2014 ec300 e start no spark

[vwdom]

hi all i am struggling to get my 2014 ec300 to run its always run like a swiss watch in the 4 years i've had it, took it to a track the other week ran fine warming it up then died after half a lap like it ran out of fuel. got it back to the van checked it had fuel all good but had no spark stuck a new plug in and it fired straight up but started pouring fuel out of the overflow so turned it off to sort out the needle valve and its never fired up since. i've tried 4 new plugs, a new ignition coil, checked the stator, cleaned up all the earths and connectors, checked i've got all the feeds to the cdi. am i right in thinking that the cdi isn't fed ac voltage from the stator on e start bikes as it looks like it just uses the trigger on the wiring diagram which would then point to the cdi being dead.