I have a 1996 Harley Davidson FLHRI that has a sporadic clunk or loud click. Slows the motor every time it makes this noise. Took it apart and nothing visually wrong. Bought the bike like this last year and I was told the clutch was just replaced and the noise should go away in about 1000 miles (yeah, right). 2000 miles later, it's still there. Getting rather annoying. Could the clutch be sticking? Wrong fluid? Any ideas would be helpful