It had a strong clutch but I only ride the bike maybe twice a month for 20 minutes. Last couple of times I noticed clutch lever needs to go farther down to disengage. Now it goes all the way down and it doesnt disengage at all. I opened the fluid reservoir and it looked empty. I put dot 4 in and it quickly filled up but its still doing the same thing. Is there air in the system? Is the clutch out? The bike was laid down few months ago so that could have something to do with it. Any help would be appreciated.