When I start the bike up in neutral then depress the clutch and shift into first it takes off without releasing the clutch lever. The bike started this gradually by just lurching forward when put into first gear but only after it set overnight. Usually after a couple tries I could ride and it would be okay until it set overnight again. Now I can't disengage the clutch at all by depressing the lever. There is plenty fluid in the reservoir. Any ideas would be helpful.