I have just bought a GV650,when driving at speeds over 100kmh engine dies and comes to a halt, a few seconds after stationary the engine starts and off you go again until speed over 100kph causes the engine to die again. I replaced the fuel pump with no improvement, carbies cleaned and spark plugs changed. Petlock dismantled and found someone had already been in there and used silicone sealant, I have removed all the sealant and cleaned the diaphram. However I put it back together with the hole in the housing that exits the rear of the tap with the hole in the plastic plate and the hole in the diaphram. When you turn on the engine fuel spurts out of the hole in the tap housing. Can you tell me what orientation the diaphram and plastic plate and housing should be in to make the petlock operate correctly? No info in workshop manual about this!