Sure..you can buy the gearing for the winner sport and fit them with a couple changes but I noticed they can be a pain sorta unless you really know what your doing with them. And as far as servo's You can get those from almost any RC Hobby shop. I changed mine to Futaba S3001's and they work great. Be sure thats the real problem though...check all your links and most important your servo savers...look at the manual for the location and all. Hope that helps...I have also ordered from Excelhobby and no problems yet. They have the best selection of parts by far, with decent shipping rates.