From your video, it appears you have a '77 model? If the carbs are stock, stock needle clip setting would be in the middle #3 slot. You shouldn't need to move it from there if you have no mods or haven't changed any of the other jets. But, maybe someone before you changed stuff? Here's a chart I made up showing the stock jet sizes .....
Compare what sizes you've got to what should be in there. Also compare the needle number. I say this because there are aftermarket rebuild kits out there that come with the wrong size jets and the wrong needle. If someone put one of those kits in, your carbs could be way out of whack.
Compare what sizes you've got to what should be in there. Also compare the needle number. I say this because there are aftermarket rebuild kits out there that come with the wrong size jets and the wrong needle. If someone put one of those kits in, your carbs could be way out of whack.