So, I love POWER! I have been thinking of doing all the necessary parts purchases to do a 440 kit, with a carb, porting, and camshaft. What (from those who HAVE DONE the 440cc kit) are the drawbacks reliability wise? And how much difference did you find when you did the big bore on a stock motor, and how much difference is an ALL motor with the stuff I said I want to do? BTW I will be buying the parts as i can afford them then probably doing this late winter. BTW, my XR is plated and I ride it on the street!