Oil drip after long rides/high RPM

Hi, I'm riding an 81 xj750r. Twice in the last couple weeks, it's left oil puddles after a long ride/high rpm's. I've ridden it probably 10 times, and it's only happened twice. Also, the first one was before an oil change, the second after. If anything the oil level is low after the change, so I don't think it's due to overfilling.

The oil seems to come off the back of the engine, so it kind of looks like it's coming out of the airbox just like if the oil were overfilled. Could something else cause oil to end up in there? Is there something else that could be causing this? Should I be worried about riding on it?

 

How about the cam chain tensioner body-to-cylinder gasket? Not uncommon for that to start weeping.

It could also be excessive oil in the crankcase "breathage" what oil are you running and what are the temperatures like in wherever you are?

Have you checked the oil level? Bike warm, on centerstand and motor OFF for at least 10 minutes beforehand. Look at the little window; you should be full with a slight bubble at the top.

 

Like bigfitz stated above, the cam chain tensioner is a good place to look...some of them have a little plug glued into the end of them in addition to the gasket between the tensioner and the case...the little plugs can seep too. Remove, clean thoroughly, reseal with sealant of choice...
On my '82 XJ1100J, there is also a metal oil line that connects to the block under the carbs (and under the airbox like you described)...if yours has that I could posssibly leak.
Good luck!

 

What s your compression? It is possible you are starting to get excessive blow by from the cranckcase breather to the airbox which can pull oil into the airbox. This is generally caused by worn rings/cylinders.