I put a K&N air filter on the stock carb and now it has a slight bog when you give it gas. I was told I may need to change the pilot jet and maybe adjust the needle. There is only one jet inside the carb which I believe would be the pilot and the needle has no adjustment (only one setting). I believe the jet is a stock 58 and the needle is stock too. I´m looking for advice on how to change the jet and needle to get the original throttle response out of it.