My friend has an 87 Aspencade and we noticed that his seat height is almost 2" lower than my 84 VR. Last week we both had our seats in for repair. While they were apart we compaired notes. All of the height difference is in the foam of the seat. Mine has at least 2" more foam and is somewhat more comfortable. So I guess taking some foam out won't be a big problem and as long as you don't take out too much it should be just fine. You could also take out more foam and replace with a gel pack. I heard that a gel seat is VERY comfy.