Over the course of my precious few last rides I have been able to get in the past couple months I have noticed that she seems much smoother when runinng at mid rpms and just revving her up. To what can this be attributed to, a TRE that was added around 1500 miles or the fact that she now has 2000 miles total. Kinda hard to explains, just sounds throatier and "better" than before. Appreciate any input.