2006 Yamaha V Star Classic "power shot vent" Questions

...power and sounded like a lawnmower. I figured then would be a good time to rejet, so I did it according to the instructions: - 3.5 turns on PMS screws - adjustable needle to 5th position - changed ...

...power commander on it ? If you do they are known to go bad and mess up runablilty. This may be a long shot but since you have the magnelli marelli fuel injection system , you might need a hot/cold ...