I don't think the extractors glow, and even if they do that's not the issue here. I have a gas station like 2kms from home with no possibility to drive hard on the way there and I had that issue going there more than one time. On the last time I had to push the car and start it in 2nd gear.
As for the extractors, the bends they have were made to ensure equal length on the tight space on the engine bay (left hand drive, issues with steering column and all that).
And yes, it's running on bike carbs!
@Banjo check your PM's because you have something there since January or so 😅