I have installed a new carb on my 3-wheeler and it is running at full throttle. No matter what I do it does not change. I’ve set the throttle adj & the pilot screw nothing helps. It does run better with the choke full open, but when closed it runs at full throttle. I don’t know what to look for or what to do to adjust. It’s a 1984 Honda Big Red 200 ES any help would be greatly appreciated.