aftermarket swingerarm

[QuadRacer18]

I just bought a 250r and im thinking i might have an aftermarket swingarm, its pc'ed white and the roundhouse part has 2 slits and you can see the carrier inside, it also has a 10mm bolt in the back that appears to be for a zerk fitting or something. Could someone give me some imput, it is off an '87, what is the stock length from end to end of the swinger so i can see if its extended or anything. thanks!

[fireburns99]

It sounds like the stock swinger. The slits are supposed to have rubber pieces that go in them, and the 10mm hole in the back is for a bolt that holds int he bearing carrier. Hope this helps.