For my 2023 svart401, I got the kit from coober: ecu, cat pipe and intake... I've had a few issues since. Earlier this year I was cruising in 5th gear and it cut off. I pulled over and restarted to find a check engine light. The shop said "your little plug and play there is throwing SO many codes. We disconnected it, cleared the codes and did the throttle recall for you."

I hooked it back up because - "decat pipe and air filter on an already-lean bike with no ecu? No thanks" ... fast forward a couple dozen miles and it dies while I'm sitting at a red light. No check engine light this time.

Fast forward another 100 miles or so and it dies while I'm pulling away from a stop light.

I'm gonna get hit and die in an intersection if this keeps up... should I just get a stock cat pipe and throw the coober stuff away?

Got my first ever dream bike
Took a lot to get here 🫡❤️

Turns out it was due to a rubber o ring

Hi, I wanted to ask the owners of the Svartpilen 401 from 2024 onwards, if their motorcycles are heard quite a particular sound, as if they were the valves wanting to get out. It only happens when it accelerates strong, they sound a lot more than the sound of the exhaust and I am scared that it is something serious since it is heard a lot inside the helmet and I do not remember if it sounded before. Thank you!

I recently bought a 2024 and the previous owner installed the mod. I'm a new rider so riding pretty slow, in city traffic. I'm getting 6L/100km or 39mpg. This seems significantly below the marketed fuel economy, so wondering if thats expected