I agree, I try to re-use all factory brass. Only replace float needles and seats, same as your doing. Ensure the "wishbone" shaped springs are installed correctly. They have a slight bow to them so they keep float valve seat seated properly. Otherwise the float valve seat can slip out just enough to reek havoc to float levels. Another thing to look for is worn Slide seats. (the short tube the slide needle fits into can get egg shaped). Allowing fuel to pass when slide needle is all the way down and too much fuel when slide rises. Ill search for some more of my links and what not. Use a chopstick to press them out if they need to be changed out or cleaned up.Thanks again for the replies and video.
Yes i am using the stock air filters and box, nothing has been modified.
I have a brand new old stock needle and sets coming as i think on my original one the springs are a tad weak as they aren't as springy as the one in the video.
I did have a full set of after market needles . seats , seals, but from what i have heard it is best not to use them as they are not quiet correct.
So going back to the original parts minus the needle and seat as they were a bit damaged when i removed them.
I think also the syncing is off as mentioned, i will take another look at that also.