Since I installed my Epco's last year and a UNI filter I always see a little bit of oil on the ground after every ride. I don't have any leaks, it's just oil that has been drawn into the airbox through the crankcase breather tube and then drains out through the drain tubes. It's never enough to cause me any major worries but I do check my sight glass regularly to make sure that I'm keeping it between the lines.
