It works better on the 39mm than on the 36mm. It just doesn’t seem to get lean enough on the 36mm. There is a little spacer to go under the master tune main jet that helps with it but only works so well. We have tried the master tune on a 30mm ICC carb and it gets even worse and never gets close to be lean enough on a hot day.
Has anyone used the Dellorto main jet adjuster seen here:
It looks like it is designed for the 30mm carb and therefor is designed to get lean enough. The one concern I have is does it fit on an ICC kart well? It looks like it would have a hard time bending under the carb and not rubbing on the ground. The master tune comes in at a 90 degree angle under the carb to fit on karts well. Any info on this would be great. Thanks.