I just dragged my old 250N shocks out yesterday to clean and paint them, just for show as they are f@#$d. 395mm eye to eye and 120mm of shaft travel to bump stop. I have some PE shocks with the RM springs on the N at the moment and they work really well, they are 400mm eye to eye. I tried some Hagons that were 420mm eye to eye, they were way to long and made the brake rod and stay to jam on the swingarm.
Hope this helps.
Cheers Nob