Intake and carb choice
Jets don't do anything for idle. You have a fairly large camshaft which is going to complicate things a little.
Is it rich on cruise? How have you indentified which circuit to adjust?
How do you know it's rich? Have an A/F meter?
If it's at idle and low speed cruise, lower the float level 1/8 of a turn on all float bowl adjusters. See if it helps.
Cruise at low speed is idle feed restrictors that do the metering.