Mystery of the Bogging Throttle - Maxi

mishary /
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I finally got my project Maxi back together, but its not running right. It starts fine, maybe bogs a little then runs great. However, once the rpms get high enough, the throttle dies. No clue whats going on. Too rich? Too lean? Bad timing? Bad points?

I've played around with all of the variables, but it still seems to have this weird tendency to cut out at a high rpm. It almost sounds like it stops firing, but I have no idea what is the issue.

To be more specific, it revs and accelerates, but once it reaches a certain speed/rpm/throttle position (I'm not 100% on any, though I think its the rpms), the throttle stops functioning and the motor peters down to idle.

I case matched it and opened up the intake a little bit, but nothing too aggressive. K-Star with a 14mm Bing. I matched the intake port for a larger intake (I had dreams of a 17mm Bing), but I don't think thats the source.

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