IDM Supersport : Marvin Siebdrath Celebrates His First IDM Victory
It wasn't the fastest rider in practice, Luca de Vleeschauwer (18, B), but his teammate Marvin Siebdrath (Wildenfels, 16, both RT Motorsports by SKM-Kawasaki) on a Kawasaki who won the first race of the IDM Supersport …