Oil coming out exhaust on right cylinder

I posted a thread last week about problems with the left cylinder.
I pulled the carbies apart again, cleaned and replaced spark plugs. When I put them back on I forgot to connect the balance pipe. When I started up it was running a bit rough and when I gave it a bit of throttle there was a massive backfire out the right cylinder.
I realised that The balance pipe wasn’t on and fixed. When I started the bike again it was running smoothly on the left cylinder but didn’t seem to be firing on the right. When I gave it a bit of throttle I put my hand over the right exhaust and just got a heap of oil over my hand.
I pulled the plug on the right cylinder and it was clean.
obviously something has gone. Could a blown head gasket cause this?

Park the bike facing down-hill, or use thicker oil.

acotrel said:

Park the bike facing down-hill, or use thicker oil.

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Very helpful

If the plug is clean the oil is more than likely coming from outside the combustion chamber. Probably the exhaust guide to valve stem or to head or both. Remove the exhaust pipes and have a good look in side the ports.

Agree with Cash
My bike ran well but had oil in the pipes.it was the guides going up & down with the valve.

What a nightmare of symptoms. Oh my gawd.