Have been looking for two bushes for the rear swing arm [PN: 90386-18135]; not a sausgae on the internet. That is until I tried a XJ600 facebook group asking if anyone knew a source to buy, or dimensions so I can fabricate some myself?

A guy in holland came up against the same struggle so he made a batch for himself with a part maker. Having leftover parts, he had stock to sell. The rest is history. Amazing who you can meet on the internet eh. Part is pictured above. Below are the dimensional details of it just incase I have to make some myself.