Riding to work this morning and shifting started going south in the span of 30 minutes. Had trouble shifting into neutral. Eventually, when I came to a stop, I would have the clutch pulled all the way in and I would have to use the brake from pulling forward and giving it throttle to keep from stalling. At this point the clutch lever had a ton of slack before it would catch. I stopped at a gas station and used the adjuster to take up the slack. Everything was fine for about two blocks and all the slack came back. I parked it and had it towed. There was no fraying of the cable at the lever and the adjuster was very tight. What could be the problem?