Primary Drive Clutch Sheave Fit Yamaha ATV Grizzly 660 YFM 660 2002-2008 RHINO 660 2004-2007 57242646Introductions: A clutch is a mechanical device that engages and disengages power transmission specially from drive shaft (driving shaft) to driven shaft. In the simplest application, clutches connect and disconnect two rotating shafts (drive shafts or line shafts). In these devices, one shaft is typically attached to an engine and other to power unit (the driving member). While the other shaft (the driven member) provides output power for work and