• ^^ it does sound like timing, but it fixes itself once cooled down...

    But 99% of suspected fuelling issues do turn out to be electrical. So I concur, It could be a weak spark getting blown out once you open the throttle. Maybe HT leads or coil[pack] getting grumpy when hot?

  • Coils warm up pretty quick, hence when they start to break down the more heat cycles the worse it gets.

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