LONGTIMEHDRIDER, I have an 09SEUC which I have ridden thru the desert to Las Vegas at temps easily reaching 107-110 degrees on the freeway and in traffic. The engine management system would shut off the rear cylinder like it is suppose to do. The only problems I encountered is that when it was stock I had to endure constant pinging (under a load) when I used non California gas. This happen from the time I filled up in Las Vegas (went to Gordon Nebraska from Simi Valley CA and back last June) until I filled up in Oakhurst Ca on the way home. Oakhurst is in the central east part of CA. Since then I have installed the Fullsac setup with 1.75 inch baffles, Steve's map, removed the cat, and HD open air cleaner. When I make my next out of state trip I will make a post regarding the pinging issue. Congradulations on your new bike. Let us know how your fans work in traffic. I would be interested to know if they cool the engine enough so that the engine management system that shuts off the rear cylinder does not cut in. Thanks CAHDBIKER