<page_title> AMA Supercross Championship </page_title> <section_title> AMA Supercross Championship winners by year </section_title> <table> <cell> 450cc Class (formerly 250 cc 2-stroke) <row_header> Year </row_header> </cell> <cell> 250cc West (formerly 125 cc 2-stroke West) <row_header> Year </row_header> <row_header> 450cc Class (formerly 250 cc 2-stroke) </row_header> </cell> <cell> 250cc East (formerly 125 cc 2-stroke East) <row_header> Year </row_header> <row_header> 450cc Class (formerly 250 cc 2-stroke) </row_header> <row_header> 250cc West (formerly 125 cc 2-stroke West) </row_header> </cell> </table>
AMA Supercross Championship are the 450cc (was known as 250cc two-stroke), and both an East and West division on the 250cc (was 125cc two-stroke).