that is still a threaded tip where the stock motor has the c clip to hold it together. This is what i have look at the tips http://www2.towerhobbies.com/cgi-bin...?&I=LXHTN0&P=0 this is what i bought http://www2.towerhobbies.com/cgi-bin...?&I=LXGGP7&P=0 and like i said the new motor has a shorter crank than the 15 which everyone says you have to cut it well there is nothing to cut. And that part is like 40 bucks il just return the motor and get the right one cause there the same price.