u/Fun_Run_7325

I have a Husqvarna svartpilen 401 2023 , i have been running it for nearly 2 years now only 4k miles installed a Fuelx lite on it when I got it , and did the resonator delete , into a slip-on with a baffle, bike was running right no stalling issues or anything.

suddenly it started having a rough idle and something cuts out , last night coming to work it threw a yellow check engine light and runs very rough around 4-5k rpm , I got home put and one reader on it and it says missfire cylinder 1 .

any suggestions what I can check thanks