Hi Mark..The 'timing cover' description confused me there! If what you have is a timing side crankcase half it is from either a BSA B31/B33 or an M33...Ian
hi ian
the bloke i bought it off is a wm20 man, so it has baffled me, as i said the barrell stud next to the tappets have a threaded sleeve like the tappets and what seems to be long rods sticking from them, i will take picture and send to you