Re: Running rough, running out of ideas.
Given it's dying as soon as you rev I'd be thinking leccy. Simple point is there are 2 carbs, and however bad one is you should be able to rev the bike on one cylinder, for it to cut that suddenly I'd be looking at electical stuff.
You've checked the spark at idle, but if it's idling fine, and then dying this won't rule it out. Just my first thoughts.
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