http://redcatracing.com/parts_search...tscat=r&page=8

Middle column, second row. Order 2...[8D]

Oh yeah - we like to refer to that as the DEMONIC SPUR GEAR FROM HELL...
No, really though, it's not the spur gear's fault. It's the damned out-of-round clutch bell! Read my post on replacing the stock CB with an HPI H/D (hardened steel) 18tooth - http://www.rcuniverse.com/forum/m_4982701/tm.htm Stock is 16t. Too much torque, not enough top end. 18t will give you the best of both worlds...