the newest batch i got not long ago are new redesigned more like the old R4 rods of 2005 or so ... R7/16 it seems as though the aluminum is harder in these newer rods ... not sure yet ... havent had one failures from any customers with em ... soo i am thinking they may be good

the rod is literally the weak link in these little 2 strokers ..... all manufacturers are susceptible ..... too heavy they dont run right ... too light and they are weak and both effect the reciprocating mass ..... whatcha gonna do