I bought a motorcycle in nevada and cant register in in california because it is a 49 state bike..loophole?

now i am riding this bike with it registered in nevada being a cali resident..ive had cops tell me they could seize my bike but none have..i wish there was a way out besides having to sell to someone in nevada..ive done alot of research , swapping speedos etc.. can you appeal a decision by the dmv..they have flagged my bike in the system so i can never register it.. please help