So I changed my spark plugs last night (definitely easier going through the top as long as a universal socket is available) and there was oil on the all the spark plugs. Not a lot, but it was definitely there. The plugs were in good condition for having at least 9,000 miles on them (maybe even 14,000, can't tell when previous owner changed them or if he did). The bike went down last October, all fairing and cosmetic damage. No leaking fluids and it doesn't seem to burn oil. So is it normal to have some oil on the plugs?