oil over rotor

have just rebuilt my 1998 wr400 to replace a worn selector fork, which seems to have solved the problem I had with the bike jumping out of 5th gear.

Now on the not-so-good side.

I now seem to have very high pressure in the crankcase, enough to spray oil out of the channel that links the generator (rotor) area with the gearbox, and coats the rotor and stator with oil. Its as if the oil isn't being picked up properly, or maybe if the oil runs through one of the gearbox shafts - do I have to align the oil feed hole in this with something? This was the one thing that I wasn't certain about when I rebuilt the gearbox.... would this cause the problem?

I can't find any crankcase breathers that could be blocked so I assume the bottom end vents up the channel for the timing chain, and then out the top camshaft cover and the thick black pipe on the top (which is clear).

Any ideas most welcome, thank you.

Cheers, Red.

stripped it down again - nothing wrong found. Re-built - same problem.

Any ideas chaps?

Cheers, Red