With no load from a pump do you think the eccentric will really have much effect?  The weight of the sprocket is far greater than that tiny cylinder of steel, placed near the center of mass.  I tend to leave well enough alone.  Just a counterpoint...

11 minutes ago, Zed Head said:

With no load from a pump do you think the eccentric will really have much effect?  The weight of the sprocket is far greater than that tiny cylinder of steel, placed near the center of mass.  I tend to leave well enough alone.  Just a counterpoint...

I've never heard of any vibration issues due to the eccentric, so I tend to agree.  That said, it's one more thing in the torque stack that could cause the bolt to come loose.  I wouldn't take it apart to remove it, but if the bolt ever needs to come out for something else, I'd ditch the eccentric.

I would think the pump lever would absorb a lot of the energy that causes vibration but without it installed I would remove it. Now admittedly it has a low mass and a small radius but it shouldn't be very challenging to remove

The eccentric and its backing washer are very firmly attached to each other with 3 spot welds. Even if you did separate them, the backing washer is thin making the bolt (maybe) go too deep and bottom (pure conjecture). The later cams that came in no-pump heads with no eccentrics had a much thicker washer = to the eccentric + its washer. 

Leaving sleeping dogs lie. Lye? Lay?