I am installing a rear derailleur for the first time and throwing in some new cables/housing. I installed it and I can successfully shift to all gears and the pulleys are aligned, and there's enough tension (i think!), etc.
Shifting is quiet on some cogs yet feels 'heavy' ie there's a clunk when shifting into some other gears that is both felt and heard in the drivetrain. Is this a fault of my amateur pedaling or a fault in my servicing the rear derailleur or chain? I followed park tools and campys instructions, as well as some youtube videos but can't seem to figure out if this issue is normal or not. How can I fix this or is it normal?