This mod is easy, free, and gives a subtle noticeable improvement.
I had the opportunity to sit on a seat concepts Vee2 seat at the last eastern gathering. The owner pointed out that it was a good seat as long as you didn't mind the forward position and a little pressure on the sacroiliac. I had a Shad comfort seat on my own Vee2, but was eager to give it a try.
It was as the owner said a good seat with the traditional tractor seat shape. I did notice that it seemed to place me a little forward and the my butt was up against the curved step to the passenger area.
When I posted my experience seat concepts took exception to my comment that teh seat placed the rider further forward. Turned out they were right. I had gotten use to my Shad comfort seat which provides a little more space for the rider.
Anyway, I bought a seat concepts seat and tried it for a while. Nice foam, comfortable bucket, but that pressure on the sacroiliac was still there. Seat concepts provides new foam and a cover that goes over the stock seat pan. Very economical and not too hard to do with good succes. The owner of Seat Concepts had explained to me that the stock seat pan was a limiting factor on the Vee2 seat. For some reason Suzuki put a ridge across the back that limits the depth of foam at the riders tailbone. You can see it here in this photo.
This is exactly the opposite of the Shad comfort seat which provides a relief in the foam (a hollow tunnel) under the rider tail bone so that weight is supported on the butt cheeks.
My course of action became clear. Turn the negative into a positive by removing the raised part of the stock seat pan under the tail bone. In theory it should give the same effect as the Shad seat tunnel.
It worked. A subtle change in feel, but the right change. The pressure on the tailbone is gone. Now it's just a feeling of broad support.
Seems like it should work as well with the stock seat as the seat concepts seat.
I used an rotary cut off tool to make the cut.