Fuel Cap Breather

[darrsi]

I was gonna wait until the end of the week and report that since my shiny new fuel cap has been fitted the bike has started on the button morning and evening without any issues, and been running absolutely fine.


Well it was until this evening.


I'll make it simple, the bike was put on the centre stand for a change behind a wall at work due to the high wind and ropey weather.


On centre stand, all lights and accessories off, i start the bike with the choke.


I adjust the choke until it's maybe a third of the way and happily revving away but not anything mad, then leave it alone to put my balaclava and lid on.


After 30 seconds of happily purring away, the engine just stops dead, as if i hit the kill switch. It didn't die out slowly as if starved of fuel, just off.


Then, it won't start, after about 3 attempts.


I switch off, finish doing my lid up and putting gloves off, take it off the centre stand and then it starts straight away as if nothing is wrong and i'm off home with no problems at all.


Question is, what can stop an engine dead after 30 seconds of revving on the choke at around 2500rpm?