I just installed the Sudco FCR39 kit for my '04 GO!!!!. I had an older KLR that I switched the CV carb for a FCR and remember what a huge difference it made in power and response. I thought that it should have a similar effect on my KTM. Was I RIGHT!!!!!!!!!. This thing is incredible I dont have the jetting fully sorted out and it is a bear to start but it just RIPS!!!. It feels like it has more grunt than my Concours 14. Money well spent.