First light motorcycle?

Hello, I want to make the A1 soon and then buy me a good light motor bike it should be as strong and fast as possible, but because I can only have 16 am only 11kw / 15 ps and must correspond to 1kg per 0.1kw. But I have max 1000€ available and would like a brought cafen which has a very long lifespan so that I can drive with it for several years. I prefer a chopper wgen the desing. Can also be a used one. Until now I find the H yosung Gt , the Hyosung GV classic (which is best because of the optics) and the Honda Varadeo 125. Hope you can help me out Greetings Felix