- Sep 15, 2005
Hi, looking in my Norton 74, 850 with the cylinder off. I noticed the cam had 1/8" reliefs ground into the side of the high part of the lobes. (looks factory done, not a hack job). I had assumed this engine was stock but after looking at the cam I suspect it may be a non stock cam. Are 850 cams relieved like this or does anyone know what cam is? I know that with some high lift cams that the cases need to be ground for clearance and /or the lifters radiused. But this is the first time I have seen the cam modified.