There is no nut in the oil cap.i drained some off the oil..couldnt find anything in the oil tank..plus i wanted to remove the oil tank and check if anything is in it,but no luck on unbolting it..im not worried about the oil level,but of a bolt or dip stick interfering with the oil circulation..end of sept build,do they have dip sticks?first day m3w home oil cap had no dip stick or bolt.what made me think twice was when i read the manual booklet