Started over a month ago. The bike was in 1st gear, and slightly pulling forward, shifting getting notchier, gear lever locking up attempting to shift into 4th or 5th. Bled the clutch. Smooth as silk. Another 60 miles or so, again. Bled the clutch, smooth as silk. Repeat. About 5 bleeds so far. Any suggestions? I have to prime the clutch with light taps of the lever before shifting successfully.