yes, but there are multiple circuits inside a carb. It's not magical black box:
- start circuit
- idle circuit
- pilot circuit
- main circuit
One or more can be clogged and one or more can be clear at same time. Most common issue is start circuit since it has smallest jets and passages.
forget spray cleaners, they no longer work with removal of chlorinated compounds. Don't waste your time. If you're gonna do anything with carbs, completely disassemble them down to every last component, nut, bolt, springs and do thorough scrubbing. Nothing short of that will do anything to improve your situation.
After spraying, you'll want to scrub all these fuel-circuits to clean them. Then soak in ultrasonic cleaner, then micro soda blast.
that's just beginning. You'll want to replace all rubber parts: O-rings, float/valves, float-bowl seals. Adjust float-heights, sync carbs, etc.
here's quick intro to carbs:
https://www.ninjette.org/forums/showthread.php?t=355132