all balls here too, and grease zerk installed on both bikes, but unless you leave the inner seal out of the bearings, grease will never get to it when pumped into the zerk, but keeping the carrier full of grease at least keeps water and mud out,
have you ever picked the seal out of a brand new bearing ?????
threres not even enuf grease in there to "run one off" properly, let alone keep the bearing lubed, pick the seal and pack it full of good red or blue waterproof grease,
it'll last much longer, and stay outta the deep water and mud, buy a 4x4 if ya wanna mud bog