I have a '00 YZ250 and last couple of rides it has been leaking oil out of/around the oil cap, its not coming out of the cases or nothing like that but out of the cap itself. Do i need to replace the cap or the seal or is there more to it than just that?? Its only started after i had changed the clutch plates. Inbetween the 2 rides i drained the oil and put in the correct amount of oil and still leaked. Cheers to anyone that knows or can help me.