The Manx tank is under redesign to reduce the price. Omar's is also changing the bottom so it fits SR500s and other brands and models. New tank will have a standard gas cap and the bottom edges will not be rounded. Fits on back bone with my new hidden center mount kit. The hidden center mount is a precision molded stepped hole which accepts a spring-loaded cover cap to hide mount bolt. Comes in paintable white gelcoat. Not DOT or SAE approved for highway use.