Get the Bendix fettled, it's clearly worn/misadjusted, or if you must ditch the original part, get a proper H-D OEM CV at a swap meet.
Remember, H-D used the Bendix from 71-75, on more than 300,000 motorcycles. It's been proven to work good. But as Kev says, they wear.
Meanwhile, I've seen some TERRIBLE reports of those copy carbs from China.
Why anybody would even want to think about putting a piece of cheap shit like that on their Harley - a critical part, no less! - is beyond me.
In the car world, a couple of years ago a guy with 35+ yrs experience with V8 carbs bought a Chinese copy of a Rochester QuadraJet off eBay just for a laugh and put it on his late 1960s Buick muscle car, which came with a QJ from GM.
He had to drill, adjust, improvise and replace much of the inner and exterior workings of this cheap imitation and STILL could not get it to work even half as good as the tired original on his car, despite two days of effort and all his knowledge. In the end he threw it in the trash, but not before detailing his experience with pictures. It was sobering reading.