I have a 87 Lt with factory pipe and FMF slip on wisco piston no porting and reed spacer.....when it idles it loads up on me when I ride it it trays to load up until the rpms are higher it has a 240 main jet can't make out what the pilot jet is in it cleaned carb and but in new needle valve as it was leaking....fixed that but still loads up any ideas live in Iowa elevation is around 1100-1300.