390 RR-S 2020 backfiring, hesitating, fuel blockage?
Posted: Sat Jul 15, 2023 10:26 am
Have 2020 390RR-S. Approx 4,000 mi. Flawless performance from day 1. However, during ride today started backfiring and seemed to have a lag in response when twist throttle. Also seems like it’s intermittently starving for more fuel. Something is amiss. Mapping switch seems to be functioning properly. I always have it for sunshine here in SoCalif. Any suggestions/experience as to what I may be dealing with? Fuel pump? EFI? The backfiring like a carb bike has me scratching my head. Thx