All 650's Crush Washer / Gasket on O2 Sensor?

[RC74daniel]

I'm currently installing my Akrapovic exhaust on my 2016 CBR 650 F and noticed that nobody on the internet (install videos and I couldn't find a post here either) talks about the copper crush washer on the O2 / Lambda sensor. Not even the Akrapovic manual or the service manual mention it. Is this something the previous owner may have added? Is it even a crush washer? As far as I know they're single use as they're being crushed, so I'm very inclined to use a new one. I think the ones I used for the oil drain plug even fit.

Do you guys have any experience with that? Thank you!

 

[RC74daniel]

Okay, after some further research for o2 sensors in general, it seems the washers are reusable. I presume this is the case here. If anyone can confirm, that would be great

 

[Brammers]

I reused mine before I did the delete. No issues, just make sure it's tight.

J

 

[RC74daniel]

Got it, thank you!