they aren’t…i rode a gsxr600 that i was going to buy…liked it a lot…and my cbr i love it…but as with any 600 and a new rider…you MUST respect the bikes power…i haven’t done my first fall yet and i’m not looking forward to it even though i know its coming…taking it a little easier will make sure that first fall isn’t at 45+. Just get an old F2 or an older gsxr and take is easy…i could see you enjoying a ninja250 yes…but i can also see you upgrading rather quickly after getting used to it