Oil in airbox?

[watafu]

Hi, recently had to change my throttle cable after it was installed incorrectly by the PO and crimped itself at full throttle mid corner...but that's another story, basically as I removed the airbox I found a fair old amount of oil in there, mostly misted but some pooling as well. As far as my understanding goes, this is usually a sign that the piston rings are on their way out or the oil has been overfilled and forced its way past. Is this fairly common on these bikes or should I be considering a leak down test and some serious overhauling of the engine?? Is it true you have to split the case to put new piston rings in on the nc30's??

[madcusslerfan]

First and easiest thing to check is your oil level, if that's OK then I'd give the airbox a good clean out and check to see if you can replicate the issue. If so then look into the not serious options (ie piston rings etc). [GRINNING FACE WITH SMILING EYES]

[Neosophist]

the oil breather is routerd through the airbox some some oil condensation is normal, if it hasnt been cleaned ina long time / overfilled too will add to it.

clean it all out, make sure your oil level is ok and see how it goes.

[dobbslc]

It's had 20 odd years to accumulate in there so probably all is ok. Give it a clean and try it for a while, I bet after a 1000 miles it's still clean!