I always wanted to have a ridged, so a year after being hit at a stop light on my 03 springer I had some insurance money to spend and started with this 06 Big Dog.I had the heads ported and polished,124 inch valves,shaved the cylinders .050,600 lift cam,added a Karata 4 inch belt drive and some custom built pipes to the 117 inch mill that came with the bike.Now the bike goes like hell.