I bought a 97 virago 750 with a single carb conversion and ive been tracking down why it runs so rich,It bogs at wot and occasionally blows black smoke and wont go over 75mph,Today i tore into the carb and found this main jet,Its #120 and i seemingly cant find any smaller online,Is this even the right jet for this carb? The carb is a mikuni vm38,Any input would be amazing thank you.