A lot of aftermarket A Arms come with Zyrk fittings. The problem with them is this, depending on the AArm location, a Zyrk fitting could get broken off during full travel of the A Arm. Which is why a lot of the companys offer plugs for the locations of the fittings, so you throw the zyrk in just to grease it, then take it out and put the plug in which is recessed just a little bit. I've had both types, stock arms with out fittings, and arms with. Most of the arms I've had with fittings, it is hard to grease, as in it doesn't want to take grease at all unless you loosen the bolt up. Others, like on the XX, I just disassemble after a while and regrease the bearings. Zyrks do make life a little easier though. But I like tearing mine apart, then I can really get in there and check for damage, and wear and tear.
2008 700xx; Power Bomb header with power core 4 exhaust, Power Programmer III, pro armor nerfs, prm products control front and rear bumpers and full skid, 10" ITP rears, ITP Baja's fronts, RZR 2's all the way around, Uni filter, 13t sprocket, CCP steering Damper, DS450 shock swap, Dual Gasser Throttle, bar risers and Moose barkBusters. 730XX kit plus other engine mods!