Valentino Rossi’s step brother Luca Marini, will be debuting this weekend at Mugello in the CIV’s Moto3 category and his big brother will be sponsoring the team with his VR46 merchandising company14-year old Luca who won last year’s MiniGP championship will be riding a Honda NSF250R4 in the Italian series and is supported by Honda Italia and the ever present San Carlo (the same snack company that sponsors Fausto Gresini’s MotoGP effort), however Rossi won’t be seeing his little brother’s debut, as he’ll be at Jerez de la Frontera this weekend for the final official pre-season test.