Looks like an 86 to me. The stock 86 tank was white, this one looks to have been repainted. 85 has red headlight and black front fork boots. 86 has white headlight and blue fork boots.
86 swingarm is different than 85, looks 86 to me, but cannot see real well
Another easy to see difference is 85 has black headlight switches, the 86 are colored (white and yellow)
ATCnut
82 185s - sold
83 200x (hopped up)
84 200x (stock)
84 70 (lost this one to the DMV)
85 70 (soon to have lights, a foot brake, and CDI ignition)
84 200es (parts trike) - sold
85 350X (the best)
85 350X (siezed motor, dream of a poweroll kit someday)
85 250sx (frame was trash, got parted out)
86 250sx (the tractor)
86 250sx (a nicer tractor)
86 250sx (an even nicer tractor)
87 200x (parts trike, its really rough, a dog was chewing on it for a while)
87 250es Big Red (the tank!!)