This is a JRI shock that came off my track bike. I used it for 6 track days and decided I wanted a piggy back instead. I had it rebuilt and then put it on my shelf in the basement and forgot about it until now, a year and half later. Rebuilt by SB Suspension. This will fit a 2005-2006 ZX6R guaranteed, and it might also fit other year ZX6Rs or a bike like a SV650. Center to center is 13.25 inches. Spring is a Ohlins with a rate of 105 N/mm It needs a good home. 600 shipped