Went on a short ride today (150mi total) and atleast three times my bike dropped from second to neutral unexpectedly. This has happened before as well...its only when i'm hard accelerating (running out the full engine spectrum). I shift from 1st to second at about 10k rpms (which drops it down to about 8k) then when it gets back up to about 9k it drops again. I havnt had this problem with any other gears. The clutch lever also pops when this happens, rapped me on the knuckles pretty well.
Has anyone else had this problem? and is it easily fixed?