River Fluid Power is proud to offer our 6686261-HT; an upgraded drive motor that has a larger diameter internal shaft. These motors are the same dimensions as the original and easily bolt right in. Because of a very slightly larger displacement, you will lose about 0.1 mph of top end speed. The larger displacement also means it is better to upgrade both drive motors to keep your machine tracking straight. Contact us today to get your MT machine moving again! (MT52, MT55, MT85 and MT100)