SEE PICTURES LOOKS LIKE THIS GEAR WAS DROPPED. I HAVE A COUNTER SHAFT 5TH GEAR 25T.  THIS IS THE 87-89 RATIO. THIS WILL WORK ON THE TRX250R 1986-1989 AND THE 1985-86 ATC250R WITH THE CORRECT RATIO. PLEASE SEE PICTURES FOR CONDITION. DON'T FORGET TO CHECK OUT MY OTHER ITEMS FOR SOME MORE GREAT 250R PARTS. THANKS CVETKO