If you can ride a 250 you can ride a 1k is a contraversial statement. Yes you could if you wanted to, but that all depends on the rider and thier need to go fast. Some people could go to a 1k and be perfectly fine and be responsible with it, and learning about the different kind of power as they go. Others they will test the power more and more until they are sitting in a ditch bleeding to death or end up tboning a car. There are very huge differences in throttle control with a 250 to a 1k. You have a larger chance of lowsiding a 1k than a 250 just because the difference in a quarter throttle on both bikes a HUGE difference in power. Brakes on a 250 and a 1k a very different too. Most 250s have a single sided rotor and caliper while 1ks and other performance bikes have dual or even have brembos. You come from a 250 to a liter and grab a handful of brake too suddenly you could go down because of that. So there are two sides to the story of coming from a 250 to a 1k, but I beleive there is more harm than good to it. Not sure what all the hurry is to get to a 1k, enjoy the ride and upgrade in progression. You never know you may enjoy a lower cc bike than a 1k. I know I did. Coming around twisties a 1k is just not very fun which is why i went with a 750cc vtwin.