Linkage is always a challenge.
I had purchased a lever set that controlled 2 carbs at the same time.
This is what that looks like installed.
The right lever is supposed to fit between the 2 spring parts on the left lever.
As you can see spacing is something I didn't expect a problem with.
These carbs are spaced too far apart to use this linkage "solution"
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And you can see in this picture the dual lever has a different ratio than the single.
So if it had worked I would have created another issue.
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And of course the Clifford throttle shaft is shorter than the Redline system.
This is why one of the carbs is an issue on throttle action.
2 Rod End Bearing Supports VS 3 on the Redline.
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Redline
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If it was easy........