some kind of drain tube that needs to be drained. Its a tube that gets full if you can't find it I'll look it up for you.
I just realized that I made a post with a link to post that I made with a link to another post I made arghhhhhh
Chad, I have a thunder tornado, and I posed the same ? on the national boardhttp://www.vtxoa.com/forums/viewtopic.php?t=136242&highlight=tornado+clubI didn't get a very good response, but here it is....the thunder air boxes don't seem to have the oil and moisture trap that the stock air boxes have...I seem to have this occur right after I clean my filter, and have attributed xcessive oil leaking to over oiling the filter....been told by several knowledgable people that this small amount of oil will not hurt anything...and it does not seem to have on mine..been through 2 oil changes and no problems...I know its not much help but all I have to offerBryan