Timing
I don't think its your carb. I had same situation with my 74 XLH. New VM38, good for a few days and then everything went to hell. Also had to bury the idle screw to keep it running. Would not take any fuel under load. Had my exhaust pipes glowing red. Of course I assumed it was the Mikuni since that was the most recent change. With Pinion Gears help I addressed the ignition system. Found a broken spring on the advance unit. Fixed it and problem went away.
Most recently she started running rough again and again I thought carb. Turns out the new condenser from China was bad. Got about two weeks out of it. Put an old one in and problem solved.
Aside from an oil leak all my problems have been timing related.
While I'm here who can recommend a decent brand of ignition parts. No luck with Accel. Mallory?
John F.
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