Ed..I do not remember a bushing going thru the back of the motor. I do remember the bushing in the swingarm tho, those were the ones that were nature welded (rusted) to the pivot bolt. this is one of those bushings that I had to cut off the pivot bolt to get it out of the motor and here is the pivot bolt still in the motor..note that on the left is the other swing arm bushing..I was able to drive the pivot bolt out from the right side of this pic Now this is the pivot bolt..where the rust spot is, is where it went thru the motor. If I remember correctly, the only 'bushings' on the motor there are the ones evident in the pix, and I think those are part of the engine case. I have and extra motor sitting in the box and I will pull it out and look closer at it so see if it is possible that they are molded into the cases..will get back to ya on that. I lucked out when I had to cut thru the swingarm that there happen to be one on ebay and if I remember right, I got it for less than $200...OEM price was abt $500. Yeah it cost, but was worth it to me..I got tired of wrestling with it and wanted it off. Good luck and I will get back to ya on the bushing thing, unless someone beats me to it.