I was in a desert race and I was in a area where I was fanning the clutch lever quite a bit. I then noticed when I tried to shift, I would pull in the clutch lever and it would not disengage. It did a little but not fully. It went away though. It might of got hot. Does anyone know what causes this? Do I need to replace something? I have a 05 450 with a few thousand miles on it.