Peugeot Tweet 125cc Cutting out ?

Hi all, my Peugeot Tweet 125 Intermittently cuts out when trying to pull away from a standing start. Idle Speed seems ok (Bike will sit at idle and not cut-out), Auto choke works and the bike starts 1st time every time. However, when stopping at lights / junctions then trying to pull away, the bike will intermittently cut-out. Very Frustrating in peak traffic!!!
It seems to happen whether the bike is hot or cold, has been running a few Kms or just started. Anyone any ideas? BTW I'm using 98 octane fuel and the bike has just done 7000Km.