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post #3 of (permalink) Old 05-14-2019, 04:01 AM
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Join Date: Jun 2008
Location: Isle of Wight England
Posts: 3,980
Before playing with the carbs, the ignition timing must be spot-on.
Are you using 'Triumph' thick O-rings? Not the skinny Amal ones. Do you have the correct washers, cups, etc for the mounts?
Use a thin smear of grease to hold the O-rings in place.
Although 1 1/2 turns out for the air/mixture screw is nominal, the set-up must be tuned.
*note the gap between the flanges, with the thick O-rings at the start of the video.

Tuning about 3 1/2 minutes into this:
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