I had a thought today while being bored on watch and touching up on my FAQs when I saw the idler pulley thing and that ppl have been replacing them with others of the same size or close. Why? I bring this up because I have had issues with them locking up and such. I just want to put it out there that you can replace the bearings in both of the pulleys the part number is on the side of the bearing just press them out and pop the new one in. I personally have had this issue of locking up and Burned up my Kevlar Belt. Just some FYI for those who didn't know.