Just purchased a 85 vf700f and the right front brake caliper is sticking. I removed the caliper and tried to push the pistons back in but could not. They do go back in if you open the bleeder. I installed new fluid and bled system and that did not help the issue.
I assume you cleaned the pistons thoroughly with a chrome cleaning polish,going by the year of the bike the calipers may need a new seal and dust seal kit,replace all the seals in the calipers,not an expensive or difficult job!!
