748 SPS used to weap a little oil from that rear gasket - we managed to (in situ) lift the rear cylinder slightly and seal it with some liquid gasket stuff - never leaked again!
Hi, The oilfeed is for the 900 two valve motors (common part) it's not used on the 4 valvers,but it's still under presure. It's ok to blank it off with a grub screw thus doing away with the chance of it leaking! Steve