It'd be quite alright to ride/drive any vehicle within the state of California sold and licensed in any other state, Stephen. The "California canister", an additional charcoal filter canister fitted down-line to the gasoline delivery system on motorcycles is only required to be fitted on them sold within the state of California and then registered with that state.
Btw, because unlike many states, California does not require motorcycles to go through an every-two-year vehicle emission inspection test as do all cars and trucks registered there nor a vehicle safety inspection in order to get your tags renewed, one of the first things we'd do after purchasing a motorcycle in that state when I lived there would be to remove that canister from the bike and stick the thing in a corner of the garage.
(...although this might have changed since the six years I've moved to Arizona...I DO know however that one of the last things the old "Governator" Arnold there did while in office was to sign a bill making many aftermarket exhausts systems fitted to motorcycles illegal...primarily "thanks" to all the idiots who believe that old wives tale that "loud pipes save lives" and who had pissed-off so many of the non-motorcycling general public because of it)
