I have K carbs that are dated 1977. They go on a sohc engine honda. I rebuilt all 4 carbs and when I tried to push the last slider in on the last carb (the carb with the big lever on it) it was really difficult to go down...I had to push, then it went in fine. It seemed like the first inch or so was difficult then became okay. Will this cause a problem down the road. THanks.