The jets won't change how it sounds, jets regulate the fuel to ait ratio.
If you run your pipes uncorked inccrease your main jet 2-3 sizes up. For example if there is a 165 in there now try a 175 or 180 and then check the plugs to determine the rich/lean condition.
White plug = lean ,you need a bigger jet
dark plug = rich ,you need a smaller jet
A dusty tan color is the ideal.
additionally you'll have to adjust your pilot screw for the low end fuel air ratio.
*****But again, jets don't effect the sound.*****How to rejet mikuni 45 carb on heritage softtail twin cam 88?
The pilot jet and the secondary jet, you might have to go to a smaller jet needle. I wouln't worry about the main jet, It doesn't come in to play till you get up to 3/4 throttle. Try to find a place you can hold it open for about a mile then pull the clutch in and shut off the engine , float to a stop then check your plugs. They should be tan colored. I had a few Mikunis on HDs, I loved them. You can replace the jets without taking it off the bike.How to rejet mikuni 45 carb on heritage softtail twin cam 88?
Carb jetting is not an exact science - it's more trial and error.
Contact me for a carb trouble shooting guide.
It will give you tests to make while riding and explain what needs to be changed/adjusted for optimum running performance.
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