those are the distances from the centre of the hole to the other centre of the hole. NOT the entire length!!
i don't know if it would also fit bandit 250, you might wanna put the bike on something so you can have the rear wheel in the air (like a centrestand does) and measure the distance yourself, that way you can also exactly define how high you want the rear to be, since your making the dogbones yourself.
i didnt notice any difference in the suspension, which would seem logical since the movement of the spring doesnt change much with the shorter dogbones.