My YZ250FX starts first kick hot or cold. You mean it won't kick start without a battery in it? What altitude do you ride at? I can't start my FX by kicking from cold - only once it is warmed up. Similar sentiments here. I'm getting older and weaker and the 450Fs are making more power than I can use most of the time. I'm finding the 250FX has more than enough power most of the time and is easier to manage all of the time so it will be my primary ride especially at night and in Baja. I reserve the right to change my mind but seriously the FX is a versatile ride. I went from a 450F to the FX and I couldn't be happier. I ride mostly XC and spend most of my time in 2nd, 3rd, and 4th. The FX has the exact amount of power for what I do. I felt like it was easy for the 450 to get away from me especially when i started getting tired.