>>28472879
>Some say they're very good because you can buy it and keep it for years
correct

>while 125 will feel boring after a month
incorrect
125 is scooter territory. if you want a scooter, its fine forever. if you want a bike, 125 is a joke.

>and 300-500 will feel boring after a few months
depends on the bike. some are quite fun, some suck ass.
about the only bike in this displacement class i'd actually recommend is the kawa with the 400cc i4, but its NOT a beginner bike, so stay away.

> even less beginner friendly than a 600 supersport
incredibly, unbelievably, unfathomably wrong
a 600cc supersport is NOT a beginner bike by any stretch of the imagination. its incredibly fast and its torque curve makes it extremely treacherous. pic related (top)
in contrast, a 650 like the sv is much friendlier to noobies. again, pic related (bottom)
notice how the power delivery in the 600cc supersport is very non-linear. you apply some throttle, nothing happens, you think "hey, this ain't so bad" and then BOOOM MOTHERFUCKER 110hp, hope you were ready for it fuckboi, lol
the sv650 however, is easy to understand and predict.

my suggestion
>don't buy a fucking bike
seriously tho, don't. they are quite dangerous even if you're not a retard. if you are a retard, well, at least sign up as an organ donor before hand.
if you really, REALLY need a bike, eg because you live in some big city and traffic/parking are impossible, get a scooter. and safety gear. and be very, VERY careful of retards.
and if you decide to ignore my suggestion, definitely avoid a 600cc, definitely avoid a non-scooter at 125cc, and definitely don't buy a turbo busa. i know its tempting, but don't.