Motobecane Dellorto 15.15 won't idle FRUSTRATE

Emperor Swagustus /
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So I got my '80 motobecane running good, all cleaned up and healthy, then put the 15.15 SHA with 15mm intake. I have the 25mph model with stock cylinder. I have a 58 jet. It runs great up to 35 mph or so but won't idle at all, and starts a little hard (lots of pedaling needed). I tried higher jet (61) and it helped the idle a bit but was too rich. Any suggestions? My cable is slack enough to let the slide go down far enough.

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