Okay now your just making me feel bad. I was always under the impression that people who like to mod their machines have a better understanding of how one aspect of change would effect another area.
I think a lot of spyder owner's are new to bikes,they don't under stand M/C engines. a engine just a pump if you add something on one end you need to add on the other end . M/C engines are relatively small and your sitting right on top of it so any modification if not done just right will show up REAL quick.