Complex sentence: On June 30,2016, four-time world champion Supersport circuit-racer Kenan Sofuoglu the most successful (WSSP) champion, made a top speed attempt that the Turkish President endorsed and that was sponsored by Kawasaki.
Split into simpler sentences: On June 30,2016, four-time world champion Supersport circuit-racer Kenan Sofuoglu the most successful (WSSP) champion. Made a top speed attempt that the Turkish President endorsed and that was sponsored by Kawasaki.