We used oil can cause it's all we had at track after learning it from another rider, We almost did not race because of it and even brought the ktm to dealer bought all new brake parts and still didn't work. They could not work it on for over a week. The other rider said that Dealer brings it in their shop and does it for $50. That Dealer lost our support after that and they new we had a race that day but against one of their riders. Oh by the way we won against their team rider!
They do the trick, to helps with upper air lock areas. We will always use this method because we seen best results.