Yamaha 5UG-45593-00-00 Flange Coupling Assembly

The Yamaha 5UG-45593-00-00 flange coupling serves as a critical connection component within the middle drive gear assembly. It transmits torque from the engine output to the driveshaft on select Yamaha Rhino side-by-side utility vehicles. Manufactured to OEM specifications in Japan, this steel coupling ensures precise spline engagement and rotational balance for reliable power transfer in off-highway conditions. Direct OEM replacement for part numbers 5UG-45593-00-00 and 5UG455930000. Confirmed fitment includes Yamaha Rhino 660 (YXR66F) models from 2004 to 2007 and Yamaha Rhino 450 (YXR45F) models from 2006 to 2009, covering standard, Special Edition, Hunter Edition, and Ducks Unlimited variants. Install into middle drive gear housing per factory service manual torque specifications.