This Kouba lowering link fits the Honda CRF450R 2009-up. There are two options the CRF9-2 link and the CRF9-3 link. Below are the amount of lowering the CRF9-2 and CRF9-3 provide respectively.
2009-10 CRF450R .875" 1.6"
2011 CRF450R 1.125" 2.1"
2012 CRF450R .9375" 1.8125"
2013-14 CRF450R .875" 1.875"
2015 CRF450R 1.0" 2.0"
Some are using the CRF9-2 link to improve corner handling.