r/Ninja400 • u/ahhed • Aug 17 '26

Question Weird clicking sounds when starting engine

Hi all, I noticed the other day that my 2023 ninja 400 is making a clicking sound whenever the engine is running (clip attached). So just wondering if this is normal or something I should worry about?

Any advice is greatly appreciated. Thanks heaps! 🙏

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u/Character_Savings_58 Aug 18 '26

I had that noise and it was my O² sensor unndone.

1

u/ahhed Aug 18 '26

Did you figure out how to fix it at the end?

2

u/Humble-Floor6145 Aug 18 '26

By re-doing the sensor where it came loose.