So I just got my bike running this weekend after sucking sand in through the crankcase breather hose. The bike runs very well, power is back where it needs to be, but my clutch is acting up. It makes more of a growl than it used to, I have had 3 450's and all of them have had noticable clutch noise when they are in neutral and you pull the lever in and out. Anyways the clutch is not fully disengaging either, it is almost impossible to get the bike into neutral while it is running from first or second gear. My question is what could the sand in the motor have done to affect the clutch like this? When I pulled the clutch plates out I had to pry each one off of its respective metal plate. The basket and inner clutch hub are both notched a little bit, but should not account for the whole problem I am seeing. Could the sand have ruined my fiber plates so that they behave like this? I noticed that it did this the last ride before I found out there was sand in the motor as well. Any ideas???