There are 2 different set-ups,on the RER. One with plain "bushings 7018822
,like the worn one in your photo,the other is a "ball bearing". used in "X-tra duty" ,and some larger engines, they were used less and less as the RER was made, I don't know if they were used at all on the very late ones. The "worn out" bushing can be pretty common,the riders,L/H side had a grease fitting,for the bushing,and sometimes doesn't get greased.Mine was worn almost through the bushing,they can wear through to the fender ruining the axle., the bearings have different size holes in the fenders,and cant be interchanged without changing fenders. The bushing is a "light press" fit,it has an "anti-rotation notch",but can slip and rotate,if the "cross-over rod is bent,letting the fenders,move inboard enough to release the notch.Is the worn bushing on the side with the transmission case bolted to the fender? it's usually the one on the "long axle",on the riders L/H (while he's in the seat,not looking at it "up on the bumpers) The one on the transmission side is usually lubed enough from leakage from the trans.