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I had a 'spongy' feel to the front brake on my Monster, kept bleeding it resulting in the occasional small bubble but no real improvement. Left the brake tied back overnight etc. No improvement.
Decided to bite the bullet and investigate a new pump so opened the r/h caliper nipple completely to start draining the sytem, after a couple of pumps with full flow through the drain tube, I felt the vibrations as a load of air came through! Tightened the nipple and wow! the brake was superb! topped up the reservoir and brake was good from then on.
My conclusion is that my 'conventional' bleeding method of cracking open the nipple and then closing it again just did not move enough fluid to get the air out? may be worth a try FWIW
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