Complex sentence: Jed Metcher is a former Grand Prix motorcycle racer from Australia, who currently competes in the German IDM Supersport Championship for Team Suzuki Mayer; riding a Suzuki GSX-R600.
Split into simpler sentences: Jed Metcher is a Grand Prix motorcycle racer from Australia. He currently competes in the German IDM Supersport Championship for Team Suzuki Mayer riding a Suzuki GSX-R600.