I just bought a cherry 04 trx450r that has been sitting in a garage for the last 15 years. After buying, rebuilt the carb and did a oil change. Bike runs great. Installed all the goodies, bars, bumper, grab bar, nerf bars, some red hubs, Cecco key mount which looks great. Full sparks exhaust (race core), sparks cam, 185 jet. Custom air box lid. Bought the Athena 479cc bore kit, have not installed that yet. Last thing I plan on buying is suspension. A arms and shocks. I have to say there is something special about the sparks cam and exhaust together. The power throughout the bottom to top curve is crazy and it sounds awesome too. I hear DASA is the exhaust to have tho, should I try DASA out?