Curious what size jockey wheels are used on the EGR? Goldix have a few steel bearing jockey wheels and LTwoo seems to use off-the-shelf parts when possible. Would any of these match?
https://www.aliexpress.us/item/3256803396383834.html
I finally got around to replacing my gritty jockey wheel last night. I had bought a super cheap aluminum ZTTO branded 13T ball bearing jockey wheel as part of a choice purchase on Ali for less than $2. I was worried it might be too big, but it actually turned out to be smaller than the original. I believe I counted 14t on the Ltwoo wheel. So, close enough to not be an issue. I'm not sure if 15T would fit, but I would think anything 16T or bigger would likely be too big.
13T was fine and the jockey wheel worked for now. I'm afraid that this bearing wasn't sealed, either, and will suffer the same fate as the original once I hit some water and mud. At that point, I'll just replace the bearing since I'm pretty confident I can pop a new one in and out of the wheel and will likely go ahead and do that to the stock one now that I have it out.
I replaced the bottom jockey wheel. Has anyone replaced the top jockey wheel, or even removed it? I can't seem to remove mine. The hardware for the arm is not backing out. I didn't investigate further, but it almost looked like it wasn't designed to simply "unscrew".