The clutch has less than 15k and I have adjusted the cable. Even tighten the spring tensioning nuts evenly. Yet every once in awhile while releasing the clutch it just grabs. I'm talking only letting out maybe 1.5 -2 inches which causes the bike to surge forward. What is causing this? I haven't checked the clutch hub to see if the fingers are worn and that maybe why the clutch is hanging up. Thanks for any help.