Katana Owners Club U.K.

750 efe cover fits on with three retaining nuts, I believe yours fits with five. the oil seal for your model should fit. The cover plate you've got is most likely from an 1100efe.

If your still not sure post a picture of the front of the engine.

Like Mal says, you've probably got an 1100EFE filter cover as you need 5 studs. Assuming this then standard filter and standard oil seal, no probs.