Actually, going back to the original question, I think the confusion arises from information relating to MO1 magnetos which are for singles like the B31 and Gold Star etc. These magnetos were available with either 'slack wire advance' or 'tight wire advance' in fairly equal numbers, the 'slack wire advance type' being generally later versions of the same magneto for BSA applications. The benefit of 'slack wire advance' is that the normal running position for the magneto (i.e. when the bike is cruising and in most normal running situations) is the fully advanced ignition position, so, if the lever is inclined to slacken off due to vibration or lack of friction the magneto defaults to its fully advanced position. Owners with 'tight wire advance' were regularly complaining that they found themselves having to check frequently that the lever hadn't slipped, causing the magneto cam to slide into a retarded position which causes the bike to overheat and blue the exhaust. K2F magnetos, for twins, nearly always rotate anticlockwise (so the points rotate clockwise), Royal Enfield and Vincent being the only exceptions which spring to mind easily. The popular, anticlockwise mags, have cam ring housings with the cable take-off on the left hand side pointing upwards so that pulling the cable turns the cam clockwise therefore causing the points heel to strike the lift later, i.e. retarding the ignition. Cam ring housings with the cable take-off on the right hand side are extremely rare and are usually intended for R.E. and Vincent models to enable 'slack wire advance' for clockwise rotating mags. I think I've probably killed this thread off now as everybody has fallen asleep and I'm going to get nominated for the 'Dull Men Calendar' - see other thread, very funny!