If you want to spend extra money and time doing rebuilds to keep the power up go with a 2 cycle. 2 cycles get poor gas mileage and stink up the riding area. The old 2 cycles have nothing on the technology of the new valved engines. 2 cycles have no torque and are have very unpredictable power bursts. Do yourself and your wallet a favor and get a reliable 4 cycle. In a few more years, if not at present, there will be no comparison between the two. I used to the love the smokers, but they are going by the wayside.