes a big difference. Last week I did 280km in 1 day and I had some pains in the wrists and knees, but not on my bum.
On the other hand, If in summer I ride in a kevlar motorjeans, it is worse than if I wear my textile overpants over my regular jeans in winter. The extra layers do make a difference.
You could try an Airhawk aircussion or something alike, if you plan to do a longer trip. I have read good things about it, but never needed one myself. The disadvantage could be that you sit a bit higher .
You could also try a special undershort for mountainbike riders with a gelcussion on the right places. These also give extra comfort and less transpiration with thick chamois and breathable fabric.