I have a 2001 scramler 400 2 stroke. It runs fine but started making a screeching sound. It is coming from the front. It stays at the same rpm as the motor. It is not in the transmission. It sat with no fluids for a while. I repolaced the water pump and seals. It has run prob 10 hours since then with no problem. I just moved and went to sell it today and it out of the blue started making this noise. The counterbalance oil was low when I checked.