If the 20' shocks mounts exactly like the 18-19' shock, yes.What i found out from Race Tech is that the shock in the '18 & '19 is longer than the one on the '20. Will the current GSXR's shock fit in the '20 ninja 400?
+1. This is unlikely. Not sure where Racetech got that from. And if it is shorter then how much by?According to Kaw's parts diagrams, both the '18 and the '20 use the same shock, 45014-0605-37S. I would find it very strange for them to change something like that, as it would require other changes to not affect a number of other things on the bike.