My carb slide is binding up in hte bore of the carb. It is the stock kit carb and it was working fine. I went to remove and replace the slider and I could not get the it back in the bore. Holding the slot aligned to the pin, still it would not go in all of the way. I took the carb apart and the slider went in the bore without the emulsion tube on. The emulsion tube fits smoothly over the needle. I put it all together and after 3 times of working the throttle, it bound up. I checked the bore, slider and needle for smoothness and there are no burs, nice and smooth and clean, so I am confused!