I'm trying to help out a 14 year old kid, who is new to the big bikes. He bought this 2001 YZ426F a couple months ago and I've been teaching him how to perform routine maintenance on it. I showed him how to change the oil today an it looked like it hadn't been done in a while. I drained the frame and engine. I pulled the frame filter and cleaned it. The engine filter was so badly caked with black stuff, it was caving in on itself. So I replaced it with a new one. Once I got it filled back up with fresh oil and started it up and let it run to curculate the fresh oil, I turned it off and let it sit so the oil could drain back down for a few minutes. I checked the dip stick to see the oil level and it was jet black already. My question is, does this mean the clutch is burned up? Thanks for any insight on this issue!