hey all, are the two little collars that shim into the rear wheel hub left/right specific? these are the collars that ride between the wheel and the swingarm and are what the axel feeds through. at a glance they look the same. however, each one either already has or has developed it's own unique fine groving all the way around the collar... i can't tell it that is a groove that was put in at the factory or it thats the result of me not running enough grease inside the collar. every time i put my rear wheel on i spend the first half of the next ride psyching myself out that i have the collars reversed. i checked the shop OEM honda shop manual and it does not elaborate, however, it does refer to "left collar, right collar..." any ideas?