I picked up a used set.

I notice that one rotates almost effortlessly with my fingers which tells me it needs grease.

I dont have the gun for this nor a syringe like some use.

That said......i could take it to a shop and have them inject them both for cheap.

I have heard people talk about taking them apart to grease them because the injector doesnt really get in the needle bearings very well.

Being that these are used....would you recommend taking them apart to inspect and grease or just jam it full of grease with the gun and forget it?