I recently got annoyed by the propensity for my jockey wheels to run out
of lube. The trouble I suspect is that it is difficult to adequately
lubricate them during assembly, so I made it possible to lubricate them
after they are assembled.

I bought a grease syringe that fits my grease gun, and I drilled a hole
into the jockey wheel such that I can pump grease directly into the
middle of the plain bearings.

Campagnolo jockey wheels use a soft metal outer bearing material, so it
was easy to drill through the plastic wheel and the bearing material.

--
JS