Iowa no longer allows converting off-road bikes...current registration, or not. When I moved here from IL in 2010 I wasn't allowed to register my 250EXC that was plated in IL. My neighbor moved here from Kansas and was denied a plate on a 450X that carried a current Kansas tag. Visit the Enduro forums. There's many stories of Iowa DOT knocking on doors and seizing plates from ineligible bikes. If there's an off-road bike that's currently registered in this state, it's only a matter of time.