so I've been rebuilding this yz450f. I've finally got the bike running good, but now I've encountered a new problem. when I bought the bike it had a little bit of free play in the clutch lever, but the perch was a little messed up. so I bought a new lever/perch set and everything felt great. went to take the bike for a quick spin down the road the clutch suddenly went super slack. I thought maybe the cable slipped further into the perch but that was not the case. the lever/arm that comes out of the cases seems to not be springing back all the way. I read somewhere about the long rod and the lever/arm wearing out and thought this might be the case but I'm not sure. anyone else have any idea what causes this? im going to tear into it but i want to know what to look for. I'd like to get the parts ordered up asap.