When doing the oil change i topped back up a little too much. About 5mm on the dipstick. All seemed ok but then when i did the 30 mile trip to work, left it all day then started up on the evening to come home it smoked like a good un for about 1 min. Im guessing its probably just oil thats gone through the breather into the airbox being burnt off. Anyway it only did this two or 3 times and is running smoke free now. Will i be fine and just need to clean my k&N filter?