Ok so I was riding last weekend and everything was great, parked it and decided to take it for a spin today. Started right up but immediately went to full throttle! Though it was a sticky throttle cable but when I pressed the throttle to accelerate it reved even higher! So I then tried adjusting the idle and fuel/air mixtures screws but it did nothing, their was no apparent effect when I scewed them either in or out. I then took the carb off and replaced it with a carb from my 84 that I knew for a fact worked, and I got the same effect, I then changed the throttle cable out with the one from the same 84 that I knew worked and it still reved really high when i start it up, I tried the wd40 test for a vacuum leak and I couldn’t find one, I am completely out of options now please help!!???