12-06-20, 08:42 PM
When you say main jet do you mean emulsion tube (long with tiny holes) as it has an O ring, the main jet doesn't and screws into the bottom of the emulsion tube? They should both be nipped up with a small oring spanner and a bladed screw driver, if the emulsion tube is lose it will allow too/much air into the mixture at mid to high range, which would explain your problem.
It could also be an air leak at the manifold rubber, check the carb is seated correctly (pushed all the way in) and the clip is sufficiently tight. Let me know how you get on, there's still a few other things to try.
It could also be an air leak at the manifold rubber, check the carb is seated correctly (pushed all the way in) and the clip is sufficiently tight. Let me know how you get on, there's still a few other things to try.
Later