You need to dial the mixture screws in a little...

Set your idle at around 400 rpm.. it will barely run.. then set the carbs.... make them identical....

set the front one until idle increases, then back it in until it starts to die and then back out a half turn...

do the same with the back one..

then set the idle speed screws identical...

check spark plugs...

You want your vacuum at as close to 0 as possible when doing this...

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1968 w110 230 Fintail