Scooterotica

can anyone advise me on this i was coasting along when the Engine cut out at 70mph I pulled the clutch in thinking it had blown the piston & slowed to to a stop however I hadnt although i had to bump start it to get it going again i checked the usual plug ,petrol spark etc and found everthing in order
thanks
stine

Possible fuel starvation at that speed.
Check the flow of your tap and also how fast it enters the float bowl as there may be gunk in there or the banjo filter connection.