I HAVE A OEM REAR SHOCK OFF A 1986 TRX250R.  THIS WILL NEED TO BE REBUILT. THIS WILL WORK ON THE 1986-1989 TRX250R AND THE 85-86 ATC250R. PLEASE SEE PICTURES FOR CONDITION. DON'T FORGET TO CHECK OUT MY OTHER ITEMS FOR SOME MORE GREAT TRX250R PARTS. THANKS CVETKO