So – none of the Suzuki experts could tell me the direction of rotation of the pump !!!
After some head scratching, I jury rigged some hose from the intake into a jar of petrol [ don’t try this at home kiddies ] and spun the spindle end with my power drill using the chuck tightened on the spindle !
Well, I can confirm that the pump is very efficient ! A litre of petrol was sprayed over the shed – and me, in very short order. However, I did manage to confirm that the pump rotates clockwise from the sprocket end – making my installation that much easier.