MINE COULD COME FOWARD APROX A 1/4" BUT NOT MUCH MORE, IT WILL NOT LEAVE MUCH OVERLAP WITH FUSELAGE BUT I'M SURE IT WILL WORK. I USED A SOITO 125 AND IT IS WAY FOWARD ON THE STD. MOTOR MT. MY PROBLEM IS FINDING A SPINNER SHAFT NUT THAT WILL FIT NOW. B.R. MIKE.