250crf tranny and egine oil issues

I have a 2004 crf250 and when I went to change the tranny and engine oil it seems that I have more engine oil than tranny fluid than what I started with.

I do not see any leaks from the cases and the bike runs fairly strong. My buddy said that I may have a bad crank seal. Is this correct?

If this is correct how hard is it to change it? Do I have to split the cases? :whoa:

I was going to change the top end because I am getting oil out of the breather hole thinking that the rings are bad but I still have good compression. Could this be why the oil is coming out of the hole or is that just another problem that I have to fix. :|

Any help would be appreciated.

Thank

Thanks

I will go and order the parts. Do you think this is also causing the oil out of the breather hole? Or is it just worn rings?

Thanks