What it sounds like is your lever is not getting fully pulled. There is a micro switch in the clutch perch that the lever engages when pulled, that allows the bike to start. As far as the clutch plates not disengaging, that could be a few things. Clutch needs to be bleed, bent push rod, busted slave mount, low fluid level in reservoir, master needs rebuilt. The list goes on. We really need more info. What have you done to the bike? What have you already ruled out?is there a constant thing that will cause it not to work?