Need clutch advise. I have replaced the clutch master cyl and slave cyl and reversed bled the system (pushing fluid from the slave cyl to the master cyl). Every time I want to ride my bike, I must crack the nipple on the slave cyl and let a little fluid naturally release. I then tighten the slave cyl and I have a working clutch. I can ride a few hours then the clutch starts slipping and I loose my clutch. After I crack the slave cyl I have a clutch again. Any ideas?