 They were also raced in the United Kingdom in the Honda CB500 Cup (changed its name in 2009 to the Thundersport 500 when Suzuki GS500 and Kawasaki ER-5 were included).The half-faired Honda CB500S was introduced in 1998.Production of the first CB500 twin range ceased in 2003 as the engines could not meet Euro 2 emission regulations.