I suggest you check the sync of the slides again. Sometimes the cable is a bit hung up somewhere.
Davo
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1965 Honda CP77 — Ulsan Metro City, Rep. Korea
Restored with original parts — Owner: J. Doe
new cb77 owner. running/idle issues
Cable routing
Take your air cleaners off and watch your slides as you pull the clutch lever in. I would take a look to make sure you do not have a cable routing/binding issue. You may still have some jetting issues that need to be sorted out, but there seems to be more going on than just that.