Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
It will only easily fit one way
(1) If you are turning it by the nut on the generator it means the cover is off and the oil gallery blanking plug will fire out letting oil go all over the floor(2) the bits inside the filter bolt are exremely impoetant as without them oil bypasses the filter--easiest way is buy a new bolt they come complete(3) to see if oil is getting to top end remove the polished end caps and the steel brackets they bolt too and oil should pour out of the bolt hole which is why there is a soft alloy washer between the cam cover and steel bracketIt takes a while for the system to fill and put oil to the top end, maybe 5-10 minutes of kickingAs to bang noise only thing I can think of is kickstart gear