The clutch on this quad is slipping. Engine runs great, but revs really high before the clutch engages and begins to move. I tried adjusting the clutch by backing the adjusting screw out until I felt slight resistance and then taking it in an1/8 of a turn before locking it down. This didn't help much. So, is that and indication that the clutch is completely shot? I ordered a new one and a spanner tool to remove the clutch, but just want to see if I'm overlooking anything else.