I'm installing the 3rd starter clutch in an SSR Bison 200. The original one sheared the three bolts off the clutch. The high performance second one sheared SIX bolts off the clutch after only a dozen starts. I see nothing out of the ordinary with the starter motor, the idler gear or the crankshaft. I ordered another high performance clutch but I'm hesitant to install it without an explanation as to why the first two failed.