What size pilot jet should I use and main jet. I have v&h exhaust k&n air filter with SE 203 cams I have a pilot jet 48 in there now with a 175 main jet but when I adjust the air mixture screw it does nothing. It back fires in the carburetor and has a pop sound through the exhaust when I let off the throttle.
You can go up to a 50 and 185 main. Should not be too much for your application. Make sure your intake seals are good and that you do not have any exhaust leaks.
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