i just purchased 2001 rm 250,after a couple of hours riding it seems to dump gearbox oil out,its happened twice and i cannot find where it is coming from,any help would be great..

 

I have the same problem

I washed it and noticed it seems to be soaking the top of the crankcase
But is barely even touching th bottom of the cylinder
There is zero oil on the topend

The whole top of the crankcase puddles up really bad though I can't find a crack and it only does it when I'm riding and its under pressure

Someone please help us the gasket on the bottom of the cylinder looks fine is there any common issue fixes