Was just at a Kawasaki update recently and they didnt mention any upgrades for the FR/FS series to get the FX air cleaner. I doubt they will.
Before the FH was available with or without the HD air filter. Same series of engine with 2 different air filters.
Now there are 3 different series of engines. FX gets the canister air filter. The others dont. The FR is the same as the FS except they leave out the pre filter.