I have my 2020 RC390 w 1K miles on it. I'm amateur and use it for Florida Track Days. It is Stock and Has Power Commander V installed with Stock Exhaust, Stock intake map to compensate or correct the lean factory behavior. Should I open the Airbox lid to get better performance? I saw a video on...
I have my 2020 RC390 w 1K miles on it. I'm amateur and use it for Florida Track Days. It is Stock and Has Power Commander V installed with Stock Exhaust, Stock intake map to compensate or correct the lean factory behavior. Should I open the Airbox lid to get better performance? I saw a video on...