Carb pop quietly 1/8-1/4 throttle

Hello! I have a 79 650, the bike came with filter pods(which I know cause all kinds of strange things but it is what it is). The bike runs great, I jetted it myself because it wasn't done correctly when I got it.

However, when I am at lower cruising speed 25-40 mph and BARELY on the throttle, there will be a light and quiet but consistent flutter or pop that comes from the carbs. But upon decent - hard acceleration it stops and the bike rips.

I am thinking maybe the pilot jet too lean? Although, richening up the air screws didn't do anything.

Ideas?

Are the carbs synced and the valves clearance checked???

Most likely ignition related; poor power to coils. Check this article:
wgcarbs.com/index.php/using-joomla/exten...-categories/89-coils

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