I have a quick question if anyone would happen to know? I got a needle and slide from DRatv for the stock carb on my 1980 CT70 and got my bike together and running. The needle and slide was missing. I also changed out the pressed in seat for the needle. But now I can’t tune the midrange of the bike. I’m ok at idle, then It falls on its face then picks up at WOT. Is it possible that the 1980 carb slide is different from the ones up to 1977? It seems like 77 is a cutoff year for all of the aftermarket carbs I look at. I just wonder if I have the wrong slide-needle in it? And thoughts?? Thanks.