Popping at WOT (video attached)

Luigi Garzone /
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V1 polini, case matched, VM20 with 160 main jet (started at 145 and upjetted trying to help fix problem) + sidebleed estoril

If I hold 3/4 throttle or go straight to WOT I start getting popping noises from the top end that sounds like detonation. The bike cuts out and bucks when this happens.

I'm running stock points at 18° btdc. Since jetting changes haven't helped I'm thinking I have to bite the bullet and get a CDI with a curve.

Do you think this is a timing issue? Happens within a minute of starting the bike so I don't think I'm overheating this quickly

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